[vorbis] bitpeeler

[Sebastian Gesemann]

>> I'm not sure that reencoding a vorbis file to a better peelable
>> file by increasing the amount of quantization stages without
>> introducing new quantizazion errors is possible.

On Thu, 17 Apr 2003, Segher Boessenkool wrote:

> Let me just give a small example of how this can be done.
> Where first we had a stage that encodes  0, 1, 2, 3  we change
> it to two stages that encode  0+0, 0+1, 2+0, 2+1.  This doesn't
> take more space if you make the vectors long enough (in fact, it
> almost always takes _less_ space), and it can be better peelable
> if you order those new vectors in a smart way.

I'm sorry, but this only works if your previous first stage is a
linear-quantizer. And AFAIC makes the current Vorbis encoder heavily
use of non-linear quantization.

Or am I missing something ?

>> [...]
>> Did you mean this by 'losslessly reencoding' ?
> 
> With losslessly reencoding, I mean encoding the stream again,
> with different books and modes, but representing exactly the
> same data.

Good luck then.

> Have fun,
> Segher

bye,
Sebastian

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