G.723.1A

G.723.1A is the implementation of the ITU G.723.1 standard. It uses Multi-Pulse Maximum Likelihood Quantization (MP-MLQ) and Algebraic Code Excited Linear Prediction (ACELP) speech coding for coding at 6.3 kbps and 5.3 kbps respectively. The coder operates on 30 msec frames of speech sampled at an 8 kHz rate, which together with a 7.5 msec look-ahead results in a total algorithmic delay of 37.5 msec.

Technical Specification

• Supports bit rates 6.3 kbps and 5.3 kbps at 8 khz sample rate
• Voice Activity Detection / Comfort Noise Generation (VAD / CNG)
• C callable API for initialization, encoding and decoding of speech data
• Supports Multi-channel capability
• Optimized implementation
• Bit Compliant with ITU-T test vectors

Applications

• Voice over Internet (VoIP) applications
• Videoconferencing (H.323)
• Multimedia services at low bitrate

Platforms

• Currently supported on TI C64x™ (TMS320C64xx™)and TI C64x+™/DaVinci™ (DM644x™)
• For further details contact mkt@ittiam.com

For a demonstration of G.723.1A capabilities contact mkt@ittiam.com