Accession Number : ADD001404

Title :   Digital Voice Detector.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Pomper,William J ; Wilhelm,Charles G ; Yancey,Leonard M

Report Date : 17 Sep 1974

Pagination or Media Count : 6

Abstract : The patent describes digital apparatus for detecting the presence of voice in a vocoder output signal to produce a push-to-talk (PTT) signal for simplex operation of communication apparatus. When voice is detected by shift register and logic detection apparatus, a signal is generated that sets a hold circuit which supplies a PTT output for generation of an isolated key signal. The hold circuit is reset each time that voice is detected in the vocoder signal; therefore, PTT is maintained until there are no voice signals present during a complete hold period which is switch-selectable. A sampling signal for voice detection and a synchronization signal are supplied to the voice detection circuit by interface circuitry.

Descriptors :   *Communication equipment, *Input output devices, *Patents, Vocoders, Detectors, Digital systems, Voice communications

Subject Categories : Voice Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE