The addition of G.719 pass-through support.
RESAMPLE Codec:
Asterisk 1.4 -> Asterisk 1.6.0
Added a new codec translation module, codec_resample, which re-samples
signed linear audio between 8 kHz and 16 kHz to help support wideband
codecs.
iLBC Codec:
Asterisk 1.4 -> Asterisk 1.6.0
Previously, the Asterisk source code distribution included the iLBC
encoder/decoder source code, from Global IP Solutions
(http://www.gipscorp.com). This code is not licensed for
distribution, and thus has been removed from the Asterisk source
code distribution. If you wish to use codec_ilbc to support iLBC
channels in Asterisk, you can run the contrib/scripts/get_ilbc_source.sh
script to download the source and put it in the proper place in
the Asterisk build tree. Once that is done you can follow your normal
steps of building Asterisk. You will need to run 'menuselect' and enable
the iLBC codec in the 'Codec Translators' category.
ITU G.722.1/G.722.1C:
Asterisk 1.6.1 -> Asterisk 1.6.2
The Asterisk core now supports ITU G.722.1 and G.722.1C media streams, and
can connect calls in passthrough mode, as well as record and play back files.
Speex:
Asterisk 1.6.2 -> Asterisk 1.8
Added support for 16khz Speex audio. This can be enabled by using 'allow=speex16'
during device configuration.