Re: VQ and Huffman codebooks creation
Sampo Syreeni <[email protected]>
| Newsgroups | gmane.comp.multimedia.ogg.vorbis.devel |
|---|---|
| Message-ID | <[email protected]> |
On 2009-08-16, Ralph Giles wrote: > In the libvorbisenc implementation the codebooks are pre-generated > based on training data, and a set are selected based on the quality > setting. Or in other words, while Vorbis allows variable codebooks, 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, not something that is adapted separately to each and every encoded track. Adapting the codebook on the fly would be something of a research challenge. -- Sampo Syreeni, aka decoy - [email protected], http://decoy.iki.fi/front +358-50-5756111, 025E D175 ABE5 027C 9494 EEB0 E090 8BA9 0509 85C2