Communications Blockset

Quantizer Decode

Decode quantization index according to codebook

Library

Source Coding

Description

The Quantizer Decode block recovers a message from a quantized signal, converting the quantization index into the corresponding codebook value. The Quantization codebook parameter, a vector of length N, prescribes the possible output values. If the input is an integer k between 0 and N-1, then the output is the (k+1)st element of Quantization codebook.

The input can be either a scalar, a sample-based vector, or a frame-based row vector. This block processes each vector element independently. Each output signal is a vector of the same length as the input signal.

Note    The Sampled Quantizer Encode and Enabled Quantizer Encode blocks also use a Quantization codebook parameter. The first output of those blocks corresponds to the input of Quantizer Decode; the second output of those blocks corresponds to the output of Quantizer Decode.

Dialog Box

Quantization codebook

A real vector that prescribes the output value corresponding to each input integer.

Pair Block

Sampled Quantizer Encode or Enabled Quantizer Encode

QPSK Modulator Baseband

Random Deinterleaver