[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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