codec examples

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codec examples

Following is a list of popular speech, audio and video codecs. A codec is a hardware circuit that performs the conversion from analog signals to digital data, and it is also software and/or hardware that further compresses the digital data into less space (for more details, see codec). See lossy compression, data compression formats, video format, SD formats and HD formats.

Speech Codecs Are Specialized
Speech codecs are audio codecs that look for sound and language patterns. In addition, since the human voice falls into a much more limited audio range than music, a speech codec is able to achieve the highest voice compression.

SPEECH CODECSName         Purpose

 A-Law        PCM telephony in Europe
 µ-Law        PCM telephony in U.S.

 DV Audio     MiniDV audio

 GSM 6.10     GSM cellphone

 G.711        A/V conferencing (ITU)
 G.722        A/V conferencing (ITU)
 G.723.1      VoIP, A/V conferencing (ITU)
 G.728        A/V conferencing (ITU)
 G.729        A/V conferencing (ITU)

 AMR-NB       GSM, 3GPP (ETSI narrowband)
 AMR-WB       GSM, 3GPP (ETSI wideband)
 ACELP.net    General speech (VoiceAge)
 ACELP.wide   High quality (VoiceAge)

 Ogg Speex    Low bitrate


 MUSIC CODECSName            Origin

 MP3             MPEG

 AAC             MPEG
 AAC Protected   MPEG with DRM

 WMA             Windows
 WMA Protected   Windows with DRM
 WMA Lossless    Windows high quality

 RA, RAM         RealNetworks
 AIFF            Macintosh
 AU              Sun
 ACELP.live      VoiceAge
 Ogg Vorbis      Mid to high bitrates
 FLAC            CD quality
 Apple Lossless  High quality

 DSD             High quality (SACD)
 DVD-Audio       High quality

 AptX            Bluetooth audio


 MOVIE/VIDEO CODECSName            Origin

 MPEG-1          Video CD
 MPEG-2          DVD/TV standard
 MPEG-4          Enhanced MPEG-2
 H.264           Enhanced MPEG-4
 H.265 (HEVC)    Enhanced H.264

 VP8             Google
 VP9             Google

 M-JPEG          Motion JPEG

 DV              DV tape camcorders
 HDV             DV tape camcorders
 HDCAM           Tape camcorders
 AVCHD           Tapeless camcorders
 XDCAM           Tapeless camcorders

 DNxHD           Avid post-production
 ProRes          Apple post-production

 FLV             Flash video

 VC-1            SMPTE

 AVI             Windows
 DivX            DivXNetworks
 WMV             Windows
 RM, RV          RealNetworks
 Indeo           Intel
 Cinepak         SuperMac Technologies
 Sorenson        Sorenson Media

 Ogg Theora      HTML5 (VP3 codec)


 VIDEOCONFERENCING CODECSName            Origin

 H.261           ITU
 H.263           ITU


 MOVIE SOUNDTRACK CODECSName            Origin

 MP2             MPEG-2
 Dolby Digital   Dolby Labs
 DTS             DTS, Inc.



Conversion and Compression
Compressing audio and video is a two-stage process. The first stage converts the signals from the source into an uncompressed digital format. At that point, one of several compression algorithms is used to further compress the digital code.
References in periodicals archive ?
The InterTrust platform can now more directly support a wide range of music codecs, software players, platforms and business models of the music industry worldwide.
Developed by Fraunhofer IIS, AAC-LD offers similar audio quality to music codecs with coding delays of only 20 ms instead of 100 ms or more.
It addresses specific topics including digital music downloads, ringtones, streaming music services, digital music codecs and DRM.
It will showcase the latest in portable digital music player technology and removable storage media, holding up to eight hours of high-quality digital music and supporting multiple music codecs.
It supports multiple music codecs including those being adopted by the major record labels, and is approximately the size of a deck of playing cards.
Digital's director of business development, said, "AAC is one of the premiere music codecs and we consider it to be an important addition to our designs.
He continued, "We believe that the Cleo will offer music consumers something they have never seen before: a portable digital music jukebox with a simple user interface; support for multiple music codecs including those being adopted by the major record labels; and the ability to store and play back up to 2000 songs.
Digital's president and chief executive officer, said, "Sony's ATRAC3 is one of the premier music codecs available and it is gaining support from a number of companies in the industry including online music providers.
Our SDMI participation is valuable as we are aware of the latest developments in digital rights management systems (DRMS), music codecs, and watermarking technology.
The flexible design can be adapted to customer specifications and includes support for multiple music codecs, removable memory, and security features.
The flexible design can be adapted to customer specifications and includes options for music codecs, removable memory, and security features.
Digital's reference design into their third-generation music player (see photo) which will support multiple music codecs including ePAC, AAC, WMA, and MP3 and will also support various Digital Rights Management (DRM) schemes.