56 relations: Adaptive Multi-Rate Wideband, Algebraic code-excited linear prediction, Android (operating system), Audacity (audio editor), Audio coding format, Audio file format, BlackBerry, BlackBerry 10, Codec, Comfort noise, Comparison of audio coding formats, Data compression, Digital container format, Discontinuous transmission, Enhanced full rate, Ericsson, Extended Adaptive Multi-Rate – Wideband, Ffdshow, FFmpeg, Filename extension, Foobar2000, Forward error correction, Free software, Full Rate, G.711, G.729, GSM, Half Rate, IOS, IPhone, IS-641, K-Lite Codec Pack, Line spectral pairs, Linear predictive coding, Link adaptation, MacOS, Mean opinion score, MPlayer, Narrowband, Nippon Telegraph and Telephone, Nokia, Patent, Patent pool, PDC-EFR, PSQM, QuickTime, RealPlayer, RTP audio video profile, Sampling (signal processing), SMPlayer, ..., Speech coding, UMTS, VLC media player, Voice activity detection, 3GP and 3G2, 3GPP. Expand index (6 more) » « Shrink index
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).
Algebraic code-excited linear prediction (ACELP) is a patented speech coding algorithm by VoiceAge Corporation in which a limited set of pulses is distributed as excitation to a linear prediction filter.
Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software and designed primarily for touchscreen mobile devices such as smartphones and tablets.
Audacity is a free and open-source digital audio editor and recording application software, available for Windows, macOS/OS X and Unix-like operating systems.
An audio coding format (or sometimes audio compression format) is a content representation format for storage or transmission of digital audio (such as in digital television, digital radio and in audio and video files).
An audio file format is a file format for storing digital audio data on a computer system.
BlackBerry is a line of smartphones, tablets, and services originally designed and marketed by Canadian company BlackBerry Limited (formerly known as Research In Motion, or RIM).
BlackBerry 10 is a proprietary mobile operating system for the BlackBerry line of smartphones, both developed by BlackBerry Limited (formerly Research In Motion).
A codec is a device or computer program for encoding or decoding a digital data stream or signal.
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.
The following tables compare general and technical information for a variety of audio coding formats.
In signal processing, data compression, source coding, or bit-rate reduction involves encoding information using fewer bits than the original representation.
A container or wrapper format is a metafile format whose specification describes how different elements of data and metadata coexist in a computer file.
Discontinuous transmission (DTX) is a means by which a mobile telephone is temporarily shut off or muted while the phone lacks a voice input.
Enhanced Full Rate or EFR or GSM-EFR or GSM 06.60 is a speech coding standard that was developed in order to improve the quite poor quality of GSM-Full Rate (FR) codec.
Ericsson (Telefonaktiebolaget L. M. Ericsson) is a Swedish multinational networking and telecommunications company headquartered in Stockholm.
Extended Adaptive Multi-Rate – Wideband (AMR-WB+) is an audio codec that extends AMR-WB.
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.
FFmpeg is a free software project, the product of which is a vast software suite of libraries and programs for handling video, audio, and other multimedia files and streams.
A filename extension is an identifier specified as a suffix to the name of a computer file.
foobar2000 is a freeware audio player for Microsoft Windows, iOS and Android developed by Peter Pawłowski.
In telecommunication, information theory, and coding theory, forward error correction (FEC) or channel coding is a technique used for controlling errors in data transmission over unreliable or noisy communication channels.
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.
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.
G.711 is an ITU-T standard for audio companding.
G.729 is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length of 10 milliseconds.
GSM (Global System for Mobile communications) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation digital cellular networks used by mobile devices such as tablets, first deployed in Finland in December 1991.
Half Rate (HR or GSM-HR or GSM 06.20) is a speech coding system for GSM, developed in the early 1990s.
iOS (formerly iPhone OS) is a mobile operating system created and developed by Apple Inc. exclusively for its hardware.
iPhone is a line of smartphones designed and marketed by Apple Inc. The iPhone line of products use Apple's iOS mobile operating system software.
TIA/EIA standard IS-641 is a speech coding standard used in some computer and telecommunications networks in the U.S.A. Main usage was in the U.S. TDMA networks defined by IS-136.
The K-Lite Codec Pack is a collection of audio and video codecs for Microsoft Windows that enables an operating system and its software to play various audio and video formats generally not supported by the operating system itself.
Line spectral pairs (LSP) or line spectral frequencies (LSF) are used to represent linear prediction coefficients (LPC) for transmission over a channel.
Linear predictive coding (LPC) is a tool used mostly in audio signal processing and speech processing for representing the spectral envelope of a digital signal of speech in compressed form, using the information of a linear predictive model.
Link adaptation, or adaptive coding and modulation (ACM), is a term used in wireless communications to denote the matching of the modulation, coding and other signal and protocol parameters to the conditions on the radio link (e.g. the pathloss, the interference due to signals coming from other transmitters, the sensitivity of the receiver, the available transmitter power margin, etc.). For example, WiMAX uses a rate adaptation algorithm that adapts the modulation and coding scheme (MCS) according to the quality of the radio channel, and thus the bit rate and robustness of data transmission.
macOS (previously and later) is a series of graphical operating systems developed and marketed by Apple Inc. since 2001.
Mean opinion score (MOS) is a measure used in the domain of Quality of Experience and telecommunications engineering, representing overall quality of a stimulus or system.
MPlayer is a free and open media player software.
In radio, narrowband describes a channel in which the bandwidth of the message does not significantly exceed the channel's coherence bandwidth.
, commonly known as NTT, is a Japanese telecommunications company headquartered in Tokyo, Japan.
Nokia is a Finnish multinational telecommunications, information technology, and consumer electronics company, founded in 1865.
A patent is a set of exclusive rights granted by a sovereign state or intergovernmental organization to an inventor or assignee for a limited period of time in exchange for detailed public disclosure of an invention.
In patent law, a patent pool is a consortium of at least two companies agreeing to cross-license patents relating to a particular technology.
PDC Enhanced Full Rate is a speech coding standard that was developed by ARIB in Japan and used in PDC mobile networks in Japan.
PSQM (Perceptual Speech Quality Measure) is a computational and modeling algorithm defined in ITU Recommendation ITU-T P.861 that objectively evaluates and quantifies voice quality of voice-band (300 – 3400 Hz) speech codecs.
QuickTime is an extensible multimedia framework developed by Apple Inc., capable of handling various formats of digital video, picture, sound, panoramic images, and interactivity.
RealPlayer, formerly RealAudio Player, RealOne Player and RealPlayer G2, is a cross-platform media player app, developed by RealNetworks.
The RTP audio/video profile (RTP/AVP) is a profile for Real-time Transport Protocol (RTP) that specifies the technical parameters of audio and video streams.
In signal processing, sampling is the reduction of a continuous-time signal to a discrete-time signal.
SMPlayer is a cross-platform graphical front-end for MPlayer and forks of Mplayer using GUI widgets offered by Qt.
Speech coding is an application of data compression of digital audio signals containing speech.
The Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the GSM standard.
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.
Voice activity detection (VAD), also known as speech activity detection or speech detection, is a technique used in speech processing in which the presence or absence of human speech is detected.
3GP (3GPP file format) is a multimedia container format defined by the Third Generation Partnership Project (3GPP) for 3G UMTS multimedia services.
The 3rd Generation Partnership Project (3GPP) is a collaboration between groups of telecommunications standards associations, known as the Organizational Partners.