ITU-T G.729 Annex A Speech Coder for the TMS320C55x Generation

Description

The ITU-T G.729 Annex A fixed-rate speech coder provides toll quality at very low bandwidth. G.729 compresses narrowband linear speech signals at a sample rate of 8kHz to 8kbps, using Conjugate-Structure, Algebraic Code-Excited Linear Prediction (CS-ACELP). The encoder extracts the parameters of the CELP coding model from 10-msec frames. G.729 Annex A is a less mathematically complex version of G.729. It requires roughly one half the cycles of G.729, yet is interoperable with it, with barely any loss of fidelity.

G.729 Annex A encoder is widely used in applications that require robust quality, including videoconferencing, internet, multimedia communications, satellite communications, and store/forward.

The G.729 Annex A is part of the DSP Wizard G.729 suite for TMS320C55x, which is comprised of five separate products:

Features

DSP Wizard’s G.729 Annex A implementation was designed for low resource requirements without sacrificing quality. It executes at 6.4 mips for worst-case data. The speed is at least 25% faster than any other G.729 Annex A c55x implementation available. While it may seem that many DSP software vendors claim to have the best speeds, we can back up our claim. Please compare us to the competition. A 200 MHz c55x chip can support 30 channels.

• Highly optimized for TMS320C55x
• Bit-exact fixed-point implementation per ITU-T test suite
• Fully reentrant—self-preemptible
• Multichannel
• Simple integration into existing systems via C-callable functions
• TI eXpressDSP compliant algorithm
• Release/version 1.0
• Available now
• Delivered as a Zip file

Performance

dspwizard@dspwizard.com