Accession Number : ADA185540

Title :   Activities as an ONT Postdoctoral Fellow.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Kallman, Howard J

PDF Url : ADA185540

Report Date : Jan 1987

Pagination or Media Count : 32

Abstract : The comprehension of narrowband digital speech with bit errors was tested using a sentence verification task. The difficulty of the verification task was varied by using predicates that were either strongly or weakly related to the subjects (e.g., A toad has warts./A toad has eyes.). The test conditions included unprocessed speech and speech processed using a 2400 bit/s linear predictive coding (LPC) voice processing algorithm with random bit error rates of 0%, 2% and 5%. In general, response accuracy decreased and reaction time increased with LPC processing and with increasing bit error rates. Weakly related true sentences and strongly related false sentences were more difficult than their counterparts. Interactions between sentence type and speech processing conditions are discussed. Keywords: Computer applications, Speech analysis, Speech scrambling, Speech recognition.

Descriptors :   *COMPUTER APPLICATIONS, *SPEECH RECOGNITION, ACCURACY, ALGORITHMS, CODING, COMPREHENSION, DIGITAL SYSTEMS, ERRORS, LINEAR SYSTEMS, NARROWBAND, PREDICTIONS, PROCESSING, RATES, REACTION TIME, RESPONSE, SPEECH, SPEECH ANALYSIS, SPEECH SCRAMBLING, WORDS(LANGUAGE), ERROR ANALYSIS, SPEECH TRANSMISSION, MAN COMPUTER INTERFACE

Subject Categories : Linguistics
      Psychology
      Voice Communications
      Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE