Why should I use an MPEG-4 speech coder instead of an ITU codec?
The ITU-T speech coders currently operate at 6.3/5.3 (G.723), 8 kbps (G.729),16 kbps (G.728), 32 kbps (G.721) 48/56/64 Kbps (G.722). MPEG-4 speech coders operate at bit rates between 2 – 24 kbps for the 8 kHz mode and 14-24 kbps for the 16 kHz mode. Currently ITU-T coders do not operate at bitrates as low 2 kbps for the 8 kHz mode, or 14-24 kbps for the 16 kHz mode. Furthermore, MPEG-4 speech coders provide bitrate scaleability, complexity scalability and multi-bitrate operation from 2 – 24 kbps. The coding quality of the coder is comparable to that of the ITU coder at corresponding bitrates. MPEG-4 is standardising a speech coder which can operate down to 2.0kbps. This will be the lowest bit rate international standard. ITU standards do not support this low bit rate. The quality at 2.0 kbps is “communication quality” and could be used for usual conversation, and better than FS1016 4.8kbps coder. You could utilise the benefits of the MPEG-4 speech coder in various applications. The MPE
