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CIS750 – Seminar in Advanced Topics in Computer Science Advanced topics in databases – ... - page 14 / 30

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Scalar Quantization

One-dimensional quantizer interval endpoints and levels indicated on a horizontal line

Approximates a source symbol by its closest representative from a codebook

An N-point scalar quantizer Q is a mapping:

                                Q: R C

   where R is the real line and C={y1, y2,…, yN} R is the codebook of size N

Q(x)=D(E(x))  

    where  E: R I  is the encoder and  D: IC  is the decoder I={1,2,…,N}

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