Written by Steve Underwood steveu@coppice.org
Copyright (C) 2005 Steve Underwood
Despite my general liking of the GPL, I place my own contributions to this code in the public domain for the benefit of all mankind - even the slimy ones who might try to proprietize my work and use it to my detriment.
Based on a single channel G.722 codec which is:
***** Copyright (c) CMU 1993 *****
- Computer Science, Speech Group
- Chengxiang Lu and Alex Hauptmann
The G.722 module is a bit exact implementation of the ITU G.722 specification for all three specified bit rates - 64000bps, 56000bps and 48000bps. It passes the ITU tests.
To allow fast and flexible interworking with narrow band telephony, the encoder and decoder support an option for the linear audio to be an 8k samples/second stream. In this mode the codec is considerably faster, and still fully compatible with wideband terminals using G.722.