ITU-T G.729 Annex D Speech Coder for the TMS320C54x Generation

Description

The ITU-T G.729 Annex D 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 D compresses speech to a lower bit-rate of 6.4kbps with somewhat lower fidelity compared to the original 8.0kbps rate.

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

The G.729 Annex D is part of the DSP Wizard G.729 suite for TMS320C54x, which is comprised of five separate products:

Features

DSP Wizard’s G.729 Annex D implementation was designed for low resource requirements without sacrificing quality. It executes at 13.0 mips for worst-case data.

• Highly optimized for TMS320C54x
• 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
• Object libraries for near and far models
• Release/version 1.0
• Available now
• Delivered as a Zip file

Performance

dspwizard@dspwizard.com