[vorbis-dev] Re: [vorbis] question about codebook

[Segher Boessenkool]

Áô©~ªº ¦Ñ¤H wrote:
> Dear Segher
> 
> Thanks for your information. Besides, the mechanism of the huffman 
> decoding seems can not work in a 24-bit processor if the code length 
> exceeds 24, though I have checked several vorbis file from network and 
> they are all below 24 bit

True; but you can special case the >24 bit codebook to use
a more "traditional" decoding approach.

 > (It there possible for a codebook with
> codelength exceeding 24 bits).

Yes; the Vorbis I spec defines a maximum codeword length of 32 bits.

 > So does it works for using traditional
> huffman decoding (huffman tree tranversal) or it needs to modified to use?

You can certainly just use the traditional algorithm.

> Sorry I am not familiar with arithmetic coding. And thanks a lot ....... :)

You're welcome.

<p>Segher

(vorbis-dev@ cc:'ed; hope you don't mind)

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