1# libg722
2
3## Introduction
4
5The G.722 module is a bit exact implementation of the ITU G.722 specification
6for all three specified bit rates - 64000bps, 56000bps and 48000bps. It passes
7the ITU tests.
8
9To allow fast and flexible interworking with narrow band telephony, the
10encoder and decoder support an option for the linear audio to be an 8k
11samples/second stream. In this mode the codec is considerably faster, and
12still fully compatible with wideband terminals using G.722.
13
14## History
15
16The code was originally written by Milton Anderson <milton@thumper.bellcore.com>
17from BELLCORE, and has been modified by the Chengxiang Lu and Alex Hauptmann
18from the Speech Group, School of Computer Science, Carnegie Mellon University,
19to be fairly fast and efficient, while retaining high fidelity.
20
21Steve Underwood <steveu@coppice.org> improved the code a lot later on and
22contributed it into several popular open source projects.
23
24Librarized by Sippy Software, Inc.
25
26## License
27
28This code is mostly Public Domain. Library test code is under BSD 2-clause
29license.
30
31See LICENSE for copyright details and each individual file for specifics.
32