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2023-10-29T15:41:03Z

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'''G.729''' is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length of 10 milliseconds. It is officially described as Coding of speech at 8 kbit/s using code-excited linear prediction speech coding (CS-ACELP), and was introduced in 1996.

* G.729: This is the original codec using a high-complexity algorithm.
* G.729A or Annex A: This version has a medium complexity, and is compatible with G.729. It provides a slightly lower voice quality.
* G.729B or Annex B: This version extends G.729 with silence suppression, and is not compatible with the previous versions.
* G.729AB: This version extends G.729A with silence suppression, and is only compatible with G.729B.
* G.729.1 or Annex J: This version extends G.729A and B with scalable variable encoding using hierarchical enhancement layers. It provides support for wideband speech and audio, using modified discrete cosine transform (MDCT) coding.

== Links ==
* [https://www.itu.int/rec/T-REC-G.729 Homepage]
* [https://en.wikipedia.org/wiki/G.729 Wikipedia]
* [https://github.com/jongoochgithub/GroovyCodecs GroovyCodecs] - C# G.729 encoder / decoder based on libjitsi/Atlassian code

G.729 - Revision history

Parchivist: Created page with "{{FormatInfo |formattype=electronic |subcat=Audio and Music }} '''G.729''' is a royalty-free narrow-band vocoder-based audio data compression algorithm using a frame length o..."