CELT codec 0.6.0 released [LWN.net]

From:		Jean-Marc Valin <jean-marc.valin-AT-usherbrooke.ca>
To:		lwn-AT-lwn.net
Subject:		Including the CELT codec releases in the development news
Date:		Mon, 06 Jul 2009 22:46:21 -0400
Message-ID:		<4A52B6FD.4040809@usherbrooke.ca>
Archive-link:		Article, Thread

Hi,

I'm the author of the CELT codec (http://www.celt-codec.org/), a new
Xiph.Org codec and I thought it would be interesting to add it to the
LWN.net development news. It turns out that I just released CELT 0.6.0
this week and submitted it as an IETF Internet draft:
http://www.ietf.org/internet-drafts/draft-valin-celt-code...

Release announcement:
This release brings in many quality improvements, including better
stereo coupling, better handling of transients, and better handling of
highly tonal signals. In addition, packet loss robustness has been
improved through the optional use of independent (intra) frames. CELT
now supports a larger dynamic range, suitable for encoding 24-bit audio
(float version only). There is also a very early VBR implementation.

Cheers,

	Jean-Marc (also author of the Speex codec)

(Log in to post comments)

good stuff

Posted Jul 9, 2009 20:19 UTC (Thu) by nettings (subscriber, #429) [Link]

haven't tried this release yet, but i was following git until 3 weeks ago or so, and i must say this codec performs very well.
can't quite reach the quality vs. bitrate ratio of vorbis, but then celt is aimed at giving you very very low latency. having played some internet jam sessions using an experimental netjack version that incorporates celt, i'm quite impressed.

good stuff

Posted Jul 22, 2009 5:12 UTC (Wed) by gmaxwell (subscriber, #30048) [Link]

You might want to give the VBR mode a spin if you're not too bandwidth starved. It closes some of the gap verses Vorbis.

Of course, Vorbis works better: Encoding with a tiny frame size is like playing golf with a pool cue. ... I don't think we originally expected CELT to outperform modern MP3 encoders, but it does.