Accession Number : AD0742932

Title :   A Double-Sideband Limiting Radio-Frequency Speech Processor for Increasing the Intelligibility of Speech Signals Over Noisy Single-Sideband Channels.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s) : Belanger,Raymond Louis

Report Date : SEP 1971

Pagination or Media Count : 37

Abstract : The intelligibility of speech transmitted over noisy Single-Sideband channels can be increased by improving the average-to-peak ratio of a speech waveform while generating as few distortion products as possible. Previous studies have shown the effect of various distortion products on intelligibility and have concluded that an SSB clipping processor is ideal, although somewhat expensive and complex. A Double-Sideband Limiting processor was constructed and evaluated against a commercially available SSB-Clipper. Experimental evidence is presented to show that the DSB-Limiting scheme performed as well as the SSB-Clipping processor when the corrupting noise was introduced at audio frequencies. (Author)

Descriptors :   (*SPEECH TRANSMISSION, INTELLIGIBILITY), (*SINGLE SIDEBAND COMMUNICATIONS, SPEECH TRANSMISSION), SPEECH, PROCESSING, LIMITERS, THESES

Subject Categories : Radio Communications
      Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE