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Optical disc

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In computing and optical disc recording technologies, an optical disc (OD) is a flat, usually circular disc which encodes binary data (bits) in the form of pits (binary value of 0 or off, due to lack of reflection when read) and lands (binary value of 1 or on, due to a reflection when read) on a special material (often aluminium) on one of its flat surfaces. [1]

110 relations: AgInSbTe, Alexander Graham Bell, Alloy, Aluminium, Antimony, Archival Disc, Atlanta, Bit, Blu-ray, CD player, CD-R, CD-ROM, CD-RW, Charles Sumner Tainter, Chichester Bell, China Blue High-definition Disc, Codec, Compact disc, Compact Disc Digital Audio, Computer Chronicles, Computing, Constant angular velocity, Constant linear velocity, Data compression, DataPlay, David Paul Gregg, Denon, Diffraction grating, Digital Multilayer Disk, Digital recording, Digital video, DIVX, Double-density compact disc, DualDisc, DVD, DVD recordable, DVD-Audio, DVD-RAM, Enhanced Versatile Disc, Floppy disk, Fluorescent Multilayer Disc, Forward Versatile Disc, GD-ROM, Gigabyte, H.264/MPEG-4 AVC, Hard disk drive, Hard disk recorder, HD DVD, High-definition optical disc format war, High-definition television, ..., Holographic Versatile Disc, Home video, Hyper CD-ROM, Indium, Iridescence, James Russell (inventor), Lacquer, Laser, Laser diode, LaserDisc, LS-R, M-DISC, Magnetic storage, Magneto-optical drive, Massachusetts Institute of Technology, Micrometre, MiniDisc, Multiplexed Optical Data Storage, Nanometre, National Institute of Standards and Technology, Netherlands, Nintendo optical discs, Numerical aperture, Nyquist rate, Optical disc drive, Optical disc recording technologies, Optical media preservation, Optical Storage Technology Association, Panasonic, Personal computer, Phase-change Dual, Phase-change material, Philips, Physicist, Pioneer Corporation, Polycarbonate, Professional Disc, Reflectance, Revolutions per minute, Royalty payment, Silver, Sony, Stacked Volumetric Optical Disc, Super Audio CD, Super Video CD, Tellurium, Terabyte, Toshiba, Ultra Density Optical, Ultra HD Blu-ray, Universal Media Disc, USB flash drive, VC-1, Versatile Multilayer Disc, VHS, Video, Video CD, Wavelength, Write once read many, 44,100 Hz. Expand index (60 more) »


AgInSbTe, or Silver-Indium-Antimony-Tellurium, is a phase change material from the group of chalcogenide glasses, used in rewritable optical discs (such as rewritable CDs) and phase-change memory applications.

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Alexander Graham Bell

Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with inventing and patenting the first practical telephone.

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An alloy is a combination of metals or of a metal and another element.

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Aluminium or aluminum is a chemical element with symbol Al and atomic number 13.

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Antimony is a chemical element with symbol Sb (from stibium) and atomic number 51.

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Archival Disc

Archival Disc (AD) is the name of a trademark owned by Sony Corporation and Panasonic Corporation describing an optical disc storage medium designed for long-term digital storage.

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Atlanta is the capital city and most populous municipality of the state of Georgia in the United States.

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The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.

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Blu-ray or Blu-ray Disc (BD) is a digital optical disc data storage format.

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CD player

A CD player is an electronic device that plays audio compact discs, which are a digital optical disc data storage format.

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CD-R (Compact Disc-Recordable) is a digital optical disc storage format.

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A CD-ROM is a pre-pressed optical compact disc which contains data.

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CD-RW (Compact Disc-ReWritable) is a digital optical disc storage format.

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Charles Sumner Tainter

Charles Sumner Tainter (April 25, 1854 – April 20, 1940) was an American scientific instrument maker, engineer and inventor, best known for his collaborations with Alexander Graham Bell, Chichester Bell, Alexander's father-in-law Gardiner Hubbard, and for his significant improvements to Thomas Edison's phonograph, resulting in the Graphophone, one version of which was the first Dictaphone.

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Chichester Bell

Chichester Alexander Bell (1848–1924) was a chemist, first cousin of Alexander Graham Bell, and instrumental in developing improved versions of the phonograph.

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China Blue High-definition Disc

China Blue High-Definition (CBHD;; alternatively "China High Definition DVD") is a high definition optical disc format announced in September 2007 by the Optical Memory National Engineering Research Center (OMNERC) of Tsinghua University in China.

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

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Compact disc

Compact disc (CD) is a digital optical disc data storage format that was co-developed by Philips and Sony and released in 1982.

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Compact Disc Digital Audio

Compact Disc Digital Audio (CDDA or CD-DA) is the standard format for audio compact discs.

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Computer Chronicles

Computer Chronicles was an American half-hour television series, broadcast from 1983 to 2002 on Public Broadcasting Service (PBS) public television, which documented the rise of the personal computer from its infancy to the immense market at the turn of the 21st century.

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Computing is any goal-oriented activity requiring, benefiting from, or creating computers.

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Constant angular velocity

In optical storage, constant angular velocity (CAV) is a qualifier for the rated speed of any disc containing information, and may also be applied to the writing speed of recordable discs.

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Constant linear velocity

In optical storage, constant linear velocity (CLV) is a qualifier for the rated speed of an optical disc drive, and may also be applied to the writing speed of recordable discs.

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Data compression

In signal processing, data compression, source coding, or bit-rate reduction involves encoding information using fewer bits than the original representation.

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DataPlay was an optical disc system developed by DataPlay Inc. and released to the consumer market in 2002.

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David Paul Gregg


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is a Japanese electronics company that was involved in the early stages of development of digital audio technology, while specializing in the manufacture of high-fidelity professional and consumer audio equipment.

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Diffraction grating

In optics, a diffraction grating is an optical component with a periodic structure that splits and diffracts light into several beams travelling in different directions.

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Digital Multilayer Disk

Digital Multilayer Disk (DMD) is an optical disc format developed by D Data Inc.

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Digital recording

In digital recording, audio signals picked up by a microphone or other transducer or video signals picked up by a camera or similar device are converted into a stream of discrete numbers, representing the changes over time in air pressure for audio, and chroma and luminance values for video, then recorded to a storage device.

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Digital video

Digital video is an electronic representation of moving visual images (video) in the form of encoded digital data.

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DIVX (Digital Video Express) was an unsuccessful attempt by Circuit City and the entertainment law firm Ziffren, Brittenham, Branca and Fischer to create an alternative to video rental in the United States.

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Double-density compact disc

Double-density compact disc (DDCD) is an optical disc technology developed by Sony using the same laser wavelength as compact disc, namely 780 nm.

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DualDisc was a type of double-sided optical disc product developed by a group of record companies including MJJ Productions Inc, EMI Music, Universal Music Group, Sony/BMG Music Entertainment, Warner Music Group, and 5.1 Entertainment Group and later under the aegis of the Recording Industry Association of America (RIAA).

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DVD (an abbreviation of "digital video disc" or "digital versatile disc") is a digital optical disc storage format invented and developed by Philips and Sony in 1995.

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DVD recordable

DVD recordable and DVD rewritable refer to part of optical disc recording technologies.

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DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD.

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DVD-RAM (DVD Random Access Memory) is a disc specification presented in 1996 by the DVD Forum, which specifies rewritable DVD-RAM media and the appropriate DVD writers.

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Enhanced Versatile Disc

The enhanced versatile disc (EVD) is an optical-medium-based digital audio/video format, developed by Beijing E-World (a multi-company partnership including SVA, Shinco, Xiaxin, Yuxing, Skyworth, Nintaus, Malata, Changhong, and BBK), as a rival to the DVD to avoid the high royalty costs associated with the DVD format.

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Floppy disk

A floppy disk, also called a floppy, diskette, or just disk, is a type of disk storage composed of a disk of thin and flexible magnetic storage medium, sealed in a rectangular plastic enclosure lined with fabric that removes dust particles.

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Fluorescent Multilayer Disc

Fluorescent Multilayer Disc (FMD) is an optical disc format developed by Constellation 3D that uses fluorescent, rather than reflective materials to store data.

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Forward Versatile Disc

Forward Versatile Disc (FVD) is an offshoot of DVD developed in Taiwan jointly by the Advanced Optical Storage Research Alliance (AOSRA) and the Industrial Technology Research Institute (ITRI) as a less expensive alternative for high-definition content.

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GD-ROM (an abbreviation of "Gigabyte Disc Read-Only Memory") is a proprietary optical disc format originally used for the Dreamcast video game console, as well as its arcade counterpart, the Sega NAOMI and select Triforce arcade board titles.

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The gigabyte is a multiple of the unit byte for digital information.

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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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Hard disk drive

A hard disk drive (HDD), hard disk, hard drive or fixed disk is an electromechanical data storage device that uses magnetic storage to store and retrieve digital information using one or more rigid rapidly rotating disks (platters) coated with magnetic material.

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Hard disk recorder

A hard disk recorder (HDR) is a system that uses a high-capacity hard disk to record digital audio or digital video.

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HD DVD (short for High Definition Digital Versatile Disc) is a discontinued high-density optical disc format for storing data and playback of high-definition video.

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High-definition optical disc format war

The high-definition optical disc format war was between the Blu-ray and HD DVD optical disc standards for storing high-definition video and audio; it took place between 2006 and 2008 and was won by Blu-ray Disc.

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High-definition television

High-definition television (HDTV) is a television system providing an image resolution that is of substantially higher resolution than that of standard-definition television, either analog or digital.

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Holographic Versatile Disc

The Holographic Versatile Disc (HVD) is an optical disc technology developed between April 2004 and mid-2008 that can store up to several terabytes of data on an optical disc 10 cm or 12 cm in diameter.

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Home video

Home video is pre-recorded video media that is either sold, rented or streamed for home entertainment.

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Hyper CD-ROM

The Hyper CD-ROM is an optical data storage device similar to the CD-ROM with a multilayer 3D structure, invented by Romanian scientist Dr.

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Indium is a chemical element with symbol In and atomic number 49.

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Iridescence (also known as goniochromism) is the phenomenon of certain surfaces that appear to gradually change colour as the angle of view or the angle of illumination changes.

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James Russell (inventor)

James T. Russell (born 1931 in Bremerton, Washington) is an American inventor.

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The term lacquer is used for a number of hard and potentially shiny finishes applied to materials such as wood.

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A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation.

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Laser diode

A laser diode, (LD), injection laser diode (ILD), or diode laser is a semiconductor device similar to a light-emitting diode in which the laser beam is created at the diode's junction.

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LaserDisc (abbreviated as LD) is a home video format and the first commercial optical disc storage medium, initially licensed, sold and marketed as MCA DiscoVision in the United States in 1978.

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LS-R, or the Layer-Selection-Type Recordable Optical Disk, is the term coined by Hitachi in 2003 for a next-generation optical disc technology which allows much larger data storage densities than DVD, HD DVD or Blu-ray Disc, by allowing the use of a large number of data layers in a single disc.

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M-DISC (Millennial Disc) is a write-once optical disc technology introduced in 2009 by Millenniata, Inc.

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Magnetic storage

Magnetic storage or magnetic recording is the storage of data on a magnetized medium.

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Magneto-optical drive

A magneto-optical drive is a kind of optical disc drive capable of writing and rewriting data upon a magneto-optical disc.

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Massachusetts Institute of Technology

The Massachusetts Institute of Technology (MIT) is a private research university located in Cambridge, Massachusetts, United States.

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The micrometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: μm) or micrometer (American spelling), also commonly known as a micron, is an SI derived unit of length equaling (SI standard prefix "micro-".

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MiniDisc (MD) is a magneto-optical disc-based data storage format offering a capacity of 74 minutes and, later, 80 minutes, of digitized audio or 1 gigabyte of Hi-MD data.

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Multiplexed Optical Data Storage

Multiplexed Optical Data Storage is a system which involves using polarized light to increase the storage capacities of optical storage mediums.

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The nanometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: nm) or nanometer (American spelling) is a unit of length in the metric system, equal to one billionth (short scale) of a metre (m).

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National Institute of Standards and Technology

The National Institute of Standards and Technology (NIST) is one of the oldest physical science laboratories in the United States.

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The Netherlands (Nederland), often referred to as Holland, is a country located mostly in Western Europe with a population of seventeen million.

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Nintendo optical discs

Nintendo optical discs are the optical disc format used to distribute video games released by Nintendo.

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Numerical aperture

In optics, the numerical aperture (NA) of an optical system is a dimensionless number that characterizes the range of angles over which the system can accept or emit light.

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Nyquist rate

In signal processing, the Nyquist rate, named after Harry Nyquist, is twice the bandwidth of a bandlimited function or a bandlimited channel.

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Optical disc drive

In computing, an optical disc drive (ODD) is a disc drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs.

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Optical disc recording technologies

Optical disc authoring requires a number of different optical disc recorder technologies working in tandem, from the optical disc media to the firmware to the control electronics of the optical disc drive.

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Optical media preservation

The preservation of optical media is essential because it is a resource in libraries, and stores audio, video, and computer data to be accessed by patrons.

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Optical Storage Technology Association

The Optical Storage Technology Association (OSTA) is an international trade association which promotes the use of recordable optical technologies and products, and most notably it is responsible for the creation and maintenance of the UDF specification.

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, formerly known as, is a Japanese multinational electronics corporation headquartered in Kadoma, Osaka, Japan.

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Personal computer

A personal computer (PC) is a multi-purpose computer whose size, capabilities, and price make it feasible for individual use.

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Phase-change Dual

Phase-Change Dual (PD) is a rewritable optical disc format introduced by Panasonic in 1995.

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Phase-change material

A phase change material (PCM) is a substance with a high heat of fusion which, melting and solidifying at a certain temperature, is capable of storing and releasing large amounts of energy.

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Koninklijke Philips N.V. (Philips, stylized as PHILIPS) is a Dutch multinational technology company headquartered in Amsterdam currently focused in the area of healthcare.

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A physicist is a scientist who has specialized knowledge in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe.

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Pioneer Corporation

commonly referred to as Pioneer, is a Japanese multinational corporation based in Tokyo, Japan that specializes in digital entertainment products.

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Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures.

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Professional Disc

Professional Disc (PFD) is a digital recording optical disc format introduced by Sony in 2003 primarily for XDCAM, its new tapeless camcorder system.

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Reflectance of the surface of a material is its effectiveness in reflecting radiant energy.

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Revolutions per minute

Revolutions per minute (abbreviated rpm, RPM, rev/min, r/min) is the number of turns in one minute.

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Royalty payment

A royalty is a payment made by one party, the licensee or franchisee to another that owns a particular asset, the licensor or franchisor for the right to ongoing use of that asset.

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Silver is a chemical element with symbol Ag (from the Latin argentum, derived from the Proto-Indo-European ''h₂erǵ'': "shiny" or "white") and atomic number 47.

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

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Stacked Volumetric Optical Disc

The Stacked Volumetric Optical Disc (or SVOD) is an optical disc format developed by Hitachi/Maxell, which uses an array of wafer-thin optical discs to allow data storage.

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Super Audio CD

Super Audio CD (SACD) is a read-only optical disc for audio storage, introduced in 1999.

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Super Video CD

Super Video CD (Super Video Compact Disc or SVCD) is a digital format for storing video on standard compact discs.

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Tellurium is a chemical element with symbol Te and atomic number 52.

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The terabyte is a multiple of the unit byte for digital information.

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, commonly known as Toshiba, is a Japanese multinational conglomerate headquartered in Tokyo, Japan.

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Ultra Density Optical

Ultra Density Optical (UDO) is an optical disc format designed for high-density storage of high-definition video and data.

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Ultra HD Blu-ray

Ultra HD Blu-ray is a digital optical disc data storage format that supersedes Blu-ray.

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Universal Media Disc

The Universal Media Disc (UMD) is a discontinued optical disc medium developed by Sony for use on their PlayStation Portable handheld gaming and multimedia platform.

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USB flash drive

A USB flash drive, also variously known as a thumb drive, pen drive, gig stick, flash stick, jump drive, disk key, disk on key (after the original M-Systems DiskOnKey drive from 2000), flash-drive, memory stick (not to be confused with the Sony Memory Stick), USB stick or USB memory, is a data storage device that includes flash memory with an integrated USB interface.

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

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Versatile Multilayer Disc

Versatile Multilayer Disc (VMD or HD VMD) is a high-capacity red laser optical disc technology designed by New Medium Enterprises, Inc..

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The Video Home System (VHS) is a standard for consumer-level analog video recording on tape cassettes.

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Video is an electronic medium for the recording, copying, playback, broadcasting, and display of moving visual media.

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Video CD

Video CD (abbreviated as VCD, and also known as Compact Disc digital video) is a home video format and the first format for distributing films on standard optical discs.

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In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats.

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Write once read many

Write once read many (WORM) describes a data storage device in which information, once written, cannot be modified.

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44,100 Hz

In digital audio, 44,100 Hz (alternately represented as 44.1 kHz) is a common sampling frequency.

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

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