SCIENTIFIC IMPORT NO. 1 DESIGN AND STUDY OF CORRELATION INSTRUMENTATION FOR SPEECH ANALYSIS AND SYNTHESIS

摘要

This report covers the studies leading to the selection of an optimum analog instrumentation for processing the output signal of a Vocoder for digital transmission over a standard voice channel. The system is based upon the matching of the incoming voice events against a catalog of speech patterns so that only the pattern number, rather than the speech event itself, need be transmitted. In the receiver the proper speech pattern is retrieved from a similar memory and gen¬erates the required voltages for the Vocoder synthesizer.nThe recommended system features completely analog processing so that small deviations in the patterns can readily be accommodated. To minimize the number of electronic components and thus increase the equipment reliability, time sequential rather than parallel pattern matching is employed. A single magnetic storage drum is used as the pattern catalog. In duplex operation, it can serve simultaneously as part of the analyzer or synthesizer and can handle any desired number of voice channels.