Re: [codec] Codec development update

[Koen Vos <[e-mail]>]

Here's a similar update about SILK:

We've modified SILK based on general feedback and to make it more  
suited for a hybrid implementation:

- Added a 10 ms frame size mode
- Added resamplers so that the API can now also handle input/output  
signals with 32 or 48 kHz sampling rate
- Added a configuration option to use CELT's range coder
- Reducing program size, mostly through smaller ROM tables (ongoing)

We're working on setting up a git repository for sharing the latest  
version and to facilitate collaboration.

best,
koen.



Quoting Jean-Marc Valin:

> 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
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