[theora-dev] Experimental release of Ghost/CELT 0.0.1

David Kuehling dvdkhlng at gmx.de
Mon Dec 10 15:22:39 PST 2007

>>>>> "Jean-Marc" == Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> writes:

>> Not bad.  I somewhat had the impression that the non-adaptive huffman
>> coding was one thing holding patent free codecs (ie Vorbis, Theora)
>> back.
>> So any chance we're also going to see upgrades to Vorbis, Theora? :)

> No, that would break compatibility. You need a new codec. 

You mean something like Vorbis v2?  Lots of the frontend code could stay
the same, I guess.  And the user would only need to add a command line
option to 'oggenc' :)

>> Hmm, your code compiles, but I don't seem to find the bitrate knob.
>> I guess this is because it's not yet implemented?

> It's very crude, there's mode1 (37 kbps) and mode2 (57 kbps) that you
> can use (and mode3 doesn't work). Don't worry, it's not intended to
> stay like that.

'mode1' is already set as default.  So maybe mode2 is 37 kbps?  Just ran
a test with mode2, I hear some artifacts, but they sound unlike what I'm
used to.  The voice sample sounds unaltered on my low-tech equipment.
Very neat indeed.


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