Communication

405 relations: Adaptive bitrate streaming, Adaptive differential pulse-code modulation, Adaptive Multi-Rate audio codec, Adaptive Multi-Rate Wideband, Adaptive Transform Acoustic Coding, Adler-32, Adobe Flash Player, Advanced Audio Coding, Advanced Encryption Standard, Advanced Micro Devices, Advanced Systems Format, Aldus, Alias Systems Corporation, All-pass filter, Alliance for Open Media, Alpha compositing, Amlogic, Amplitude modulation, APNG, Apple Inc., Apple Intermediate Codec, Apple Lossless, Apple ProRes, Apple Video, Application-specific integrated circuit, ARM architecture, Asao (codec), Assembly language, Asus, ATI Technologies, ATSC standards, Audio Interchange File Format, Audio Lossless Coding, Audio time stretching and pitch scaling, Audio Video Interleave, Audio Video Standard, Autodesk, Autodesk Animator, AV1, AVCHD, Avid (company), Avid DNxHD, AviSynth, AVR32, Band-pass filter, Band-stop filter, Base64, Bayer filter, Binary image, Bink Video, ..., Bitcrusher, Blackfin, Blender (software), Blowfish (cipher), Blu-ray Disc Association, BMP file format, Boxee, Broadcom Crystal HD, Butterworth filter, C (programming language), Camellia (cipher), Canopus Corporation, CAST-128, CD+G, CEA-708, Chebyshev filter, Chorus effect, Chroma key, CIE 1931 color space, Cinepak, Codec, Color balance, Color histogram, Color space, Comfort noise, Comma-separated values, Command-line interface, Companding, Compiler, Computer program, Concatenation, Consumer Technology Association, Convolution, Core Audio Format, Cropping (image), Crossfeed, CUDA, Cyclic redundancy check, Data Encryption Standard, DC bias, De facto standard, DEC Alpha, Deinterlacing, Delay (audio effect), Desktop computer, Digital biquad filter, Digital container format, Digital Picture Exchange, Digital Speech Standard, Digital Video Broadcasting, Digital Video Interactive, Dirac (video compression format), DirectDraw Surface, Dissolve (filmmaking), DNxHR codec, Dolby Digital, Dolby Digital Plus, Dolby Laboratories, Dolby TrueHD, DSP Group, DTS (sound system), DTS-HD Master Audio, DV, DVD Forum, Dynamic Adaptive Streaming over HTTP, Dynamic range compression, Edge detection, Editing, EIA-608, Electronic Industries Alliance, Electronic mixer, Emphasis (telecommunications), Enhanced Variable Rate Codec, Entropy encoding, Equalization (audio), ETSI, European Union, Eval, FAAC, Fabrice Bellard, Fade (audio engineering), Fax, Ffdshow, FFV1, File Transfer Protocol, Finite impulse response, FLAC, Flanging, Flash Video, FLIC (file format), Floating-point arithmetic, Fraunhofer FDK AAC, Free software, Frequency domain, Front and back ends, Full Rate, Fuzzing, G.711, G.722, G.723, G.723.1, G.726, G.729, Gaussian blur, General Exchange Format, GIF, Git, GitHub, Global IP Solutions, GNU General Public License, GNU Lesser General Public License, Google, Google Chrome, Gopher (protocol), Graphical user interface, Grass Valley (company), Grayscale, Group 4 compression, GStreamer, H.261, H.262/MPEG-2 Part 2, H.263, H.264/MPEG-4 AVC, HandBrake, Headphones, High color, High Definition Compatible Digital, High Efficiency Video Coding, High-Efficiency Advanced Audio Coding, High-pass filter, HMAC, HTTP Live Streaming, HTTPS, Hypertext Transfer Protocol, IA-32, IBM, Icecast, Image scaling, Image stabilization, Indeo, Indexed color, Industrial Light & Magic, Infinite impulse response, Instruction set architecture, Intel Clear Video, Intel Quick Sync Video, Interactive Multimedia Association, Interchange File Format, International Electrotechnical Commission, International Organization for Standardization, International Telecommunication Union, Internet Draft, Internet Engineering Task Force, Internet Low Bitrate Codec, ISO base media file format, ITU-T, ITunes, Java (programming language), JPEG, JPEG 2000, JSON, Kodi (software), LADSPA, Launchpad (website), Lempel–Ziv–Oberhumer, Libav, Libavcodec, Library (computing), Libvpx, Limiter, Linux, List of open-source codecs, Lossless JPEG, Low-pass filter, Lucasfilm, LV2, MacOS, Material Exchange Format, Matroska, Matrox, MD5, Media Player Classic, MediaInfo, Meh, MEncoder, Meridian Lossless Packing, Microsoft, Microsoft Media Server, Microsoft Open Specification Promise, Microsoft Video 1, Microsoft Windows, MIPS architecture, Monochrome, Motion interpolation, Motion JPEG, Moving Picture Experts Group, Mozilla Corporation, MP3, MPEG program stream, MPEG transport stream, MPEG-1, MPEG-1 Audio Layer I, MPEG-1 Audio Layer II, MPEG-4 Part 14, MPEG-4 Part 17, MPEG-4 Part 2, MPlayer, Multimedia, Multimedia framework, Multiplexing, MurmurHash, MythTV, Netpbm, Netpbm format, NewTek, Nippon Telegraph and Telephone, Noise gate, Noise reduction, Nvidia NVENC, Nvidia PureVideo, Ogg, On2 Technologies, OpenCV, OpenEXR, OpenMG, Optical character recognition, Opus (audio format), Oracle Corporation, Packed pixel, Panning (audio), Peak signal-to-noise ratio, Perian, Phase modulation, Phaser (effect), Pixlet, Planar (computer graphics), Plex (software), Portable Network Graphics, Post-production, PowerPC, Presentation timestamp, Prewitt operator, Pseudonym, QDesign, Qualcomm code-excited linear prediction, QuickTime Animation, QuickTime File Format, QuickTime Graphics, RC4, Real Data Transport, Real Time Streaming Protocol, Real-Time Messaging Protocol, Real-time Transport Protocol, RealAudio, RealNetworks, RealVideo, RenderWare, ReplayGain, Request for Comments, RGB color model, RGBA color space, RGBE image format, RIPEMD, RTMPDump, Run-length encoding, SAMI, Sample-rate conversion, Secure Real-time Transport Protocol, Server Message Block, Session Description Protocol, SHA-1, SHA-2, Silicon Graphics, Silicon Graphics Image, SimCity 3000, Simple DirectMedia Layer, Smacker video, Snappy (package manager), Sobel operator, Society of Motion Picture and Television Engineers, Softpedia, Software patent, Sony, Sorenson Media, Source code, SPARC, Speex, SSH File Transfer Protocol, Standardization Administration of China, Stream Control Transmission Protocol, Structural similarity, SubStation Alpha, Subtitle (captioning), Sun Microsystems, Sun Raster, The Open Group, Theora, TIFF, Time domain, Tiny Encryption Algorithm, Transcoding, Transmission Control Protocol, Transport Layer Security, Truespeech, Truevision, Truevision TGA, TwinVQ, Twofish, UDP-Lite, Unified Video Decoder, Unsharp masking, User Datagram Protocol, VC-1, VDPAU, Vectorscope, Version control, Video Acceleration API, Video Coding Engine, Video coding format, Video post-processing, Video scaler, VideoLAN, VisualOn, VLC media player, Vorbis, Voyeur (video game), VP3, VP6, VP8, VP9, Waveform monitor, WebM, WebP, WebVTT, Windows Media Audio, Windows Media Center, Windows Media Video, World Wide Web Consortium, X BitMap, X PixMap, X86, X86-64, Xine, Xiph.Org Foundation, XMedia Recode, XML, XTEA, Xwd, YouTube, YUV, Zigzag, 3GP and 3G2, 3GPP, 3rd Generation Partnership Project 2, 8-bit color. 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Adaptive bitrate streaming

Open Content Alliance Adaptive bitrate streaming is a technique used in streaming multimedia over computer networks.

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Adaptive differential pulse-code modulation

Adaptive differential pulse-code modulation (ADPCM) is a variant of differential pulse-code modulation (DPCM) that varies the size of the quantization step, to allow further reduction of the required data bandwidth for a given signal-to-noise ratio.

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Adaptive Multi-Rate audio codec

The Adaptive Multi-Rate (AMR or AMR-NB or GSM-AMR) audio codec is an audio compression format optimized for speech coding.

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Adaptive Multi-Rate Wideband

Adaptive Multi-Rate Wideband (AMR-WB) is a patented wideband speech audio coding standard developed based on Adaptive Multi-Rate encoding, using similar methodology as algebraic code excited linear prediction (ACELP).

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Adaptive Transform Acoustic Coding

Adaptive Transform Acoustic Coding (ATRAC) is a family of proprietary audio compression algorithms developed by Sony.

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Adler-32

Adler-32 is a checksum algorithm which was invented by Mark Adler in 1995, and is a modification of the Fletcher checksum.

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Adobe Flash Player

Adobe Flash Player (labeled Shockwave Flash in Internet Explorer and Firefox) is freeware for using content created on the Adobe Flash platform, including viewing multimedia contents, executing rich Internet applications, and streaming audio and video.

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Advanced Audio Coding

Advanced Audio Coding (AAC) is a proprietary audio coding standard for lossy digital audio compression.

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Advanced Encryption Standard

The Advanced Encryption Standard (AES), also known by its original name Rijndael, is a specification for the encryption of electronic data established by the U.S. National Institute of Standards and Technology (NIST) in 2001.

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Advanced Micro Devices

Advanced Micro Devices, Inc. (AMD) is an American multinational semiconductor company based in Santa Clara, California, that develops computer processors and related technologies for business and consumer markets.

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Advanced Systems Format

Advanced Systems Format (formerly Advanced Streaming Format, Active Streaming Format) is Microsoft's proprietary digital audio/digital video container format, especially meant for streaming media.

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Aldus

Aldus Corporation was a software company that developed desktop publishing (DTP) software.

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Alias Systems Corporation

Alias Systems Corporation (formerly Alias|Wavefront), headquartered in Toronto, Ontario, Canada, was a software company that produced high-end 3D graphics software.

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All-pass filter

An all-pass filter is a signal processing filter that passes all frequencies equally in gain, but changes the phase relationship among various frequencies.

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Alliance for Open Media

The Alliance for Open Media (AOMedia) is a non-profit industry consortium for the development of open, royalty-free technology for multimedia delivery headquartered in Wakefield, Massachusetts, USA.

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Alpha compositing

In computer graphics, alpha compositing is the process of combining an image with a background to create the appearance of partial or full transparency.

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Amlogic

Amlogic (sometimes stylized AMLogic) is an American technology company that was founded in the US as Amlogic Inc.

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Amplitude modulation

Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting information via a radio carrier wave.

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APNG

The Animated Portable Network Graphics (APNG) file format is an extension to the Portable Network Graphics (PNG) specification.

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Apple Inc.

Apple Inc. is an American multinational technology company headquartered in Cupertino, California, that designs, develops, and sells consumer electronics, computer software, and online services.

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Apple Intermediate Codec

The Apple Intermediate Codec is a high-quality 8-bit 4:2:0 video codec used mainly as a less processor-intensive way of working with long-GOP MPEG-2 footage such as HDV.

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Apple Lossless

Apple Lossless, also known as Apple Lossless Audio Codec (ALAC), or Apple Lossless Encoder (ALE), is an audio coding format, and its reference audio codec implementation, developed by Apple Inc. for lossless data compression of digital music.

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Apple ProRes

Apple ProRes is a lossy video compression format developed by Apple Inc. for use in post-production that supports up to 8K.

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Apple Video

Apple Video is a lossy video compression and decompression algorithm (codec) developed by Apple Inc. and first released as part of QuickTime 1.0 in 1991.

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Application-specific integrated circuit

An Application-Specific Integrated Circuit (ASIC), is an integrated circuit (IC) customized for a particular use, rather than intended for general-purpose use.

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ARM architecture

ARM, previously Advanced RISC Machine, originally Acorn RISC Machine, is a family of reduced instruction set computing (RISC) architectures for computer processors, configured for various environments.

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Asao (codec)

Asao (also known as Nellymoser audio codec) is a proprietary single-channel (mono) codec and compression format optimized for low-bitrate transmission of audio, developed by Nellymoser Inc.

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Assembly language

An assembly (or assembler) language, often abbreviated asm, is a low-level programming language, in which there is a very strong (but often not one-to-one) correspondence between the assembly program statements and the architecture's machine code instructions.

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Asus

AsusTek Computer Inc. (stylised as ASUSTeK or ΛSUS) is a Taiwanese multinational computer and phone hardware and electronics company headquartered in Beitou District, Taipei, Taiwan.

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ATI Technologies

ATI Technologies Inc. (commonly called ATI) was a semiconductor technology corporation based in Markham, Ontario, Canada, that specialized in the development of graphics processing units and chipsets.

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ATSC standards

Advanced Television Systems Committee (ATSC) standards are a set of standards for digital television transmission over terrestrial, cable, and satellite networks.

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Audio Interchange File Format

Audio Interchange File Format (AIFF) is an audio file format standard used for storing sound data for personal computers and other electronic audio devices.

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Audio Lossless Coding

MPEG-4 Audio Lossless Coding, also known as MPEG-4 ALS, is an extension to the MPEG-4 Part 3 audio standard to allow lossless audio compression.

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Audio time stretching and pitch scaling

Time stretching is the process of changing the speed or duration of an audio signal without affecting its pitch.

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Audio Video Interleave

Audio Video Interleave (also Audio Video Interleaved), known by its initials AVI, is a multimedia container format introduced by Microsoft in November 1992 as part of its Video for Windows software.

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Audio Video Standard

Audio Video Coding Standard (AVS) refers to the digital audio and digital video series compression standard formulated by Audio and Video coding standard workgroup of China according to the open international rules.

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Autodesk

Autodesk, Inc. is an American multinational software corporation that makes software for the architecture, engineering, construction, manufacturing, media, and entertainment industries.

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Autodesk Animator

Autodesk Animator, also known as Ani Pro, PJ Paint, PJ, was a 2D computer animation and painting program in 1989 for PC with MS-DOS.

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AV1

AOMedia Video 1 (AV1), is an open, royalty-free video coding format designed for video transmissions over the Internet.

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AVCHD

AVCHD (Advanced Video Coding High Definition) is a file-based format for the digital recording and playback of high-definition video.

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Avid (company)

Avid Technology (often known and styled as Avid) is an American technology and multimedia company founded in August 1987 by Bill Warner, based in Burlington, Massachusetts.

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Avid DNxHD

Avid DNxHD ("Digital Nonlinear Extensible High Definition") is a lossy high-definition video post-production codec developed by Avid for multi-generation compositing with reduced storage and bandwidth requirements.

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AviSynth

AviSynth is a frameserver program for Microsoft Windows developed by Ben Rudiak-Gould, Edwin van Eggelen, Klaus Post, Richard Berg, Ian Brabham and others.

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AVR32

The AVR32 is a 32-bit RISC microcontroller architecture produced by Atmel.

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Band-pass filter

A band-pass filter, also bandpass filter or BPF, is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.

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Band-stop filter

In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels.

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Base64

Base64 is a group of similar binary-to-text encoding schemes that represent binary data in an ASCII string format by translating it into a radix-64 representation.

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Bayer filter

A Bayer filter mosaic is a color filter array (CFA) for arranging RGB color filters on a square grid of photosensors.

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Binary image

A binary image is a digital image that has only two possible values for each pixel.

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Bink Video

Bink Video is a proprietary video file format (extension.bik) developed by RAD Game Tools, and primarily used for full-motion video sequences in video games.

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Bitcrusher

A Bitcrusher is a lo-fi (low fidelity) digital audio effect, which produces a distortion by the reduction of the resolution or bandwidth of digital audio data.

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Blackfin

The Blackfin is a family of 16- or 32-bit microprocessors developed, manufactured and marketed by Analog Devices.

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Blender (software)

Blender is a professional, free and open-source 3D computer graphics software toolset used for creating animated films, visual effects, art, 3D printed models, interactive 3D applications and video games.

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Blowfish (cipher)

Blowfish is a symmetric-key block cipher, designed in 1993 by Bruce Schneier and included in a large number of cipher suites and encryption products.

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Blu-ray Disc Association

The Blu-ray Disc Association (BDA) is the industry consortium that develops and licenses Blu-ray Disc technology and is responsible for establishing format standards and promoting business opportunities for Blu-ray Disc.

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BMP file format

The BMP file format, also known as bitmap image file or device independent bitmap (DIB) file format or simply a bitmap, is a raster graphics image file format used to store bitmap digital images, independently of the display device (such as a graphics adapter), especially on Microsoft Windows and OS/2 operating systems.

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Boxee

Boxee was a cross-platform freeware HTPC (Home Theater PC) software application with a 10-foot user interface and social networking features designed for the living-room TV that enables its users to view, rate and recommend content to their friends through many social network services and interactive media related features.

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Broadcom Crystal HD

Crystal HD is the Broadcom's hardware SIP core that performs video decoding.

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Butterworth filter

The Butterworth filter is a type of signal processing filter designed to have a frequency response as flat as possible in the passband.

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C (programming language)

C (as in the letter ''c'') is a general-purpose, imperative computer programming language, supporting structured programming, lexical variable scope and recursion, while a static type system prevents many unintended operations.

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Camellia (cipher)

In cryptography, Camellia is a symmetric key block cipher with a block size of 128 bits and key sizes of 128, 192 and 256 bits.

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Canopus Corporation

Canopus Co., Ltd. was a manufacturer of video editing cards and video editing software.

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CAST-128

In cryptography, CAST-128 (alternatively CAST5) is a symmetric-key block cipher used in a number of products, notably as the default cipher in some versions of GPG and PGP.

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CD+G

CD+G (also known as CD-G, CD+Graphics and TV-Graphics) is an extension of the compact disc standard that can present low-resolution graphics alongside the audio data on the disc when played on a compatible device.

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CEA-708

CEA-708 is the standard for closed captioning for ATSC digital television (DTV) streams in the United States and Canada.

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Chebyshev filter

Chebyshev filters are analog or digital filters having a steeper roll-off and more passband ripple (type I) or stopband ripple (type II) than Butterworth filters.

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Chorus effect

In music, a chorus effect (sometimes chorusing, choruser or chorused effect) occurs when individual sounds with approximately the same time, and very similar pitches converge and are perceived as one.

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Chroma key

Chroma key compositing, or chroma keying, is a visual effects/post-production technique for compositing (layering) two images or video streams together based on color hues (chroma range).

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CIE 1931 color space

The CIE 1931 color spaces were the first defined quantitative links between distributions of wavelengths in the electromagnetic visible spectrum, and physiologically perceived colors in human color vision.

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Cinepak

Cinepak is a lossy video codec developed by Peter Barrett at SuperMac Technologies, and released in 1991 with the Video Spigot, and then in 1992 as part of Apple Computer's QuickTime video suite.

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Codec

A codec is a device or computer program for encoding or decoding a digital data stream or signal.

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Color balance

In photography and image processing, color balance is the global adjustment of the intensities of the colors (typically red, green, and blue primary colors).

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Color histogram

In image processing and photography, a color histogram is a representation of the distribution of colors in an image.

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Color space

A color space is a specific organization of colors.

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Comfort noise

Comfort noise (or comfort tone) is synthetic background noise used in radio and wireless communications to fill the artificial silence in a transmission resulting from voice activity detection or from the audio clarity of modern digital lines.

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Comma-separated values

In computing, a comma-separated values (CSV) file is a delimited text file that uses a comma to separate values.

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Command-line interface

A command-line interface or command language interpreter (CLI), also known as command-line user interface, console user interface and character user interface (CUI), is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text (command lines).

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Companding

In telecommunication and signal processing companding (occasionally called compansion) is a method of mitigating the detrimental effects of a channel with limited dynamic range.

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Compiler

A compiler is computer software that transforms computer code written in one programming language (the source language) into another programming language (the target language).

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Computer program

A computer program is a collection of instructions for performing a specific task that is designed to solve a specific class of problems.

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Concatenation

In formal language theory and computer programming, string concatenation is the operation of joining character strings end-to-end.

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Consumer Technology Association

The Consumer Technology Association (CTA), formerly Consumer Electronics Association (CEA), is a standards and trade organization for the consumer electronics industry in the United States.

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Convolution

In mathematics (and, in particular, functional analysis) convolution is a mathematical operation on two functions (f and g) to produce a third function, that is typically viewed as a modified version of one of the original functions, giving the integral of the pointwise multiplication of the two functions as a function of the amount that one of the original functions is translated.

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Core Audio Format

The Core Audio Format is a container for storing audio, developed by Apple Inc. It is compatible with Mac OS X 10.4 and higher; Mac OS X 10.3 needs QuickTime 7 to be installed.

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Cropping (image)

Cropping is the removal of unwanted outer areas from a photographic or illustrated image.

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Crossfeed

Crossfeed is the process of blending the left and right channels of a stereo audio recording.

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CUDA

CUDA is a parallel computing platform and application programming interface (API) model created by Nvidia.

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Cyclic redundancy check

A cyclic redundancy check (CRC) is an error-detecting code commonly used in digital networks and storage devices to detect accidental changes to raw data.

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Data Encryption Standard

The Data Encryption Standard (DES) is a symmetric-key algorithm for the encryption of electronic data.

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DC bias

When describing a periodic function in the time domain, the DC bias, DC component, DC offset, or DC coefficient is the mean amplitude of the waveform.

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De facto standard

A standard is a custom or convention that has achieved a dominant position by public acceptance or market forces (for example, by early entrance to the market).

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DEC Alpha

Alpha, originally known as Alpha AXP, is a 64-bit reduced instruction set computing (RISC) instruction set architecture (ISA) developed by Digital Equipment Corporation (DEC), designed to replace their 32-bit VAX complex instruction set computer (CISC) ISA.

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Deinterlacing

Deinterlacing is the process of converting interlaced video, such as common analog television signals or 1080i format HDTV signals, into a non-interlaced form.

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Delay (audio effect)

Delay is an audio effect and an effects unit which records an input signal to an audio storage medium, and then plays it back after a period of time.

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Desktop computer

A desktop computer is a personal computer designed for regular use at a single location on or near a desk or table due to its size and power requirements.

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Digital biquad filter

In signal processing, a digital biquad filter is a second-order recursive linear filter, containing two poles and two zeros.

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Digital container format

A container or wrapper format is a metafile format whose specification describes how different elements of data and metadata coexist in a computer file.

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Digital Picture Exchange

Digital Picture Exchange (DPX) is a common file format for digital intermediate and visual effects work and is an ANSI/SMPTE standard (268M-2003).

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Digital Speech Standard

Digital Speech Standard (DSS) is a proprietary compressed digital audio file format defined by the International Voice Association, a co-operative venture by Olympus, Philips and Grundig.

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Digital Video Broadcasting

Digital Video Broadcasting (DVB) is a set of internationally open standards for digital television.

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Digital Video Interactive

Digital Video Interactive (DVI) was the first multimedia desktop video standard for IBM-compatible personal computers.

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Dirac (video compression format)

Dirac is an open and royalty-free video compression format, specification and system developed by BBC Research & Development.

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DirectDraw Surface

The DirectDraw Surface container file format (uses the filename extension DDS), is a Microsoft format for storing data compressed with the proprietary S3 Texture Compression (S3TC) algorithm, which can be decompressed in hardware by GPUs.

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Dissolve (filmmaking)

In the post-production process of film editing and video editing, a dissolve is a gradual transition from one image to another.

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DNxHR codec

Avid DNxHR, which stands for "Digital Nonlinear Extensible High Resolution", is a lossy UHDTV post-production codec engineered for multi-generation compositing with reduced storage and bandwidth requirements.

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Dolby Digital

Dolby Digital is the name for audio compression technologies developed by Dolby Laboratories.

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Dolby Digital Plus

Dolby Digital Plus, also known as Enhanced AC-3 (and commonly abbreviated as DD+ or E-AC-3, or EC-3) is a digital audio compression scheme developed by Dolby Labs for transport and storage of multi-channel digital audio.

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Dolby Laboratories

Dolby Laboratories, Inc. (often shortened to Dolby Labs) is a British-American company specializing in audio noise reduction and audio encoding/compression.

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Dolby TrueHD

Dolby TrueHD is a lossless multi-channel audio codec developed by Dolby Laboratories which is used in home-entertainment equipment such as Blu-ray Disc players and A/V receivers.

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DSP Group

DSP Group, Inc. is a provider of chipsets for VoIP, multimedia, and digital cordless applications.

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DTS (sound system)

DTS (Dedicated To Sound) is a series of multichannel audio technologies owned by Xperi Corporation (formerly known as Digital Theater Systems, Inc.), an American company specializing in digital surround sound formats used for both commercial/theatrical and consumer grade applications.

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DTS-HD Master Audio

DTS-HD Master Audio (DTS-HD MA) is a combined lossless/lossy audio codec created by DTS (formerly Digital Theater Systems), commonly used for surround-sound movie soundtracks on Blu-ray Disc.

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DV

DV is a format for storing digital video.

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DVD Forum

The DVD Forum is an international organization composed of hardware, software, media and production companies that use and develop the DVD and formerly HD DVD formats.

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Dynamic Adaptive Streaming over HTTP

Dynamic Adaptive Streaming over HTTP (DASH), also known as MPEG-DASH, is an adaptive bitrate streaming technique that enables high quality streaming of media content over the Internet delivered from conventional HTTP web servers.

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Dynamic range compression

Dynamic range compression (DRC) or simply compression is an audio signal processing operation that reduces the volume of loud sounds or amplifies quiet sounds thus reducing or compressing an audio signal's dynamic range.

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Edge detection

Edge detection includes a variety of mathematical methods that aim at identifying points in a digital image at which the image brightness changes sharply or, more formally, has discontinuities.

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Editing

Editing is the process of selecting and preparing written, visual, audible, and film media used to convey information.

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EIA-608

EIA-608, also known as "line 21 captions" and "CEA-608", used to be the standard for closed captioning for NTSC TV broadcasts in the United States, Canada and Mexico.

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Electronic Industries Alliance

The Electronic Industries Alliance (EIA; until 1997 Electronic Industries Association) was a standards and trade organization composed as an alliance of trade associations for electronics manufacturers in the United States.

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Electronic mixer

An electronic mixer is a device that combines two or more electrical or electronic signals into one or two composite output signals.

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Emphasis (telecommunications)

Typically, prior to some process, such as transmission over cable, or recording to phonograph record or tape, the input frequency range most susceptible to noise is boosted.

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Enhanced Variable Rate Codec

Enhanced Variable Rate CODEC (EVRC) is a speech codec used in CDMA networks.

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Entropy encoding

In information theory an entropy encoding is a lossless data compression scheme that is independent of the specific characteristics of the medium.

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Equalization (audio)

Equalization or equalisation is the process of adjusting the balance between frequency components within an electronic signal.

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ETSI

The European Telecommunications Standards Institute (ETSI) is an independent, not-for-profit, standardization organization in the telecommunications industry (equipment makers and network operators) in Europe, headquartered in Sophia-Antipolis, France, with worldwide projection.

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European Union

The European Union (EU) is a political and economic union of EUnum member states that are located primarily in Europe.

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Eval

In some programming languages, eval is a function which evaluates a string as though it were an expression and returns a result; in others, it executes multiple lines of code as though they had been included instead of the line including the eval.

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FAAC

FAAC or Freeware Advanced Audio Coder is a software project which includes the AAC encoder FAAC and decoder FAAD2.

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Fabrice Bellard

Fabrice Bellard is a computer programmer who is best known as the creator of the FFmpeg and QEMU software projects.

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Fade (audio engineering)

In audio engineering, a fade is a gradual increase or decrease in the level of an audio signal.

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Fax

Fax (short for facsimile), sometimes called telecopying or telefax (the latter short for telefacsimile), is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device.

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Ffdshow

ffdshow is a codec mainly used for decoding of video in the MPEG-4 ASP (e.g. encoded with DivX or Xvid) and H.264/MPEG-4 AVC video formats, but it supports numerous other video and audio formats as well.

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FFV1

FFV1, which stands for "FF video codec 1", is a lossless intra-frame video codec.

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File Transfer Protocol

The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.

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Finite impulse response

In signal processing, a finite impulse response (FIR) filter is a filter whose impulse response (or response to any finite length input) is of finite duration, because it settles to zero in finite time.

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FLAC

FLAC (Free Lossless Audio Codec) is an audio coding format for lossless compression of digital audio, and is also the name of the free software project producing the FLAC tools, the reference software package that includes a codec implementation.

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Flanging

Flanging is an audio effect produced by mixing two identical signals together, one signal delayed by a small and gradually changing period, usually smaller than 20 milliseconds.

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Flash Video

Flash Video is a container file format used to deliver digital video content (e.g., TV shows, movies, etc.) over the Internet using Adobe Flash Player version 6 and newer.

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FLIC (file format)

The FLIC file formats most known in the extension.FLI and.FLC, used to store animation files.

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Floating-point arithmetic

In computing, floating-point arithmetic is arithmetic using formulaic representation of real numbers as an approximation so as to support a trade-off between range and precision.

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Fraunhofer FDK AAC

Fraunhofer FDK AAC (Full title Fraunhofer FDK AAC Codec Library for Android) is an open-source software library for encoding and decoding Advanced Audio Coding (AAC) format audio, developed by Fraunhofer IIS, and included as part of Android.

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Free software

Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions.

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Frequency domain

In electronics, control systems engineering, and statistics, the frequency domain refers to the analysis of mathematical functions or signals with respect to frequency, rather than time.

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Front and back ends

In software engineering, the terms front end and back end refer to the separation of concerns between the presentation layer (front end), and the data access layer (back end) of a piece of software, or the physical infrastructure or hardware.

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Full Rate

Full Rate (FR or GSM-FR or GSM 06.10 or sometimes simply GSM) was the first digital speech coding standard used in the GSM digital mobile phone system.

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Fuzzing

Fuzzing or fuzz testing is an automated software testing technique that involves providing invalid, unexpected, or random data as inputs to a computer program.

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G.711

G.711 is an ITU-T standard for audio companding.

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G.722

G.722 is an ITU-T standard 7 kHz Wideband audio codec operating at 48, 56 and 64 kbit/s.

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G.723

G.723 is an ITU-T standard speech codec using extensions of G.721 providing voice quality covering 300 Hz to 3400 Hz using Adaptive Differential Pulse Code Modulation (ADPCM) to 24 and 40 kbit/s for digital circuit multiplication equipment (DCME) applications.

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G.723.1

G.723.1 is an audio codec for voice that compresses voice audio in 30 ms frames.

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G.726

G.726 is an ITU-T ADPCM speech codec standard covering the transmission of voice at rates of 16, 24, 32, and 40 kbit/s.

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G.729

G.729 is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length of 10 milliseconds.

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Gaussian blur

In image processing, a Gaussian blur (also known as Gaussian smoothing) is the result of blurring an image by a Gaussian function (named after mathematician and scientist Carl Friedrich Gauss).

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General Exchange Format

General eXchange Format (GXF), is a file exchange format for the transfer of simple and compound clips between television program storage systems.

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GIF

The Graphics Interchange Format, better known by its acronym GIF, is a bitmap image format that was developed by a team at the bulletin board service (BBS) provider CompuServe led by American computer scientist Steve Wilhite on June 15, 1987.

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Git

Git is a version control system for tracking changes in computer files and coordinating work on those files among multiple people.

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GitHub

GitHub Inc. is a web-based hosting service for version control using Git.

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Global IP Solutions

Global IP Solutions (also known as GIPS) was a United States-based corporation that developed real-time voice and video processing software for IP networks, before it was acquired by Google in May 2010.

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GNU General Public License

The GNU General Public License (GNU GPL or GPL) is a widely used free software license, which guarantees end users the freedom to run, study, share and modify the software.

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GNU Lesser General Public License

The GNU Lesser General Public License (LGPL) is a free software license published by the Free Software Foundation (FSF).

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Google

Google LLC is an American multinational technology company that specializes in Internet-related services and products, which include online advertising technologies, search engine, cloud computing, software, and hardware.

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Google Chrome

Google Chrome is a freeware web browser developed by Google LLC.

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Gopher (protocol)

The Gopher protocol is a TCP/IP application layer protocol designed for distributing, searching, and retrieving documents over the Internet.

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Graphical user interface

The graphical user interface (GUI), is a type of user interface that allows users to interact with electronic devices through graphical icons and visual indicators such as secondary notation, instead of text-based user interfaces, typed command labels or text navigation.

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Grass Valley (company)

Grass Valley (formerly known as Thomson Grass Valley and Grass Valley Group) is a Canadian manufacturer of television production and broadcasting equipment, including playout, video cameras, editing and media storage, and character generators.

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Grayscale

In photography, computing, and colorimetry, a grayscale or greyscale image is one in which the value of each pixel is a single sample representing only an amount of light, that is, it carries only intensity information.

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Group 4 compression

CCITT Group 4 compression, also referred to as G4 or Modified Modified READ (MMR), is a lossless method of image compression used in Group 4 fax machines defined in the ITU-T T.6 fax standard.

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GStreamer

GStreamer is a pipeline-based multimedia framework that links together a wide variety of media processing systems to complete complex workflows.

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H.261

H.261 is an ITU-T video compression standard, first ratified in November 1988.

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H.262/MPEG-2 Part 2

H.262 or MPEG-2 Part 2 (formally known as ITU-T Recommendation H.262 and ISO/IEC 13818-2, also known as MPEG-2 Video) is a video coding format developed and maintained jointly by ITU-T Video Coding Experts Group (VCEG) and ISO/IEC Moving Picture Experts Group (MPEG).

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H.263

H.263 is a video compression standard originally designed as a low-bit-rate compressed format for videoconferencing.

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H.264/MPEG-4 AVC

H.264 or MPEG-4 Part 10, Advanced Video Coding (MPEG-4 AVC) is a block-oriented motion-compensation-based video compression standard.

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HandBrake

HandBrake is a free and open-source transcoder for digital video files, originally developed in 2003 by Eric Petit (a.k.a. "titer" from his SVN repository username) to make ripping a film from a DVD to a data storage device easier.

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Headphones

Headphones (or head-phones in the early days of telephony and radio) are a pair of small loudspeaker drivers worn on or around the head over a user's ears.

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High color

High color graphics (variously spelled Highcolor, Hicolor, Hi-color, Hicolour, and Highcolour, and known as Thousands of colors on a Macintosh) is a method of storing image information in a computer's memory such that each pixel is represented by two bytes.

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High Definition Compatible Digital

High Definition Compatible Digital, or HDCD is a Microsoft proprietary audio encode-decode process that claims to provide increased dynamic range over that of standard Redbook audio CDs, while retaining backward compatibility with existing Compact disc players.

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High Efficiency Video Coding

High Efficiency Video Coding (HEVC), also known as H.265 and MPEG-H Part 2, is a video compression standard, one of several potential successors to the widely used AVC (H.264 or MPEG-4 Part 10).

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High-Efficiency Advanced Audio Coding

High-Efficiency Advanced Audio Coding (HE-AAC) is an audio coding format for lossy data compression of digital audio defined as an MPEG-4 Audio profile in ISO/IEC 14496-3.

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High-pass filter

A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency.

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HMAC

In cryptography, an HMAC (sometimes disabbreviated as either keyed-hash message authentication code or hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptographic hash function and a secret cryptographic key.

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HTTP Live Streaming

HTTP Live Streaming (also known as HLS) is an HTTP-based media streaming communications protocol implemented by Apple Inc. as part of its QuickTime, Safari, OS X, and iOS software.

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HTTPS

HTTP Secure (HTTPS) is an extension of the Hypertext Transfer Protocol (HTTP) for secure communication over a computer network, and is widely used on the Internet.

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Hypertext Transfer Protocol

The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, and hypermedia information systems.

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IA-32

IA-32 (short for "Intel Architecture, 32-bit", sometimes also called i386) is the 32-bit version of the x86 instruction set architecture, first implemented in the Intel 80386 microprocessors in 1985.

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IBM

The International Business Machines Corporation (IBM) is an American multinational technology company headquartered in Armonk, New York, United States, with operations in over 170 countries.

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Icecast

Icecast is a streaming media project released as free software maintained by the Xiph.org Foundation.

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Image scaling

In computer graphics and digital imaging, image scaling refers to the resizing of a digital image.

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Image stabilization

Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure.

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Indeo

Indeo Video (commonly known now simply as "Indeo") is a video codec developed by Intel in 1992.

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Indexed color

In computing, indexed color is a technique to manage digital images' colors in a limited fashion, in order to save computer memory and file storage, while speeding up display refresh and file transfers.

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Industrial Light & Magic

Industrial Light & Magic (ILM) is an American motion picture visual effects company that was founded in May 1975 by George Lucas.

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Infinite impulse response

Infinite impulse response (IIR) is a property applying to many linear time-invariant systems.

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Instruction set architecture

An instruction set architecture (ISA) is an abstract model of a computer.

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Intel Clear Video

Intel Clear Video is a semiconductor intellectual property core which implements some steps of some video decompression algorithms.

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Intel Quick Sync Video

Intel Quick Sync Video is Intel's brand for its dedicated video encoding and decoding hardware core.

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Interactive Multimedia Association

The Interactive Multimedia Association (IMA) was an industry association which developed a set of audio algorithms.

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Interchange File Format

Interchange File Format (IFF), is a generic container file format originally introduced by the Electronic Arts company in 1985 (in cooperation with Commodore/Amiga) in order to facilitate transfer of data between software produced by different companies.

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International Electrotechnical Commission

The International Electrotechnical Commission (IEC; in French: Commission électrotechnique internationale) is an international standards organization that prepares and publishes International Standards for all electrical, electronic and related technologies – collectively known as "electrotechnology".

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International Organization for Standardization

The International Organization for Standardization (ISO) is an international standard-setting body composed of representatives from various national standards organizations.

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International Telecommunication Union

The International Telecommunication Union (ITU; Union Internationale des Télécommunications (UIT)), originally the International Telegraph Union (Union Télégraphique Internationale), is a specialized agency of the United Nations (UN) that is responsible for issues that concern information and communication technologies.

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Internet Draft

An Internet Draft (I-D) is a document published by the Internet Engineering Task Force (IETF) containing preliminary technical specifications, results of networking-related research, or other technical information.

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Internet Engineering Task Force

The Internet Engineering Task Force (IETF) develops and promotes voluntary Internet standards, in particular the standards that comprise the Internet protocol suite (TCP/IP).

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Internet Low Bitrate Codec

Internet Low Bitrate Codec (iLBC) is an open source royalty-free narrowband speech audio coding format codec and reference implementation, developed by Global IP Solutions (GIPS) formerly Global IP Sound (acquired by Google Inc in 2011).

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ISO base media file format

ISO base media file format (ISO/IEC 14496-12 – MPEG-4 Part 12) defines a general structure for time-based multimedia files such as video and audio.

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ITU-T

The ITU Telecommunication Standardization Sector (ITU-T) is one of the three sectors (divisions or units) of the International Telecommunication Union (ITU); it coordinates standards for telecommunications.

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ITunes

iTunes is a media player, media library, Internet radio broadcaster, and mobile device management application developed by Apple Inc. It was announced on January 9, 2001.

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Java (programming language)

Java is a general-purpose computer-programming language that is concurrent, class-based, object-oriented, and specifically designed to have as few implementation dependencies as possible.

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JPEG

JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography.

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JPEG 2000

JPEG 2000 (JP2) is an image compression standard and coding system.

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JSON

In computing, JavaScript Object Notation or JSON ("Jason") is an open-standard file format that uses human-readable text to transmit data objects consisting of attribute–value pairs and array data types (or any other serializable value).

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Kodi (software)

Kodi (formerly XBMC) is a free and open-source media player software application developed by the XBMC Foundation, a non-profit technology consortium.

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LADSPA

LADSPA is an acronym for Linux Audio Developer's Simple Plugin API.

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Launchpad (website)

Launchpad is a web application and website that allows users to develop and maintain software, particularly open-source software.

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Lempel–Ziv–Oberhumer

Lempel–Ziv–Oberhumer (LZO) is a lossless data compression algorithm that is focused on decompression speed.

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Libav

Libav is a free software project, forked from FFmpeg in 2011, that produces libraries and programs for handling multimedia data.

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Libavcodec

libavcodec is a free and open-source library of codecs for encoding and decoding video and audio data.

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Library (computing)

In computer science, a library is a collection of non-volatile resources used by computer programs, often for software development.

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Libvpx

libvpx is a free software video codec library from Google and the Alliance for Open Media (AOMedia).

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Limiter

In electronics, a limiter is a circuit that allows signals below a specified input power or level to pass unaffected while attenuating (lowering) the peaks of stronger signals that exceed this threshold.

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Linux

Linux is a family of free and open-source software operating systems built around the Linux kernel.

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List of open-source codecs

This is a listing of open-source implementations of media formats—usually called codecs.

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Lossless JPEG

Lossless JPEG is a 1993 addition to JPEG standard by the Joint Photographic Experts Group to enable lossless compression.

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Low-pass filter

A low-pass filter (LPF) is a filter that passes signals with a frequency lower than a certain cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency.

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Lucasfilm

Lucasfilm Ltd.

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LV2

LV2, an acronym for Linux Audio Developer's Simple Plugin API (LADSPA) version 2, is an open standard for audio plug-ins and matching host applications.

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MacOS

macOS (previously and later) is a series of graphical operating systems developed and marketed by Apple Inc. since 2001.

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Material Exchange Format

Material eXchange Format (MXF) is a container format for professional digital video and audio media defined by a set of SMPTE standards.

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Matroska

The Matroska Multimedia Container is an open standard, free container format, a file format that can hold an unlimited number of video, audio, picture, or subtitle tracks in one file.

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Matrox

Matrox is a producer of video card components and equipment for personal computers.

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MD5

The MD5 algorithm is a widely used hash function producing a 128-bit hash value.

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Media Player Classic

Media Player Classic (MPC) is a compact media player for 32-bit and 64-bit Microsoft Windows.

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MediaInfo

MediaInfo is a free and open-source program that displays technical information about media files, as well as tag information for many audio and video files.

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Meh

Meh is an interjection used as an expression of indifference or boredom.

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MEncoder

MEncoder is a free command line transcoding tool released under the GNU General Public License.

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Meridian Lossless Packing

Meridian Lossless Packing, also known as Packed PCM (PPCM), is a lossless compression technique for compressing PCM audio data developed by Meridian Audio, Ltd..

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Microsoft

Microsoft Corporation (abbreviated as MS) is an American multinational technology company with headquarters in Redmond, Washington.

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Microsoft Media Server

Microsoft Media Server (MMS), a Microsoft proprietary network-streaming protocol, serves to transfer unicast data in Windows Media Services (previously called NetShow Services).

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Microsoft Open Specification Promise

The Microsoft Open Specification Promise (or OSP) is a promise by Microsoft, published in September 2006, to not assert its patents, in certain conditions, against implementations of a certain list of specifications.

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Microsoft Video 1

Microsoft Video 1 or MS-CRAM is an early lossy video compression and decompression algorithm (codec) that was released with version 1.0 of Microsoft's Video for Windows in November 1992.

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Microsoft Windows

Microsoft Windows is a group of several graphical operating system families, all of which are developed, marketed, and sold by Microsoft.

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MIPS architecture

MIPS (an acronym for Microprocessor without Interlocked Pipeline Stages) is a reduced instruction set computer (RISC) instruction set architecture (ISA)Price, Charles (September 1995).

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Monochrome

Monochrome describes paintings, drawings, design, or photographs in one color or values of one color.

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Motion interpolation

Motion interpolation or motion-compensated frame interpolation (MCFI) is a form of video processing in which intermediate animation frames are generated between existing ones by means of interpolation, in an attempt to make animation more fluid and to compensate for display motion blur.

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Motion JPEG

In multimedia, Motion JPEG (M-JPEG or MJPEG) is a video compression format in which each video frame or interlaced field of a digital video sequence is compressed separately as a JPEG image.

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Moving Picture Experts Group

The Moving Picture Experts Group (MPEG) is a working group of authorities that was formed by ISO and IEC to set standards for audio and video compression and transmission.

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Mozilla Corporation

The Mozilla Corporation (stylized as moz://a) is a wholly owned subsidiary of the Mozilla Foundation that coordinates and integrates the development of Internet-related applications such as the Firefox web browser, SeaMonkey Internet suite, and the Mozilla Thunderbird email client by a global community of open-source developers, some of whom are employed by the corporation itself.

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MP3

MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is an audio coding format for digital audio.

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MPEG program stream

Program stream (PS or MPEG-PS) is a container format for multiplexing digital audio, video and more.

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MPEG transport stream

MPEG transport stream (transport stream, MPEG-TS, MTS or TS) is a standard digital container format for transmission and storage of audio, video, and Program and System Information Protocol (PSIP) data.

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MPEG-1

MPEG-1 is a standard for lossy compression of video and audio.

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MPEG-1 Audio Layer I

MPEG-1 Audio Layer I, commonly abbreviated to MP1, is one of three audio formats included in the MPEG-1 standard.

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MPEG-1 Audio Layer II

MPEG-1 Audio Layer II or MPEG-2 Audio Layer II (MP2, sometimes incorrectly called Musicam or MUSICAM) is a lossy audio compression format defined by ISO/IEC 11172-3 alongside MPEG-1 Audio Layer I and MPEG-1 Audio Layer III (MP3).

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MPEG-4 Part 14

MPEG-4 Part 14 or MP4 is a digital multimedia container format most commonly used to store video and audio, but it can also be used to store other data such as subtitles and still images.

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MPEG-4 Part 17

MPEG-4 Part 17, or MPEG-4 Timed Text, or MPEG-4 Streaming text format is the text-based subtitle format for MPEG-4, published as ISO/IEC 14496-17 in 2006.

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MPEG-4 Part 2

MPEG-4 Part 2, MPEG-4 Visual (formally ISO/IEC 14496-2) is a video compression format developed by MPEG.

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MPlayer

MPlayer is a free and open media player software.

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Multimedia

Multimedia is content that uses a combination of different content forms such as text, audio, images, animations, video and interactive content.

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Multimedia framework

A multimedia framework is a Software framework that handles media on a computer and through a network.

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Multiplexing

In telecommunications and computer networks, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium.

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MurmurHash

MurmurHash is a non-cryptographic hash function suitable for general hash-based lookup.

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MythTV

MythTV is a free and open-source home entertainment application with a simplified "10-foot user interface" design for the living-room TV.

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Netpbm

Netpbm is an open-source package of graphics programs and a programming library.

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Netpbm format

A Netpbm format is any graphics format used and defined by the Netpbm project.

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NewTek

NewTek, Inc. is a San Antonio, Texas–based hardware and software company that produces live and post-production video tools and visual imaging software for personal computers.

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Nippon Telegraph and Telephone

, commonly known as NTT, is a Japanese telecommunications company headquartered in Tokyo, Japan.

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Noise gate

A noise gate or gate is an electronic device or software that is used to control the volume of an audio signal.

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Noise reduction

Noise reduction is the process of removing noise from a signal.

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Nvidia NVENC

Nvidia NVENC is a feature in its graphics cards that performs video encoding, offloading this compute-intensive task from the CPU.

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Nvidia PureVideo

PureVideo is Nvidia's hardware SIP core that performs video decoding.

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Ogg

Ogg is a free, open container format maintained by the Xiph.Org Foundation.

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On2 Technologies

On2 Technologies, formerly known as The Duck Corporation, was a small publicly traded company (on the American Stock Exchange), founded in New York City in 1992 and headquartered in Clifton Park, New York, that designed video codec technology.

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OpenCV

OpenCV (Open Source Computer Vision) is a library of programming functions mainly aimed at real-time computer vision.

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OpenEXR

OpenEXR is a high dynamic range raster file format, released as an open standard along with a set of software tools created by Industrial Light and Magic (ILM), under a free software license similar to the BSD license.

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OpenMG

OpenMG is a SDMI-compliant digital rights management system by Sony.

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Optical character recognition

Optical character recognition (also optical character reader, OCR) is the mechanical or electronic conversion of images of typed, handwritten or printed text into machine-encoded text, whether from a scanned document, a photo of a document, a scene-photo (for example the text on signs and billboards in a landscape photo) or from subtitle text superimposed on an image (for example from a television broadcast).

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Opus (audio format)

Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors.

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Oracle Corporation

Oracle Corporation is an American multinational computer technology corporation, headquartered in Redwood Shores, California.

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Packed pixel

In packed pixel or chunky framebuffer organization, the bits defining each pixel are grouped together.

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Panning (audio)

Panning is the distribution of a sound signal (either monaural or stereophonic pairs) into a new stereo or multi-channel sound field determined by a pan control setting.

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Peak signal-to-noise ratio

Peak signal-to-noise ratio, often abbreviated PSNR, is an engineering term for the ratio between the maximum possible power of a signal and the power of corrupting noise that affects the fidelity of its representation.

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Perian

Perian is a discontinued open source QuickTime component that enabled Apple Inc.’s QuickTime to play several popular video formats not supported natively by QuickTime on macOS.

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Phase modulation

Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission.

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Phaser (effect)

A phaser is an electronic sound processor used to filter a signal by creating a series of peaks and troughs in the frequency spectrum.

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Pixlet

Pixlet is a video codec created by Apple and based on wavelets, designed to enable viewing of full resolution, HD movies in real time at low DV data rates.

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Planar (computer graphics)

In computer graphics, planar is the method of representing pixel colors with several bitplanes of RAM.

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Plex (software)

Plex is a client-server media player system and software suite comprising two main components.

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Portable Network Graphics

Portable Network Graphics (PNG, pronounced or) is a raster graphics file format that supports lossless data compression.

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Post-production

Post-production is part of the process of filmmaking, video production, and photography.

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PowerPC

PowerPC (with the backronym Performance Optimization With Enhanced RISC – Performance Computing, sometimes abbreviated as PPC) is a reduced instruction set computing (RISC) instruction set architecture (ISA) created by the 1991 Apple–IBM–Motorola alliance, known as AIM.

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Presentation timestamp

The presentation timestamp (PTS) is a timestamp metadata field in an MPEG transport stream or MPEG program stream that is used to achieve synchronization of programs' separate elementary streams (for example Video, Audio, Subtitles) when presented to the viewer.

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Prewitt operator

The Prewitt operator is used in image processing, particularly within edge detection algorithms.

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Pseudonym

A pseudonym or alias is a name that a person or group assumes for a particular purpose, which can differ from their first or true name (orthonym).

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QDesign

QDesign Corporation was a developer of digital audio compression technologies.

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Qualcomm code-excited linear prediction

Qualcomm code-excited linear prediction (QCELP), also known as Qualcomm PureVoice, is a speech codec developed in 1994 by Qualcomm to increase the speech quality of the IS-96A codec earlier used in CDMA networks.

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QuickTime Animation

QuickTime Animation format (also known as QuickTime RLE) is a video compression format and codec created by Apple Computer to enable playback of RGB video in real time without expensive hardware.

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QuickTime File Format

QuickTime File Format (QTFF) is a computer file format used natively by the QuickTime framework.

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QuickTime Graphics

QuickTime Graphics is a lossy video compression and decompression algorithm (codec) developed by Apple Inc. and first released as part of QuickTime 1.x in the early 1990s.

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RC4

In cryptography, RC4 (Rivest Cipher 4 also known as ARC4 or ARCFOUR meaning Alleged RC4, see below) is a stream cipher.

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Real Data Transport

Real Data Transport (RDT) is a proprietary transport protocol for the actual audio-video data, developed by RealNetworks in the 1990s.

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Real Time Streaming Protocol

The Real Time Streaming Protocol (RTSP) is a network control protocol designed for use in entertainment and communications systems to control streaming media servers.

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Real-Time Messaging Protocol

Real-Time Messaging Protocol (RTMP) was initially a proprietary protocol developed by Macromedia for streaming audio, video and data over the Internet, between a Flash player and a server.

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Real-time Transport Protocol

The Real-time Transport Protocol (RTP) is a network protocol for delivering audio and video over IP networks.

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RealAudio

RealAudio is a proprietary audio format developed by RealNetworks and first released in April 1995.

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RealNetworks

RealNetworks, Inc. is a provider of Internet streaming media delivery software and services based in Seattle, Washington, United States.

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RealVideo

RealVideo is a suite of proprietary video compression formats developed by RealNetworks – the specific format changes with the version.

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RenderWare

RenderWare is a game engine developed by the British game developer Criterion Software.

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ReplayGain

ReplayGain is a proposed standard published by David Robinson in 2001 to measure the perceived loudness of audio in computer audio formats such as MP3 and Ogg Vorbis.

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Request for Comments

In information and communications technology, a Request for Comments (RFC) is a type of publication from the technology community.

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RGB color model

The RGB color model is an additive color model in which red, green and blue light are added together in various ways to reproduce a broad array of colors.

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RGBA color space

RGBA stands for red green blue alpha.

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RGBE image format

RGBE or Radiance HDR is an image format invented by Gregory Ward Larson for the Radiance rendering system.

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RIPEMD

RIPEMD (RACE Integrity Primitives Evaluation Message Digest) is a family of cryptographic hash functions developed in Leuven, Belgium, by Hans Dobbertin, Antoon Bosselaers and Bart Preneel at the COSIC research group at the Katholieke Universiteit Leuven, and first published in 1996.

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RTMPDump

RTMPDump is a free software project dedicated to develop a toolkit for RTMP streams.

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Run-length encoding

Run-length encoding (RLE) is a very simple form of lossless data compression in which runs of data (that is, sequences in which the same data value occurs in many consecutive data elements) are stored as a single data value and count, rather than as the original run.

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SAMI

SAMI (Synchronized Accessible Media Interchange) is a Microsoft accessibility initiative released in 1998.

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Sample-rate conversion

Sample-rate conversion is the process of changing the sampling rate of a discrete signal to obtain a new discrete representation of the underlying continuous signal.

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Secure Real-time Transport Protocol

The Secure Real-time Transport Protocol (SRTP) is a Real-time Transport Protocol (RTP) profile, intended to provide encryption, message authentication and integrity, and replay attack protection to the RTP data in both unicast and multicast applications.

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Server Message Block

In computer networking, Server Message Block (SMB), one version of which was also known as Common Internet File System (CIFS), operates as an application-layer network protocol mainly used for providing shared access to files, printers, and serial ports and miscellaneous communications between nodes on a network.

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Session Description Protocol

The Session Description Protocol (SDP) is a format for describing streaming media communications parameters.

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SHA-1

In cryptography, SHA-1 (Secure Hash Algorithm 1) is a cryptographic hash function which takes an input and produces a 160-bit (20-byte) hash value known as a message digest - typically rendered as a hexadecimal number, 40 digits long.

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SHA-2

SHA-2 (Secure Hash Algorithm 2) is a set of cryptographic hash functions designed by the United States National Security Agency (NSA).

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Silicon Graphics

Silicon Graphics, Inc. (later rebranded SGI, historically known as Silicon Graphics Computer Systems or SGCS) was an American high-performance computing manufacturer, producing computer hardware and software.

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Silicon Graphics Image

Silicon Graphics Image (SGI) or the RGB file format is the native raster graphics file format for Silicon Graphics workstations.

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SimCity 3000

SimCity 3000 is a city building simulation video game released in 1999, and the third major installment in the ''SimCity'' series.

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Simple DirectMedia Layer

Simple DirectMedia Layer (SDL) is a cross-platform software development library designed to provide a hardware abstraction layer for computer multimedia hardware components.

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Smacker video

Smacker video is a video file format (with the.SMK file extension) developed by RAD Game Tools, and primarily used for full-motion video in video games.

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Snappy (package manager)

Snappy is a software deployment and package management system originally designed and built by Canonical for the Ubuntu phone operating system.

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Sobel operator

The Sobel operator, sometimes called the Sobel–Feldman operator or Sobel filter, is used in image processing and computer vision, particularly within edge detection algorithms where it creates an image emphasising edges.

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Society of Motion Picture and Television Engineers

The Society of Motion Picture and Television Engineers (SMPTE) (rarely), founded in 1916 as the Society of Motion Picture Engineers or SMPE, is a global professional association, of engineers, technologists, and executives working in the media and entertainment industry.

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Softpedia

Softpedia is a website from Romania that indexes information and provides primarily software information and downloads.

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Software patent

A software patent is a patent on a piece of software, such as a computer program, libraries, user interface, or algorithm.

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Sony

is a Japanese multinational conglomerate corporation headquartered in Kōnan, Minato, Tokyo.

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Sorenson Media

Sorenson Media is an American software company specializing in video encoding technology.

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Source code

In computing, source code is any collection of code, possibly with comments, written using a human-readable programming language, usually as plain text.

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SPARC

SPARC, for Scalable Processor Architecture, is a reduced instruction set computing (RISC) instruction set architecture (ISA) originally developed by Sun Microsystems.

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Speex

Speex is an audio compression format specifically tuned for the reproduction of human speech and also a free software speech codec that may be used on VoIP applications and podcasts.

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SSH File Transfer Protocol

In computing, the SSH File Transfer Protocol (also Secure File Transfer Protocol, or SFTP) is a network protocol that provides file access, file transfer, and file management over any reliable data stream.

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Standardization Administration of China

The Standardization Administration of the People's Republic of China (SAC) is the standards organization authorized by the State Council of China to exercise administrative responsibilities by undertaking unified management, supervision and overall coordination of standardization work in China.

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Stream Control Transmission Protocol

The Stream Control Transmission Protocol (SCTP) is a computer networking communications protocol which operates at the transport layer and serves a role similar to the popular protocols TCP and UDP.

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Structural similarity

The structural similarity (SSIM) index is a method for predicting the perceived quality of digital television and cinematic pictures, as well as other kinds of digital images and videos.

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SubStation Alpha

SubStation Alpha (or Sub Station Alpha), abbreviated SSA, is a subtitle file format created by CS Low (also known as Kotus) that allows for more advanced subtitles than the conventional SRT and similar formats.

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Subtitle (captioning)

Subtitles are text derived from either a transcript or screenplay of the dialog or commentary in films, television programs, video games, and the like, usually displayed at the bottom of the screen, but can also be at the top of the screen if there is already text at the bottom of the screen.

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Sun Microsystems

Sun Microsystems, Inc. was an American company that sold computers, computer components, software, and information technology services and created the Java programming language, the Solaris operating system, ZFS, the Network File System (NFS), and SPARC.

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Sun Raster

Sun Raster was a raster graphics file format used on SunOS by Sun Microsystems.

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The Open Group

The Open Group is an industry consortium that seeks to "enable the achievement of business objectives" by developing "open, vendor-neutral technology standards and certifications".

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Theora

Theora is a free lossy video compression format.

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TIFF

Tagged Image File Format, abbreviated TIFF or TIF, is a computer file format for storing raster graphics images, popular among graphic artists, the publishing industry, and photographers.

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Time domain

Time domain is the analysis of mathematical functions, physical signals or time series of economic or environmental data, with respect to time.

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Tiny Encryption Algorithm

In cryptography, the Tiny Encryption Algorithm (TEA) is a block cipher notable for its simplicity of description and implementation, typically a few lines of code.

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Transcoding

Transcoding is the direct digital-to-digital conversion of one encoding to another, such as for movie data files (e.g., PAL, SECAM, NTSC), audio files (e.g., MP3, WAV), or character encoding (e.g., UTF-8, ISO/IEC 8859).

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Transmission Control Protocol

The Transmission Control Protocol (TCP) is one of the main protocols of the Internet protocol suite.

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Transport Layer Security

Transport Layer Security (TLS) – and its predecessor, Secure Sockets Layer (SSL), which is now deprecated by the Internet Engineering Task Force (IETF) – are cryptographic protocols that provide communications security over a computer network.

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Truespeech

Truespeech is a proprietary audio codec produced by the DSP Group.

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Truevision

Truevision, Inc. was a maker of digital video processing add-on boards for PC computers.

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Truevision TGA

Truevision TGA, often referred to as TARGA, is a raster graphics file format created by Truevision Inc. (now part of Avid Technology).

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TwinVQ

TwinVQ (transform-domain weighted interleave vector quantization) is an audio compression technique developed by Nippon Telegraph and Telephone Corporation (NTT) Human Interface Laboratories (now Cyber Space Laboratories) in 1994.

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Twofish

In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits.

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UDP-Lite

UDP-Lite (Lightweight User Datagram Protocol, sometimes UDP Lite) is a connectionless protocol that allows a potentially damaged data payload to be delivered to an application rather than being discarded by the receiving station.

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Unified Video Decoder

Unified Video Decoder (UVD), previously called Universal Video Decoder, is the name given to AMD's dedicated video decoding ASIC.

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Unsharp masking

Unsharp masking (USM) is an image sharpening technique, often available in digital image processing software.

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User Datagram Protocol

In computer networking, the User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite.

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VC-1

SMPTE 421M, informally known as VC-1, is a video coding format.

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VDPAU

Video Decode and Presentation API for Unix (VDPAU) is a royalty-free application programming interface (API) as well as its implementation as free and open-source library (libvdpau) distributed under the MIT License.

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Vectorscope

A vectorscope is a special type of oscilloscope used in both audio and video applications.

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Version control

A component of software configuration management, version control, also known as revision control or source control, is the management of changes to documents, computer programs, large web sites, and other collections of information.

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Video Acceleration API

Video Acceleration API (VA API) is a royalty-free API as well as its implementation as free and open-source library (libVA) distributed under the MIT License.

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Video Coding Engine

Video Coding Engine (VCE, sometimes incorrectly referred to as Video Codec Engine) is AMD's video encoding ASIC implementing the video codec H.264/MPEG-4 AVC.

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Video coding format

A video coding format (or sometimes video compression format) is a content representation format for storage or transmission of digital video content (such as in a data file or bitstream).

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Video post-processing

The term post-processing (or postproc for short) is used in the video/film business for quality-improvement image processing (specifically digital image processing) methods used in video playback devices, (such as stand-alone DVD-Video players), and video players software and transcoding software.

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Video scaler

A video scaler is a system which converts video signals from one display resolution to another; typically, scalers are used to convert a signal from a lower resolution (such as 480p standard definition) to a higher resolution (such as 1080i high definition), a process known as "upconversion" or "upscaling" (by contrast, converting from high to low resolution is known as "downconversion" or "downscaling").

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VideoLAN

VideoLAN is a non-profit organization (just a project name until 1999) which develops software for playing video and other media formats.

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VisualOn

VisualOn is a Silicon Valley-based multimedia software company that provides high-definition audio and video entertainment to smartphones, tablets, laptops, connected TVs and other mobile and convergent devices.

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VLC media player

VLC media player (commonly known as VLC) is a free and open-source, portable, cross-platform media player and streaming media server developed by the VideoLAN project.

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Vorbis

Vorbis is a free and open-source software project headed by the Xiph.Org Foundation.

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Voyeur (video game)

Voyeur is an interactive movie video game released in 1993 for the Philips CD-i. MS-DOS and Macintosh computer ports were later released.

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VP3

On2 TrueMotion VP3 is a (royalty-free) lossy video compression format and video codec.

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VP6

On2 TrueMotion VP6 is a proprietary lossy video compression format and video codec.

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VP8

VP8 is an open and royalty free video compression format owned by Google and created by On2 Technologies as a successor to VP7.

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VP9

VP9 is an open and royalty-free video coding format developed by Google.

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Waveform monitor

A waveform monitor is a special type of oscilloscope used in television production applications.

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WebM

WebM is an audiovisual media file format.

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WebP

WebP is an image format employing both lossy and lossless compression.

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WebVTT

WebVTT (Web Video Text Tracks) is a W3C standard for displaying timed text in connection with the HTML5 <track> element.

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Windows Media Audio

Windows Media Audio (WMA) is the name of a series of audio codecs and their corresponding audio coding formats developed by Microsoft.

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Windows Media Center

Windows Media Center (WMC) is a discontinued digital video recorder and media player created by Microsoft.

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Windows Media Video

Windows Media Video (WMV) is a series of video codecs and their corresponding video coding formats developed by Microsoft.

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World Wide Web Consortium

The World Wide Web Consortium (W3C) is the main international standards organization for the World Wide Web (abbreviated WWW or W3).

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X BitMap

In computer graphics, the X Window System used X BitMap (XBM), a plain text binary image format, for storing cursor and icon bitmaps used in the X GUI.

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X PixMap

X PixMap (XPM) is an image file format used by the X Window System, created in 1989 by Daniel Dardailler and Colas Nahaboo working at Bull Research Center at Sophia Antipolis, France, and later enhanced by Arnaud Le Hors.

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X86

x86 is a family of backward-compatible instruction set architectures based on the Intel 8086 CPU and its Intel 8088 variant.

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X86-64

x86-64 (also known as x64, x86_64, AMD64 and Intel 64) is the 64-bit version of the x86 instruction set.

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Xine

xine is a multimedia playback engine for Unix-like operating systems released under the GNU General Public License.

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Xiph.Org Foundation

Xiph.Org Foundation is a non-profit organization that produces free multimedia formats and software tools.

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XMedia Recode

XMedia Recode is a Freeware video and audio transcoding program for Microsoft Windows developed by Sebastian Dörfler.

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XML

In computing, Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable.

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XTEA

In cryptography, XTEA (eXtended TEA) is a block cipher designed to correct weaknesses in TEA.

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Xwd

In the X Window System, the program xwd (X Window dump) captures the content of a screen or of a window and optionally saves it into a file.

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YouTube

YouTube is an American video-sharing website headquartered in San Bruno, California.

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YUV

YUV is a color encoding system typically used as part of a color image pipeline.

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Zigzag

A zigzag is a pattern made up of small corners at variable angles, though constant within the zigzag, tracing a path between two parallel lines; it can be described as both jagged and fairly regular.

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3GP and 3G2

3GP (3GPP file format) is a multimedia container format defined by the Third Generation Partnership Project (3GPP) for 3G UMTS multimedia services.

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3GPP

The 3rd Generation Partnership Project (3GPP) is a collaboration between groups of telecommunications standards associations, known as the Organizational Partners.

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3rd Generation Partnership Project 2

The 3rd Generation Partnership Project 2 (3GPP2) is a collaboration between telecommunications associations to make a globally applicable third generation (3G) mobile phone system specification within the scope of the ITU's IMT-2000 project.

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8-bit color

8-bit color graphics is a method of storing image information in a computer's memory or in an image file, such that each pixel is represented by one 8-bit byte.

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Redirects here:

FFMPEG, FFMpeg, FFmpeg/Libav, FFplay, FMP4, Ffmpeg, Ffmpeg2theora, Ffmpeg2theora-0.27, Ffmpg, Ffplay, Ffserver, Ffvp8, LAV Filters, Lavf, Lavf55.25.101, Lavf57.25.100, Lavf57.83.100, Libavdevice, Libavfilter, Libavformat, Libavutil, Libpostproc, Snow (codec).

References

[1] https://en.wikipedia.org/wiki/FFmpeg

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