Accession Number : AD0602955

Title :   VOCODER EVALUATION RESEARCH.

Descriptive Note : Final rept.,

Corporate Author : RAYTHEON CO WALTHAM MASS

Personal Author(s) : Meeker,W. F. ; Nelson,A. L.

Report Date : 29 FEB 1964

Pagination or Media Count : 112

Abstract : In support of research in digital speech transmission and speech bandwidth compression, several related tasks were completed. Master tape recordings of speech from 38 male and 19 female talkers were provided using microphones, preamplifiers, and equalizers duplicating those used for speech recordings. Material recorded by each talker consisted of 20 minutes of continuous speech, a regional dialect check list, a nonsense syllable list, and 6 PB word lists. Articulation tests were conducted to evaluate several vocoder configurations and data rates for two experimental vocoders. An analysis was made of phonetic errors for one vocoder configuration. Preliminary work was done toward vocoder evaluation by computer. (Author)

Descriptors :   (*SPEECH TRANSMISSION, DIGITAL SYSTEMS), (*SPEECH COMPRESSION, CODING), VOICE COMMUNICATIONS, RECORDING SYSTEMS, LANGUAGE, SPEECH REPRESENTATION, STATISTICAL TESTS, PREAMPLIFIERS, MICROPHONES

Distribution Statement : APPROVED FOR PUBLIC RELEASE