The MPEG-4 Low Delay Audio Coder (AAC-LD) combines the advantages of
perceptual audio coding with low delay necessary for two way communication.
The main requirements are an algorithmic delay of no more than 20 ms and
high audio quality for both speech and music. In this way, the AAC LD coding
scheme bridges the gap between speech and audio coding schemes.
Compared to known speech codecs, the AAC LD codec is capable of coding
both music and speech signals with high quality. Unlike speech coders, the
achieved coding quality scales up with bitrate.
Features
Fully compliant to the ISO MPEG-4 Low Delay codec standard
Profiles supported: LC, LD, LTP
Low CPU usage and memory footprint
Sampling rates from 8 to 96 kHz (compared to 48 kHz for MP3)
Bit rates from 8 Kbps to 576 Kbps for mono and from 16 Kbps to 1152 Kbps for stereo signal
TI C6xx version is fully XDAIS-compliant (including parent/child support for paging tables)
Code is reentrant, supports multithreading and dynamic memory allocation
Benefits
Highly optimized code ideal for resource constrained applications
Easy integration and fast time-to-market
Increases channel capacity and reduces power consumption
