Displaying 2 results from an estimated 2 matches for "codevectors".
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2000 Dec 20
2
questions re residuevqtrain
...n at the CVS head, last changed around 11/9
or so).
1. I'm thinking that this program is basically supposed to solve the VQ
design problem, as documented on 'http://data-compression.com/vq.html'
(with some variations for vorbis).
In that problem, the goal is to choose the codevectors to minimize average
distortion (average distance between each training vector and its
associated codevector). This measure, or something similar, is given in
the residuevqtrain output as 'metric error'. In the run I did, though,
the value of metric error actually *increase...
2000 Dec 24
1
Codebook Flexibility
...ry bitstream.
Can we, for example, change the volume of the whole sound by scaling
the vectors in the codebook? (My guess is that this wouldn't be enough,
as we have to scale the floor of every frame too). That would be cool.
A similar question about equalizing/filtering by playing with the
codevectors.
A somewhat unrelated question: how different is the MP3 decoding from
Vorbis? Specifically, can we create a lossless mapping utility from
MP3 to Vorbis without re-encoding (using a specialized for this codebook
maybe - although MP3 doesn't use vq).
--
Beni Cherniavsky <cben@crosswinds....