[Vorbis-dev] VQ and Huffman codebooks creation

[Gregory Maxwell]

On Mon, Aug 17, 2009 at 5:21 AM, Jesús Díaz
Vico<jesus.diaz.vico at gmail.com> wrote:
> Ok, thanks for your answers, they've been all very helpfull.
>
> But
>
>> "currently the codebook is constant over all of the encoded files. It's an
>> average case codebook, statically compiled against a typical training set of
>> tracks,"
>
> actually poses me a new question, of a more _philosophical_ nature. If the
> codebooks are obtained in that way, why don't just say "I'm using codebook
> N" instead of packing the whole codebook within the setup header? I suppose
> the reason is to let people create their own codebooks (may be specialized
> in some specific kind of audio) and therefore obtain standalone audio files.
> Am I right?

Because they can, and actually have, changed from encoder version to
encoder version.