[CELT-dev] Codebook table

Timothy B. Terriberry tterribe at xiph.org
Mon May 9 12:11:25 PDT 2011

> There is a coodebook for the pitch gains stored in pgain_table.h. How
> can we get such a table? I have read in the CELT's paper that the
> codebook is trained, but I do not understand what that realy means. Can
> anyone give me an idea about that?

I don't know what approach Jean-Marc used, but most likely something 
simple and straightforward like Lloyd's algorithm:
or LBG: http://en.wikipedia.org/wiki/Linde–Buzo–Gray_algorithm

However, CELT no longer uses the pitch predictor described in that 
paper, and thus no longer requires its trained codebooks.

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