[codec] Codec development update

[Jean-Marc Valin <[e-mail]>]

Hi folks,

Here's a quick update on actual development of the codec. So far, in terms 
of integration, we are still at the experiment stage with the simulated 
files (these were not actual codecs) I sent earlier combining SILK, 
BroadVoice and CELT. The original email is at 
http://www.ietf.org/mail-archive/web/codec/current/msg01241.html and the 
files are at: http://jmvalin.ca/codec_experiment1/

At the same time, CELT has been improved to facilitate potential 
integration within a future codec. These are the changes made so far:

- Reducing the code size
- Improving support for 20 ms frames
- Allowing dynamic switching of frame size (between 2.5, 5, 10 and 20 ms)
- Adding a configuration option for skipping the low frequencies
- Improving the tuning for lower bit-rate speech

Those who want to follow the development from the CELT side (and try the 
latest code) can do so by getting the "master" branch in the git 
repository. See http://git.xiph.org/?p=celt.git for details. Note that this 
code is *not* bit-stream compatible with the latest release (0.7.1), nor 
with the latest I-D (based on 0.6.1).

Cheers,

	Jean-Marc