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Discussion Groups | Comp.DSP | Vector Quantization query

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Vector Quantization query - FruitfulToon - 14:54 02-02-05

Hi,

I'm currently coding an adaption of the LBG vector quantization algorithm.

At the point where you have attributed each vector to one of the code 
vectors, you must calculate the centroid of those vectors to become the new 
centroid of the code vectors.

My question is this. If no vectors have been attributed to that particular 
code vector, then do you simply leave the code vector at its current value?

Thanks,

Tom 



Re: Vector Quantization query - Raymond Toy - 10:38 03-02-05



>>>>> "FruitfulToon" == FruitfulToon  <m...@warwick.ac.uk> writes:

    FruitfulToon> Hi,
    FruitfulToon> I'm currently coding an adaption of the LBG vector quantization algorithm.

    FruitfulToon> At the point where you have attributed each vector to one of the code 
    FruitfulToon> vectors, you must calculate the centroid of those vectors to become the new 
    FruitfulToon> centroid of the code vectors.

    FruitfulToon> My question is this. If no vectors have been attributed to that particular 
    FruitfulToon> code vector, then do you simply leave the code vector at its current value?

You could, but that kind of wastes one of your code vectors.  Might as
just remove it and maybe split one of the nearby code vectors into
two, to keep the same number of codes.

Ray