G.719

G.719 is an ITU-T standard audio codec providing high quality, moderate bit rate (32 to 128 kbit/s) wideband (20 Hz - 20 kHz audio bandwidth, 48 ksps) audio coding at low computational load. It was produced through a collaboration between Polycom and Ericsson.

G.719 incorporates elements of Polycom's Siren22 codec (22 kHz) and Ericsson codec technology, as well as Polycom's Siren7 and Siren14 codecs (G.722.1 and G.722.1 Annex C), which have been used in videoconferencing systems for many years. As ITU-T Recommendation G.719, it was approved on June 13, 2008.

G.719 is optimized for both speech and music. It is based on transform coding with adaptive time-resolution, adaptive bit-allocation and low complexity lattice vector quantization. The computational complexity is quite low (18 floating-point MIPS) for an efficient high-quality compressor. The codec operates on 20 ms frames, and the algorithmic delay end-to-end is 40 ms.

Licensing

G.719 is licensed by Polycom, Inc. and by Ericsson; both licenses are necessary for use. Polycom licensees also receive the right to use G.722.1 (Siren7, Polycom's 7 kHz codec), and G.722.1 Annex C (Siren14, the 14 kHz equivalent).

See also

* G.711 (a-law and mu-law/u-law)
* G.718
* G.719
* G.722
* G.722.1
* G.722.2
* G.723
* G.723.1
* G.726
* G.728
* G.729
* G.729a
* List of codecs

External links

* [http://www.polycom.com/usa/en/company/about_us/technology/siren_g7221/siren_g7221.html Polycom Siren/G 722.1 Page]
* [http://www.polycom.com/usa/en/company/about_us/technology/siren14_g7221c/siren14_g7221c.html Polycom Siren14 G.722.1C Page]
* [http://www.itu.int/rec/T-REC-G.719/en Official ITU-T G.719 standard]
* [http://hdvoice.tmcnet.com]