Problem Statement

• Design of predictive vector quantizers resembles the “chicken-and-egg” problem:

  • Prediction based on quantized samples
    
    
  • Quantizer designed on prediction errors

• Which comes first?

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For the design of a predictive coder, we have what resembles the "chicken-and-egg" problem. Namely, in order to design a quantizer, you need to generate a training set of prediction residulas, but to generate such residuals, then you need a quantizer which you have still to design.