Communications Toolbox

Scalar Quantization Example 1

The code below shows how the quantiz function uses partition and codebook to map a real vector, samp, to a new vector, quantized, whose entries are either -1, 0.5, 2, or 3.

partition = [0,1,3];
codebook = [-1, 0.5, 2, 3];
samp = [-2.4, -1, -.2, 0, .2, 1, 1.2, 1.9, 2, 2.9, 3, 3.5, 5];
[index,quantized] = quantiz(samp,partition,codebook);
quantized

The output is below.

quantized =

  Columns 1 through 6 

   -1.0000   -1.0000   -1.0000   -1.0000    0.5000    0.5000

  Columns 7 through 12 

    2.0000    2.0000    2.0000    2.0000    2.0000    3.0000

  Column 13 

    3.0000

Representing Codebooks

Scalar Quantization Example 2

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