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This page leaves the impression that a codec by definition involves compression. A CODEC mediates transitions between the analog and digital realms. The process of digital sampling imposes truncation in the frequency domain above the Nyquist frequency. However, this is a separate issue from compression.
I believe the acronym CODEC was coined to combine the terms COde DECode. A CODEC includes circuitry or software that
A. encodes analog signals as streams of digital information in one direction, and B. decodes streams of digital information to analog signals in the other direction.
The encoding can be a one-to-one mapping of analog to digital representations. There are variations in which a disproportionate number of bits are devoted to low amplitude signals (companding). Companding does involve a certain kind of compression. Other codecs explicitly compress the analog signal when they convert to digital.
This page is very PC-centric. In fact, it appears to ignore the central role of codecs in telephony. This is ironic, since I believe codecs were initially developed for telephone systems, and remain at the core of such systems.
Humev ( talk) 20:08, 17 April 2008 (UTC)
This article was the subject of a Wiki Education Foundation-supported course assignment, between 16 May 2019 and 24 August 2019. Further details are available on the course page. Student editor(s): MaxLT16384.
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This article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||
|
This page leaves the impression that a codec by definition involves compression. A CODEC mediates transitions between the analog and digital realms. The process of digital sampling imposes truncation in the frequency domain above the Nyquist frequency. However, this is a separate issue from compression.
I believe the acronym CODEC was coined to combine the terms COde DECode. A CODEC includes circuitry or software that
A. encodes analog signals as streams of digital information in one direction, and B. decodes streams of digital information to analog signals in the other direction.
The encoding can be a one-to-one mapping of analog to digital representations. There are variations in which a disproportionate number of bits are devoted to low amplitude signals (companding). Companding does involve a certain kind of compression. Other codecs explicitly compress the analog signal when they convert to digital.
This page is very PC-centric. In fact, it appears to ignore the central role of codecs in telephony. This is ironic, since I believe codecs were initially developed for telephone systems, and remain at the core of such systems.
Humev ( talk) 20:08, 17 April 2008 (UTC)
This article was the subject of a Wiki Education Foundation-supported course assignment, between 16 May 2019 and 24 August 2019. Further details are available on the course page. Student editor(s): MaxLT16384.
Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT ( talk) 14:59, 16 January 2022 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Audio codec. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{
Sourcecheck}}
).
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
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have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 15:22, 21 July 2016 (UTC)