Part of the ITU-T's H.323 standard for videoconferencing over non quality-of-service guaranteed LANs.
ITU-T recommendation about an 8-Kbps speech coder using the CS-ACELP or, conjugate-structure algebraic-code-excited linear prediction speech coder. Annexes provide algorithms at 6.4- and 11.8-Kbps, C code and test verification suites.
Describes CELP compression where voice is coded into 8 kbps streams. The two variations of this standard G.729 and G.729 annex A , differ mainly in computational complexity; both provide speech quality similar to 32 kbps ADPCM.
ITU standard algorithm speech encoding/decoding at 8 Kbps.
ITU-T Recommendation for speech coding at 8 kbit/s using conjugate-structure algebraic-code-excited linear prediction (CS-ACELP). http://www.itu.int/rec/recommendation.asp?type=folders&lang=e&parent=T-REC-G.729
An ITU-T algorithm for voice encoding that produces an 80-bit voice sample every 10 msec (bit rate of 8 kbps). The codec works in blocks of 10 msec and so it is possible to generate frames of multiple 10 msec duration.
This vocoder, sometimes known by the abbreviation CS-ACELP (Conjugate Structure Algebraic-Code Excited Linear Prediction), is used in many VoIP gateways. It has a bit rate of 8 Kbits/second. This vocoder algorithm has silence suppression, meaning silence is not transmitted and does not occupy bandwidth. This is a patented vocoder algorithm for which a license fee must be paid.
The G.729 codec is an industry standard which allows for stuffing more calls in limited bandwidth to utilize IP voice in more cost effective ways. A typical call consumes 64Kbps of voice bandwidth. G.729 reduces the call to 8Kbps (normal IP overhead adds to this number). Many people are using Asterisk with G.729 to replace expensive gateways. See also: CODEC, G.711, GSM
8 kbps ACELP codec (medium quality, low bandwidth, high processor load)
8kbps voice compression algorithm .
An ITU-T ACELP codec (8 kbps, medium quality, high processor load).
Audio (Voice) Compression Protocol reducing the required bandwidth per call, per direction to 12 kbps using conjugate-structure algebraic-code-excited linear-predication.
Coding of speech at 8 kbit/s using Conjugate Structure Algebraic-Code-Excited Linear-Prediction (CS-ACELP).
G.729 is an audio data compression algorithm for voice that compresses voice audio in chunks of 10 milliseconds. Music or tones such as DTMF or fax tones cannot be transported reliably with this codec, and thus use G.711 or out-of-band methods to transport these signals.