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Journal Article

A Comparison of Two Types of Digitized Autocorrelation Vocoders

Authors: Howard, Calvin F.; Manley, Harold J.; Stoddard, James C.

Journal of the Audio Engineering Society · Volume 15 · Issue 4 · pp. 404–406 · October 1967

Abstract

Intelligibility test results are presented for two types of 2400 bit/second autocorrelation vocoders. One vocoder directly transmits the digitized coefficients in a Laguerre expansion of the autocorrelation function. The other vocoder contains a resistor matrix which transforms these coefficients to spectrum amplitude values and is therefore compatible with present channel vocoders. A comparison of the effects of fixed vs variable reference spectrum encoding is presented.

Details

Publication
Journal of the Audio Engineering Society
Volume
15
Issue
4
Pages
404–406
Publication date
October 6, 1967
Affiliation
Applied Research Laboratory, Sylvania Electronic Systems, Waltham, MA (See document for exact affiliation information.)
Type
Journal Article