[CELT-dev] CELT 0.11.1 is out

Timothy B. Terriberry tterribe at xiph.org
Tue Feb 15 10:55:52 PST 2011

> The API should also be close to the final API. Compared to 0.10.x there
> are also small quality improvements, mostly at high bit-rate.

Jean-Marc tends to forget how long ago 0.10.x was... there were actually 
some substantial improvements at low rates, including his new 
"anti-collapse" feature which prevents total energy collapse right 
before transients (the anti-pre-echo described in Monty's CELT demo: 
http://people.xiph.org/~xiphmont/demo/celt/demo.html) for 10 and 20ms 
frames. A number of other minor changes also accumulated into some 
substantial quality gains at low rates, larger even than the ones at 
high rates, especially for smaller frame sizes.

The encoder should also no longer fail when it runs out of room for the 
coarse energy (which, being variable-sized, was hard for a caller to 
predict), or any other coded values. This means it should now be safe to 
run CELT at unreasonably low rates (down to 2 bytes/frame).

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