Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1983-04-01
1986-12-02
Shaw, Gareth D.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
364900, 381 41, G10L 500
Patent
active
046270914
ABSTRACT:
An apparatus for detecting and storing digital data corresponding to spoken words carried by acoustic signals includes apparatus for detecting and storing the unvoiced portion of speech which often precedes the voiced portion of a word, even where the amplitude of the unvoiced portion is comparable to the background noise level. The apparatus includes dynamic storage which holds data corresponding to a fixed time period prior to detection of the larger-amplitude voiced segment. Voiced speech is detected when it exceeds a stored value related to the average background noise. At the instant of this detection, the segment of prior data held in the dynamic storage is retained for analysis as unvoiced speech.
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Maginniss Christopher L.
RCA Corporation
Salotto John J.
Shaw Gareth D.
Tripoli Joseph S.
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