OPTIMAL QUANTIZER DESIGN FOR NOISY CHANNELS.

N. Farvardin, V. Vaishampayan

Research output: Contribution to conferencePaperpeer-review

Abstract

Summary form only given. An analysis of the zero-memory quantization of memoryless sources when the quantizer output is to be encoded and transmitted across a noisy channel is presented. Necessary conditions for the joint optimization of the quantizer and the encoder/decoder pair are presented, and an iterative algorithm for obtaining a locally optimal system is developed. The performance of this locally optimal system, obtained for the class of generalized Gaussian distributions and the binary symmetric channel, is compared against the optimum performance theoretically attainable (using rate-distortion theoretic arguments), as well as against the performance of the Lloyd-Max quantizers encoded using natural binary codes. It is shown that this optimal design could result in substantial performance improvements. The performance improvements are more noticeable at high bit rates and for more broad-tailed densities.

Original languageEnglish
Pages9
Number of pages1
StatePublished - 1986

ASJC Scopus subject areas

  • General Engineering

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