A SPECTRALLY AND PERCEPTUALLY WEIGHTED PREDICTIVE CODING TECHNIQUE FOR MOBILE VOICE COMMUNICATIONS APPLICATIONS.

Period of Performance: 01/01/1988 - 12/31/1988

$200K

Phase 2 SBIR

Recipient Firm

Compression Telecommunications
2-233 Professional Drive
Gaithersburg, MD 20879
Principal Investigator

Abstract

A NOVEL SPEECH CODING TECHNIQUE FOR MOBILE VOICE COMMUNICATIONS APPLICATIONS IS PROPOSED. THE TECHNIQUE UTILIZES THE FREQUENCY AND TIME-VARYING PROPERTIES OF SPEECHIN CONJUNCTION WITH A SPEECH QUALITY PERCEPTION CRITERION TOPROVIDE HIGH QUALITY AND NATURAL-SOUNDING SPEECH OVER A WIDERANGE OF BIT RATES (2.4 - 16.0 KBIT/S). THE TECHNIQUE IS ROBUST TO TRANSMISSION ERRORS, PROVIDES A FRAME-WORK FOR VARIABLE BIT RATE CODING OF SPEECH AND IS APPLICABLE TO MARITIME SYSTEMS FOR EFFECTIVE UTILIZATION OF TRANSMISSION BANDWIDTH.