G.729 is a royalty-free [1] 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. [2]

Annex J describes an extension of ITU-T Rec. G.729 for 8-32 kbit/s scalable wideband speech and audio coding algorithm interoperable with G.729 and its Annexes A and B. The details of Annex J are specified and published in ITU-T Rec. G.729.1 in order to provide for an easier maintenance, and to give it a better visibility

G.729. G.729 is considered to offer a good level of call quality at a low bit rate of 8Kbps (kilobits per second), which would mean that you would be able to get more calls through your bandwidth that if you were to use the G.711 Codec.

G.729.1 is an 8-32 kbit/s embedded speech and audio codec providing bitstream interoperability with G.729, G.729 Annex A and G.729 Annex B. [1] Its official name is G.729-based embedded variable bit rate codec: An 8-32 kbit/s scalable wideband coder bitstream interoperable with G.729. It was introduced in 2006.

2017年9月12日 · G.729 offers powerful compression and excellent bandwidth utilization, only consuming 8 kbps per call. It is a licensed codec, meaning users indirectly pay to use the codec when they buy hardware that supports G.729.

When it comes to voice compression algorithms, G.711 and G.729 are two widely used standards in the telecommunications industry. Both codecs serve the purpose of reducing the bandwidth required for transmitting voice signals over IP networks, but they differ in terms of their attributes and performance.

The Adaptive Digital Technologies’ G.729 voice coder software is an implementation of ITU Recommendation G.729 8 kbit/s CS-ACELP Speech Codec. G.729 is an umbrella of vocoder standards. The G.729 vocoders perform voice compression at …

G.729-02 Features: • Passes ITU test vectors. • Common compressed speech frame stream interface to support systems with multiple speech coders (G.729 Annex A/B, G.723, G.728, G.726 et al). • Optimized for high performance on leading edge DSP architectures. • Multi-tasking environment compatible.

G.729/A Speech Coder: Multichannel TMS320C62x Implementation Chiouguey Chen Xiangdong Fu C6000 Applications ABSTRACT This document provides a detailed description of the implementation of the G.729 speech encoder and decoder (codec) on the Texas Instruments (TI ) TMS320C6201 digital signal processor (DSP).

GAO’s G.729, G.729A & G.729AB vocoders provide toll-quality speech with only moderate processing requirements and delay times. They also perform well in the presence of random bit errors. The ITU-T G.729, G.729A & G.729AB standards are based on Code Excited Linear Prediction Model (CELP) and Conjugate-Structure Algebraic CELP (CS-ACELP).