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A Class of Companded Unity Bit Coders

Chakravarthy, CV (1982) A Class of Companded Unity Bit Coders. In: IEEE Transactions on Communications, 30 (7, par). pp. 1772-1775.

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Abstract

Speech encoding using unity bit coders in the form of delta modulators (DM) has become very popular. Many different designs have been proposed [1]-[3] and implemented in monolithic form [4], [5]. The strategy used in all of these coders is to adapt the "step size" of the coder to suit the input signal power. In the present paper we examine a class of unity bit coders where a basic linear coder is used while the input to this coder is constrained or compressed to be within suitable limits, so as to have the linear coder operating in its optimal range. Results are presented for delta modulators, deltasigma modulators, and a modified unity bit coder, and it is found that some of the coders perform as well as the "conventional" adaptive delta modulators.

Item Type: Journal Article
Additional Information: �©1982 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 27 Jul 2005
Last Modified: 19 Sep 2010 04:19
URI: http://eprints.iisc.ernet.in/id/eprint/3417

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