About encoding and decoding a digital data stream further List of codecs A codec is a device or computer ... desktopvideo.about.com od glossary g codec.htm title About.com Codec publisher About.com accessdate 2009 12 21 ref ref cite web url http www.afterdawn.com glossary terms codec.cfm title Glossary Codec ... C codecs.html title Ubuntu Documentation What is a codec? publisher Ubuntu Documentation Team accessdate 2009 12 21 ref The word codec is a portmanteau of co mpressor dec ompressor or, more commonly, co der dec oder . A codec the program should not be confused with a coding or compression format or standard a format is a document the standard , a way of storing data, while a codec is a program an implementation which can read or write such files. In practice, however, codec is sometimes used loosely to refer to formats. A codec encodes a data stream or signal for transmission, storage ... codec video compressor for digital transmission or storage. A receiving device then runs the signal ... codec is also used as a generic name for a video conferencing unit. Related concepts An endec encoder decoder is a similar yet different concept mainly used for hardware. In the mid 20th century, a codec ... sound back to audio . An audio codec converts analog audio signals into digital signals for transmission ... computers. A video codec accomplishes the same task for video signals. Compression quality Lossy ... from the original uncompressed sound or images, depending on the codec and the settings ... more than one codec or encoding scheme successively can also degrade quality significantly. The decreasing ..., or their use, to be encoded. For example, a digital video using a DV codec of a sports event ... loss rate. Other codecs may not make those same assumptions. When a user with a low bitrate codec talks to a user with another codec, additional distortion is introduced by each transcoding. Audio Video Interleave AVI is sometimes erroneously described as a codec, but AVI is actually a container ... more details
Wiktionary codecCodec may mean An audio codec converts between analog and digital representations or performs data compression. Codec , a hardware device or computer software used for coding and decoding transformations of data or signal media streams Codec, a fictional radio device used in the Metal Gear series Metal Gear games A video codec is a device or software that enables video compression and or decompression for digital video. disambig ... more details
Unreferenced date April 2010 The cook codec is a Lossy data compression lossy Audio data compression audio compression codec developed by RealNetworks . It is also known as Cooker, Gecko, RealAudio G2, and RealAudio 8 low bitrate RA8LBR . Introduced in 1998, the cook codec was the first audio codec developed by RealNetworks in house, and was named after its author, Ken Cooke. The design was largely based on G.722.1 . http lists.mplayerhq.hu pipermail ffmpeg cvslog 2007 April 007039.html It is a pure transform codec based on the modified discrete cosine transform with a single block size. In 2003, RealNetworks introduced a surround sound version of cook, called RealAudio Multichannel. This was initially designated by the four character code whrl , but is now identified as cook , as mono stereo files are. Although RealNetworks never published a technical description of the cook codec, others have Reverse engineering reverse engineered the format, and as of December 2005, FFmpeg libavcodec contains a decoder capable of playing cook encoded files. As of July 2009, Rockbox is capable of playing cook encoded files as well. See also RealAudio Category Audio codecs fr Cook Codec ja Cook Codec ... more details
notability date September 2011 one source date September 2011 The Animation codec is a fast Citation needed date November 2010 and lossless if encoded at 100 quality Quicktime video codec created by Apple Computer to enable playback of RGB video in Real time computing real time without expensive hardware. It supports color depths from 1 to 32 bits, and is one of the few video codecs that supports an alpha channel . The Animation codec uses run length encoding for compression, and as such works well for traditional 2 D animation where there are large areas of constant color, or have little change of pixels frame to frame like screencast . For complex 3D rendered scenes or digitized film of real world footage, it barely compresses at all and can also add visible noise at lower than 100 quality levels. It is also known by the acronym qtrle. It was also declared the winner of a recent screencast codec shootout ref http ayinat.blogspot.com 2007 08 screencast on linux with ffmpeg and.html ref . It is available in the FFMpeg codec suite. See also List of codecs Lossless compression List of lossless video codecs External links http wiki.multimedia.cx index.php?title Apple QuickTime RLE Technical Description of the Apple QuickTime RLE codec references DEFAULTSORT Animation Codec Category Video codecs multimedia software stub ... more details
Refimprove date December 2009 All codec s are devices or computer program s capable of Encoder coding or Decoding methods decoding a digital data stream or signal information theory signal . ref cite web url https www.microsoft.com windows windowsmedia player faq codec.mspx title Using codecs publisher Microsoft accessdate 2009 12 21 ref ref cite web url http desktopvideo.about.com od glossary g codec.htm title About.com Codec publisher About.com accessdate 2009 12 21 ref ref cite web url http www.afterdawn.com glossary terms codec.cfm title Glossary Codec publisher Afterdawn.com accessdate 2009 12 21 ref ref cite web url https help.ubuntu.com 8.04 musicvideophotos C codecs.html title Ubuntu Documentation What is a codec? publisher Ubuntu Documentation Team accessdate 2009 12 21 ref The term audio codec has two meanings depending on the context In software, an audio codec is a computer program implementing an algorithm that Audio compression data compresses and decompresses digital audio data according to a given audio file format or streaming media audio format. The object of the algorithm is to represent the high fidelity audio signal with minimum number of bits while retaining the quality. This can effectively reduce the storage space and the Bandwidth computing bandwidth required for transmission of the stored audio file . Most codec s are implemented as Library computing libraries which interface to one or more media player application software multimedia players . In hardware, audio codec refers to a single device that encodes analog audio as digital signals and decodes digital back into analog. In other words, it contains both an Analog to digital converter ADC and Digital ... codecs and containers Transcoding Video codec References Reflist Compression Methods state collapsed DEFAULTSORT Audio Codec Category Audio codecs Software type stub ca C dec d udio es C dec de audio fr Codage audiophonique it Codec audio pt Codec de udio ru tr Ses z c uk ... more details
Infobox file format name Opus logo caption mime audio opus ref cite web url http datatracker.ietf.org doc draft spittka payload rtp opus title RTP Payload Format and File Storage Format for Opus Speech and Audio Codec author Network Working Group date July 4, 2011 work Opus codec publisher IETF accessdate October 26, 2011 ref owner Jean Marc Valin, Koen Vos released Start date and age YYYY mm dd df yes no latest release version latest release date Start date and age YYYY mm dd df yes no genre Audio contained by Ogg , Matroska extended from SILK , CELT extended to standard No, http tools.ietf.org html draft ietf codec opus Internet Draft free Yes url url opus codec.org Opus originally Harmony ref cite mailing list url http www.ietf.org mail archive web codec current msg01852.html title Harmony became Opus date 2010 10 15 accessdate 2011 06 19 mailinglist http www.ietf.org mail archive web codec current maillist.html ietfcodec Discussion Archive last Vos first Koen ref is a low delay wideband Audio codec codec intended for applications such as Voice over IP VoIP that will eventually be Open format royalty free . ref cite web url http datatracker.ietf.org ipr 1602 title Skype Limited s Statement about IPR related to draft ietf codec opus 07 first Koen last Vos date July 23, 2011 publisher IETF accessdate October 26, 2011 ref Opus incorporates technology from the speech oriented SILK codec and the Latency engineering low latency CELT codec. Development for the codec is coordinated by the Internet Engineering Task Force IETF under the ietfcodec working group. Opus has been shown to have excellent quality, ref Raymond Chen et al. http www.ietf.org proceedings 80 slides codec 4.pdf Opus Testing . IETF 80 ref and at higher bit rate s, it turns out to be competitive with codecs with much higher delay, such as HE AAC and Vorbis . ref cite web url http people.xiph.org greg opus ha2011 title 64kbit sec stereo multiformat listening test unofficial results page first Greg last Ma ... more details
noreferences date April 2011 A video codec is a device or software that enables video compression or decompression ... of codecs, and this has led to the availability of codec packs a pre assembled set of commonly used codecs combined with an installer available as a software package for PCs, such as K Lite Codec Pack ... codec design Video codecs seek to represent a fundamentally analog data set in a digital format ... separately, a common first step in image compression in codec design is to represent and store ... s HDD5 4 2 2 . Apple Inc. Apple s new Prores HQ 422 codec also samples in 4 2 2 color space. More ... about this critical facet of video codec design, see B frames . Video codec designs are often standardized ... of the video produced by decoding the results of different encoders that use the same video codec ... Part 2 codec such as Xvid can be decoded played back using any other standard MPEG 4 Part 2 codec such as FFmpeg MPEG 4 or DivX Pro Codec, because they all use the same ... under to GNU GPL . Huffyuv Huffyuv or HuffYUV is a very fast, lossless Win32 video codec written ... as Lagarith. YULS x264 has a lossless mode. MPEG 4 Part 2 codecs DivX DivX Pro Codec A proprietary software proprietary MPEG 4 ASP codec made by DivX, Inc. Xvid free software Free open source software ... Included in the open source libavcodec codec library, which is used by default for decoding or encoding ... Pro Codec. 3ivx A commercial MPEG 4 codec created by 3ivx Technologies. H.264 MPEG 4 AVC codecs ... released by Apple Inc. Apple . DivX Pro Codec An H.264 decoder and encoder was added in version 7. Microsoft codecs WMV Windows Media Video Microsoft s family of proprietary video codec designs including .... MS MPEG 4v3 A proprietary and not MPEG 4 compliant video codec created by Microsoft. Released as a part of Windows Media Tools 4. A hacked version of Microsoft s MPEG 4v3 codec became known as DivX ... codec library . libtheora A Reference implementation computing reference implementation of the Theora ... more details
The Bluetooth Special Interest Group SIG has specified the low complexity, subband coding subband codec SBC in the Bluetooth profile Advanced Audio Distribution Profile A2DP Advanced Audio Distribution Profile A2DP . ref Bluetooth SIG, Specification of the Bluetooth System, Profiles, version 1.0 Advanced Audio Distribution Profile ref SBC is an audio encoder and decoder to connect Bluetooth high quality audio devices like headphones or loudspeakers. It can be also used on the Internet. ref C. Hoene, F. de Bont, RTP Payload Format for Bluetooth s SBC audio codec , IETF draft, work in progress, Dec. 2009, http tools.ietf.org html draft hoene avt rtp sbc 05 ref It uses 4 or 8 subbands, an adaptive bit allocation algorithm in combination with an adaptive block PCM quantizers. Frans de Bont has based the SBC audio codec on his earlier work, ref F. de Bont, M. Groenewegen and W. Oomen, A High Quality Audio Coding System at 128 kb s , 98th AES Convention, Febr. 25 28, 1995. ref and in parts on the MPEG 1 Audio Layer II standard. In addition, the SBC is based on the algorithms described in the EP 0400755B1. ref J.B. Rault, Y.F. Dehery, J.Y. Roudaut, A.A.M. Bruekers, R.N.J. Veldhuis, Digital transmission system using subband coding of a digital signal , Publication number EP0400755 B1 , Priority number s EP19900201369 19900530 EP19890201408 19890602 ref . The patent owners wrote that they allow the free usage of SBC in Bluetooth application, with the view to boost the use of this technology. All applications outside Bluetooth are however not free. The patent expired June 2, 2010. The A2DP test specification V1.0 contains a reference implementation of the encoder and decoder for the SBC codec. A Linux implementation is available at http www.bluez.org BlueZ The linux Bluetooth Stack. References reflist Category Audio codecs Category Bluetooth de Low Complexity Subband Codec fr Low Complexity Subband Codec ... more details
Sorenson codec may refer to either of three proprietary software proprietary video codec s Sorenson Video , Sorenson Video 3 or Sorenson Spark . Sorenson Video is also known as Sorenson Video Codec , Sorenson ... Flash formerly Macromedia Flash . History Sorenson Video The Sorenson Video codec first appeared with the release ... materials HyperGraph video codecs Sorenson.html Codec Central Sorenson Video , Retrieved on 2009 08 .... Sorenson Video 3 An improved Sorenson Video 3 codec debuted with the release of QuickTime 5.0.2 ... 08 09 ref The Sorenson Video 3 SV3 Pro Codec for QuickTime video is offered as a separate software product ... http www.sorensonmedia.com video3 SV3 Pro Codec , Retrieved on 2009 08 09 ref Sorenson Spark As Apple ... video codec to Macromedia as Sorenson Spark Sorenson H.263 , released with Macromedia Flash 6 MX ... Spark codec , Retrieved on 2009 08 09 ref Sorenson Spark is the required video compression format for Flash Player 6 and 7. Macromedia later tried to find a better video codec. Starting with Flash Player 8 released in September 2005 , the preferred video codec is VP6 . ref name cs4 ref name incomplete h263 Kaourantin.net 2005 08 13 http www.kaourantin.net 2005 08 quest for new video codec in flash 8.html The quest for a new video codec in Flash 8 , Retrieved on 2009 08 10 ref The Sorenson Spark ... Spark is an older codec but it is also a widely available and compatible one, when used in Flash ... 09 ref There is also Sorenson H.264 and Sorenson MPEG 4 codec, which are one of many existing implementations ... details The official specifications of the codec are not public. Sorenson Video For a long time ... on DrunkenBlog, July 28, 2004. ref of FFmpeg , reverse engineering of the SVQ3 codec Sorenson Video ... support for this codec to FFmpeg, making native playback possible on all platforms supported by FFmpeg ... www.digitalpreservation.gov formats fdd fdd000066.shtml Sorenson Video Codec, Version 3 format description ... fr Sorenson codec it Codec Sorenson pt Sorenson codec tr Sorenson z c s yo Sorenson Video ... more details
Avid DNxHD is First Codec Compliant with SMPTE VC 3 url http www.avid.com company releases 2008 080213 ... remained effectively a proprietary Avid format. The source code for the Avid DNxHD codec is freely ... that directly support the DNxHD codec. The Arri Alexa will support DNxHD in early 2012. Blackmagic ... products hyperdeckshuttle A standalone Quicktime codec for both Windows XP and Mac OS X is available ... 63 coefficients. DC coefficient is not quantized. The codec supports alpha channel information. VC 3 The DNxHD codec was submitted to the SMPTE organization as the framework for the VC 3 family of standards ... US industries workflow DNxHD Codec Avid DNxHD Codec Features http avid.custkb.com avid app selfservice search.jsp?DocId 372311 Avid Codec Downloads http www.ikegami.de press ibc2006 news.html Ikegami ... http www.nethra.us.com products am2045 overview.php Nethra VC 3 codec chip Compression Formats Compression Software Implementations DEFAULTSORT Dnxhd Codec Category Video codecs Category Film and video ... more details
Multiple issues notability October 2010 original research October 2010 unreferenced February 2010 A Plain old telephone service POTS codec is a type of audio codec that uses digital signal processing to transmit audio digitally over standard telephone lines Plain Old Telephone Service at a higher level of audio quality than the telephone line would normally provide in its analog mode. The POTS codec is one of a family of broadcast codecs differentiated by the type of telecommunications circuit used for transmission. The ISDN codec , which instead uses ISDN lines, and the IP codec which uses private or public IP networks are also common. Primarily used in broadcast engineering to link remote broadcast locations to the host studio, a computer hardware hardware codec , implemented with digital signal processing , is used to audio data compression compress the audio data enough to travel through a pair of a 33.6k modems. POTS codecs have the disadvantages of being restricted to relatively low bit rates and being susceptible to variable line quality. ISDN and IP codecs have the advantage of being natively digital , and operate at much higher bitrates, which results in fewer compression artifact s. Special lines must be run to a location, however, and must be ordered well in advance of the event so that there is ample time for installation of equipment. Since POTS lines are almost universally available, the POTS codec can be set up nearly anywhere with little or no notice. Uses The main use of a broadcast codec is for remote broadcast ing by Radio broadcasting radio stations . Functions Codecs usually come in two types of units rackmount for the studio and wikt portable portable for the remote. Audio can be sent in either direction, and most can also pass low speed non audio data, allowing the remote DJ to control broadcast automation or other studio equipment via RS 232 . Many have an automatic redial if the line should become disconnected. The remote unit usually has so ... more details
Asao also known as Nellymoser audio codec is a proprietary single channel mono codec and compression format optimized for low bitrate transmission of sound audio , developed by Nellymoser Nellymoser Inc. Sound data is grouped into frames of 256 samples. Each frame is converted into the frequency domain and the most significant highest amplitude frequencies are identified. A number of frequency bands are selected for encoding the rest are discarded. The bitstream for each frame then encodes which frequency bands are in use and what their amplitudes are. This codec does not take into consideration actual sample rate, and has fixed ratio between input samples amount and output packet size 2 bits ... on 2009 08 11 ref Macromedia is now Adobe Systems . The Nellymoser Asao codec is an integral part of the Flash plugin since Flash version 6, released in 2003. The codec is optimized for real time and low ... use the Nellymoser Asao codec. Flash Player 10 released in 2008 also supports the open source Speex codec. ref AskMeFlash.com 2009 05 10 http askmeflash.com article m.php?p article&id 2 Speex vs Nellymoser ... from Flash aka NellyMoser codec sucks Extracting from sound from Flash aka NellyMoser , Retrieved ... Voice Codec , Retrieved on 2009 08 12 ref Use in other technology At the time of the release of Flash ... created with FCS and nellymoser audio codec , Retrieved on 2009 08 13 ref ref FlashComGuru Forum 2006 ... bounty programm nellymoserasaocodec bounty.pdf Open Source Tender Implementation of an Audio Codec Compatible with Nellymoser Asao Codec PDF , Retrieved on 2009 08 12 ref ref http nellymoser.codec.googlepages.com Nellymoser Codec How many people have run into the same problem? , Retrieved on 2009 08 ... Nelly Moser codec. ref FlashComGuru Forum 2006 http www.flashcomguru.com forum forum posts.asp?TID 1842 ... support for the Nellymoser Asao codec. ref cite web title FFmpeg News url http ffmpeg.mplayerhq.hu ... Compression Formats Category Audio codecs yo Nellymoser Asao Codec ... more details
ratios achieved by the TTA codec vary, depending on music type, but range from 30 70 of the original ... and APEv2 . The TTA lossless audio codec allows for the storage of up to 20 audio Compact disc CDs ... links http en.true audio.com Official website http en.true audio.com TTA Lossless Audio Codec True Audio Compressor Algorithms Compression theory http en.true audio.com TTA Lossless Audio Codec Format Description TTA format description http en.true audio.com TTA Lossless Audio Codec Performance Comparison True Audio codec comparison http en.true audio.com TTA Lossless Audio Codec Hardware Support ... audio tl True Audio yo TTA codec zh TTA ... more details
IP Video Codecs IP video codecs are used widely in security and broadcast applications to send video between two locations. Video codecs use Data compression compression algorithms to send good video quality at substantially lower bit rates than uncompressed signals. Broadcast applications often use MPEG 2 and H.264 MPEG 4 AVC standards for video compression. The EBU is working on a minimum set of common standards for real time video over Internet Protocol IP transmissions. The recommended standards and protocols are designed ensure compatibility between different codecs and provide adequate high quality transmissions. IP Audio Codecs IP audio codec s are used to send broadcast quality audio over IP from remote broadcast locations to radio and television studios around the globe. IP codecs are ideal for use in remote broadcasts, as studio transmitter link s STLs or for studio to studio audio distribution. IP audio codecs use audio compression algorithms to send high fidelity audio over both wired broadband IP networks and wireless 3G, 3.5G and 4G broadband networks. References http tech.ebu.ch groups nvcip EBU N VCIP External links http www.tieline.com Transports Audio over IP Tieline Website Explaining Audio Over IP http www.ipaudioexpert.com IP Audio website with audio over IP broadcast information http www.audio via ip.com Official Audio via IP Experts Group website. http tech.ebu.ch docs tech tech3326.pdf EBU Tech 3326 for Audio Contribution over IP http tech.ebu.ch docs tech tech3329.pdf EBU Tech 3329 Tutorial on Audio Contribution over IP See also IP audio codec internet stub Category Telecommunications terms ... more details
Siren is a family of patented, transform based, wideband audio wideband audio codec s developed and licensed by PictureTel Corporation acquired by Polycom , Inc. in 2001 . ref name picturetel cite web author Business Wire publisher thefreelibrary.com url http www.thefreelibrary.com PictureTel Announces New Siren Wideband Audio Technology Licensing... a072261882 title PictureTel Announces New Siren Wideband Audio Technology Licensing Program date 2001 03 26 accessdate 2009 09 10 ref There are three Siren codecs Siren 7, Siren 14 and Siren 22. Siren 7 or Siren7 or only Siren provides 7 kHz audio, bit rate s 16, 24, 32 kbit s and sampling frequency 16 kHz. Siren is derived from PictureTel s PT716plus algorithm. ref name picturetel intel cite web author Business Wire publisher thefreelibrary.com url http www.thefreelibrary.com PictureTel Licenses Audio Technology Suite to Intel. a063558475 title PictureTel Licenses Audio Technology Suite to Intel date 2000 07 19 accessdate 2009 09 ... Acceleration of HD Voice Adoption by Offering Royalty Free Codec , Retrieved 2009 09 07 ref ref ... 2008, ITU T approved the new G.719 full band codec which is based on Polycom Siren 22 audio technology ... is by default performed using Microsoft s proprietary codec RTAudio . When a call is promoted into an audio conference any time 3 or more participants have joined , the codec is switched on the fly to Siren ... until the conference is terminated. In Windows XP and later versions of Windows, the Siren 7 codec is implemented ... the libsiren library, an open source implementation of the codec, written by aMSN developer Youness ... url http www.celt codec.org comparison title CELT Codec Feature Comparison year 2009 accessdate ... url http www.speex.org comparison title Speex Codec Quality Comparison year 2006 accessdate ... 7 hd voice codec.htm title Polycom CTO Discusses Siren 7 HD Voice Codec date 2008 08 06 accessdate 2009 ... technology siren22 index.html Polycom Siren 22 Compression formats Category Audio codecs yo Siren Codec ... more details
notability date September 2011 primarysources date July 2008 The Apple Intermediate Codec abbreviated AIC by users, Apple Engineers don t use the abbreviation is a video codec designed by Apple Inc. to be an intermediate ... to the standard definition DV codec the Apple Intermediate Codec does not use temporal compression ... kb HT2704 ref As a result of this, the Apple Intermediate Codec takes three to four times more space than HDV . The Apple Intermediate Codec is available only on the Mac OS X platform and cannot ... which makes use of the QuickTime codec libraries primarily Final Cut Studio , Final Cut Express , and iMovie , but also freeware such as MPEG Streamclip can use the Apple Intermediate codec. The Apple Intermediate Codec was used because it was less processor intensive as the compression scheme ... instead of the Apple Intermediate Codec, though some versions of Final Cut Pro HD 4.5 through 5 ... Codec The Apple Intermediate Codec is an extremely precise high quality codec that was developed by apple ... and then transcoed to the Apple Intermediate Codec to optimize video for playback in real time. Working with the Apple Intermediate Codec is less processor intensive than working with native HDV. Unlike MPEG 2 HDV, the Apple Intermediate Codec does not use temporal compression, so every frame can be decoded and displayed immediately without first decoding other frames. The drawback of this codec ... 2 HDV. Color Recording Method Both MPEG 2 HDV and Apple Intermediate Codec HDV record a 4 2 0 component ... Intermediate Codec if you plan to edit in Final Cut Pro. Format Details class wikitable MPEG ... hr. Apple Intermediate Codec HDV 720p30 approximately 7 MB sec. equivalent to approximately 25 GB hr. Apple Intermediate Codec HDV 1080i50 approximately 12 MB sec. equivalent to approximately 42 GB hr. Apple Intermediate Codec HDV 1080i60 approximately 14 MB sec. equivalent to approximately 49 GB ... and the Apple Intermediate Codec http documentation.apple.com en finalcutpro professionalformatsandworkflows ... more details
Enhanced Audio Codec is an audio codec developed and owned by Beijing E World, that uses a unique perceptual model, spectral band replication , to compress the audio signal by utilizing the redundancy as well as the relevancy. The EAC codec supports Monophonic sound mono , stereo and Surround sound 5.1 Channel Surround .283 2 Stereo.29 .28digital discrete Dolby Digital.2C DTS.2C SDDS.29 5.1 surround sound modes for encoding and decoding. EAC is part of the EVD system specification. External references http en.shinco.com web news.php?action viewnews&news id 12 http www.codingtechnologies.com news assets 20031118 beijing eng.pdf http www.davworld.com eindex.htm Category Audio codecs de Enhanced Audio Codec ... more details
Infobox software name MSU Lossless Video Codec screenshot File MSU Lossless Video Codec settings panel.png 300px developer nowrap Dmitry Vatolin , nowrap Dmitry Popov , nowrap Sergey Putilin discontinued In favour of YULS latest preview version 0.6.0 latest preview date Start date and age 2005 9 19 df no programming language C operating system Microsoft Windows platform IA 32 size nowrap 157 Kilobyte KB language English status Unmaintained genre lossless video codec license Proprietary software Proprietary , free for nowrap non commercial use website URL http www.compression.ru video ls codec index en.html The MSU Lossless Video Codec is a video codec developed by the Graphics & Media Lab Video Group of Moscow State University . It was designed to provide space effective lossless data compression lossless video compression . MSU currently has the second best compression ratio when compared to many other lossless video codecs, ref citation title Lossless Video Codecs Comparison 2007 url http compression.ru video codec comparison lossless codecs 2007 en.html work MSU Graphics & Media Lab Video Group year 2007 accessdate 2011 12 07 ref with the better result shown by YULS codec. Description MSU Lossless Video Codec is available as a Video for Windows codec. It can be used from such applications as VirtualDub or Adobe Premiere . Possible input formats are RGB24 , RGB32 , YUY2 , YUYV and YV12 . The codec is available freeware free of charge for non commercial use. asof 2011 11 23 the commercial software commercial license is unavailable. The source code of codec is unavailable. Regardless of its name the codec has several lossy compression lossy modes. Release history class wikitable Version Date Changes 0.6.0 dts 2005 9 19 new compression algorithm implementation user interface ... release References reflist Compression Software Implementations DEFAULTSORT Msu Lossless Video Codec ... Codec ... more details
Infobox software name Combined Community Codec Pack logo File CCCP logo.png 64px screenshot caption collapsible author developer released discontinued latest release version 2011 11 11 latest release date Release date 2011 11 11 ref cite web url http www.cccp project.net forums index.php?topic 6094.0 title New CCCP Win7 Vista XP Release 2011 11 11 accessdate 2011 11 12 ref latest preview version 2011 07 20 beta latest preview date Release date 2011 07 20 ref cite web url http www.cccp project.net beta title List of CCCP beta release files accessdate 2011 07 20 ref frequently updated programming language operating system Microsoft Windows platform size language status genre Video codec Audio codec license Freeware website http www.cccp project.net www.cccp project.net The Combined Community Codec Pack , more commonly referred to as the CCCP , is a collected archive of codec s video compression filters packed for Microsoft Windows , designed originally for the playback of anime fansub s. ref name review cite web url http www.freewaregenius.com 2007 02 09 cccp codec pack title Review at freewaregenius.com ... codec packs Provide a video media playback standard for the anime community Be capable of playing back ... solution. To view a CCCP approved video, one must simply theoretically uninstall all other codec packs ... as the only trustworthy Codec pack available today. ref name c t cite journal url http www.heise.de ... , Matroska MKV , MP4 , FLV , 3GP and MPEG transport stream TS Video codec s MPEG 2 , DivX , XviD ... lavc , etc. Audio codec s MP1, MPEG 1 Audio Layer II MP2 , MP3 , Dolby AC 3 AC3 , Digital Theater System DTS , Advanced Audio Coding AAC , Vorbis , LPCM , FLAC , TTA codec TTA and WavPack Notable ... Real Alternative Media Player Classic K Lite Codec Pack Perian A similar bundle for Mac OS X References ... only freeware fr Combined Community Codec Pack ja Combined Community Codec Pack ru Combined Community Codec Pack ... more details
Infobox file format name internet Speech Audio Codec iSAC icon logo caption extension mime audio isac ref name rfc draft cite web url http tools.ietf.org html draft legrand rtp isac 02 title RTP Payload Format for the iSAC Codec Internet Draft draft legrand rtp isac 02.txt date 2009 accessdate 2011 06 23 ref type code uniform type magic owner Global IP Solutions , now Google Inc released Start date YYYY mm dd df yes latest release version latest release date Start date and age YYYY mm dd df yes no genre Audio compression format containerfor containedby extendedfrom extendedto standard url Infobox software name iSAC Codec logo screenshot caption collapsible author developer Global IP Solutions , now Google Inc released latest release version latest release date latest preview version latest preview date frequently updated programming language C programming language C operating system Cross platform operating system desc size language status genre Audio codec , reference implementation computing reference implementation license formerly proprietary, now BSD licenses 3 clause BSD website http www.webrtc.org lowercase internet Speech Audio Codec iSAC is a wideband Speech communication speech codec , developed by Global IP Solutions GIPS acquired by Google Inc in 2011 ref cite web url http www.zdnet.com blog open source why google bought global ip solutions 6501 title Why Google bought Global IP Solutions author Dana Blankenhorn date 2010 05 18 accessdate 2011 06 23 ref ref cite web url http www.webrtc.org ilbc freeware title iLBC Freeware accessdate 2011 06 23 ref . It is suitable for VoIP applications and streaming audio . The encoded blocks have to be encapsulated in a suitable ... proprietary codec licensed by Global IP Solutions. As of June 2011, it is part of open source ... audio codec ref , which includes a royalty free license for iSAC when using the WebRTC codebase ref ... Audio Codec it Internet Speech Audio Codec yo Internet Speech Audio Codec ... more details
Enhanced Variable Rate CODEC EVRC is a speech codec used in CDMA networks. It was developed in 1995 to replace the QCELP vocoder which used more bandwidth on the carrier s network, thus EVRC s primary goal was to offer the mobile carriers more capacity on their networks while not increasing the amount of bandwidth or wireless spectrum needed. ref http telephonyonline.com wireless mag wireless evrc best worlds EVRC Best of Both Worlds Bot generated title ref EVRC uses RCELP technology, which Qualcomm claims improves speech quality with lower bit rates. Citation needed date May 2008 EVRC compresses each 20 milliseconds of 8000 Hz, 16 bit sampled speech input into output frames of one of three different sizes full rate 171 bits 8.55 kbit s , half rate 80 bits 4.0 kbit s , eighth rate 16 bits 0.8 kbit s . A quarter rate was not included in the original EVRC specification and eventually became part of EVRC B . A zero length frame is included in the specification for null and erasure frames. The eighth 1 8 rate is not intended for speech signals, but instead for background noise. Due to the source controlled nature of the codec the average bit rate varies based on network conditions, but is usually around 6 kbit s. Citation needed date February 2007 EVRC was replaced by SMV which retained the speech quality Citation needed date October 2007 and at the same time improved network capacity. Recently, however, SMV itself has been replaced by the new CDMA2000 4GV codecs. 4GV is the next generation 3GPP2 standards based EVRC B codec. 4GV is designed to allow service providers to dynamically prioritize voice capacity on their network as required. EVRC can be also used in 3GPP2 container file format 3GP 3G2 . External links http www.3gpp2.org public html specs C.S0014 A v1.0 040426.pdf 3GPP2 specification http www.arcx.com sites EVRC.htm EVRC The Savior of CDMA? RFC 4788 Enhancements ... fr EVRC ja EVRC yo Enhanced Variable Rate Codec ... more details
Infobox software name libdce title libdce logo File screenshot File caption collapsible author developer released Start date YYYY MM DD df yes no discontinued latest release version latest release date Start date and age YYYY MM DD df yes no latest preview version latest preview date Start date and age YYYY MM DD df yes no frequently updated DO NOT include this parameter unless you know what it does programming language C programming language C operating system Unix like platform size language status genre Library computing Library license website URL http github.com robclark libdce Distributed Codec Engine DCE is an open source software Library computing library libdce and Application programming interface API specification by Texas Instruments . It enables and provides remote access to hardware acceleration for audio and video decoding on the IVA HD in OMAP OMAP4 ARM system on chip s based platforms via a syslink rcm shim layer accessing the OMAP s Codec Engine API codec interface on the co processor Ducati M3 from the host under Linux without needing OpenMAX . ref http www.phoronix.com scan.php?page news item&px MTAzNjY libdce The Distributed Codec Engine ref ref http bloggingthemonkey.blogspot.com 2010 11 announcing libdce and gst ducati.html Announcing libdce and gst ducati ref ref http pandaboard.org content libdce libdce ref Software supporting DCE gst ducati, a GStreamer plugin for OMAP4 using libdce ref https github.com robclark gst ducati ref ref http bloggingthemonkey.blogspot.com 2010 11 announcing libdce and gst ducati.html Announcing libdce and gst ducati ref omapfbplay, an video player for OMAP using DirectFB frame buffer ref http git.mansr.com ?p omapfbplay Video player for OMAP framebuffer ref See also OMAP SoC hardware by Texas Instruments that supports libdce Video Acceleration API Video Acceleration API VA API an alternative video acceleration API for Linux UNIX operating system. VDPAU VDPAU Video Decode and Presentation API for Unix X Video Bits ... more details
A codec listening test is a scientific Experiment study designed to compare two or more lossy compression lossy sound reproduction audio codec s, usually with respect to perceived fidelity or compression efficiency. Most tests take the form of a double blind comparison. Commonly used methods are known as ABX test ABX or ABC HR or MUSHRA . There are various software packages available for individuals to perform this type of testing themselves with minimal assistance. Testing methods ABX test main ABX test In an ABX test, the listener has to identify an unknown sample X as being A or B, with A usually the original and B usually the encoded version available for reference. The outcome of a test must be statistically significant. This setup ensures that the listener is not biased by his her expectations, and that the outcome is not likely to be the result of chance. If sample X cannot be determined reliably with a low p value in a predetermined number of trials, then the null hypothesis cannot be rejected and it cannot be proved that there is a perceptible difference between samples A and B. This usually indicates that the encoded version will actually be Transparency data compression transparent to the listener. ABC HR test In an ABC HR test, C is the original which is always available ... that the codec has achieved transparency data compression transparency . Popular formats compared ... extensions , Vorbis , Musepack , and Windows Media Audio WMA . The Cook Codec RealAudio Gecko ..., Current Codec, allow M S and IS, allow narrowing, no CRC Real Audio Gecko from Real Producer 9.0.1 ... encoded by LAME to all the tested codecs at 64 kbit s, with greater than 99 confidence No codec ... 1.0 VBR quality 40, Current Best codec. Apple iTunes 4.2 MP3 112 kbit s VBR, Highest quality, joint ... 19 29 iTunes Open source FAAC codec improved greatly since previous test valign top http listening tests.freetzi.com ... s stereo music codec in Helix Producer 10 QDesign Music Codec 2 Pro 32 kbit s at 32 kHz, Quality mode ... more details
Enhanced Variable Rate Codec B EVRC B is a speech codec used by CDMA networks. EVRC B is an enhancement to EVRC and compresses each 20 milliseconds of 8000 Hz, 16 bit sampled speech input into output frames of one of the four different sizes Rate 1 171 bits, Rate 1 2 80 bits, Rate 1 4 40 bits, Rate 1 8 16 bits. In addition, there are two zero bit codec frame types null frames and erasure frames, similar to EVRC. One significant enhancement in EVRC B is the use of 1 4 rate frames that were not used in EVRC. This provides lower average data rates ADRs compared to EVRC, for a given voice quality. The new 4GV Codecs used in CDMA2000 are based on EVRC B. 4GV is designed to allow service providers to dynamically prioritize voice capacity on their network as required. The Enhanced Variable Rate Coder EVRC is a speech codec used for cellular telephony in cdma2000 systems. EVRC provides excellent speech quality using variable rate coding with 3 possible rates, 8.55, 4.0 and 0.8 kbit s. However, the Quality of Service QoS in cdma2000 systems can significantly benefit from a codec which allows tradeoffs between voice quality and network capacity, which cannot be achieved efficiently with the EVRC. An upgrade of the EVRC vocoder, known as EVRC B, was recently introduced by 3GPP2 . The EVRC B speech codec is based on the 4GV concept and is the newest and most advanced speech codec for cellular applications. In addition to the Relaxed Code Excitation Linear Prediction RCELP used by EVRC, EVRC B uses Prototype Pitch Period PPP approach for coding of stationary voice frames and Noise Excitation ... capacity. EVRC B will replace EVRC as the main speech codec for cdma2000 and its first network commercial ... for the Enhanced Variable Rate Wideband Codec EVRC WB and the Media Subtype Updates for EVRC B Codec Compression Formats Category Speech codecs telecomm stub compu stub yo Enhanced Variable Rate Codec B ... more details
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