Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1985-02-28
1990-06-26
Harkcom, Gary V.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 506
Patent
active
049378694
ABSTRACT:
An acoustic processing unit for a speech recognition system is characterized in that the parameters are extracted from the speech data, including correlation functions, the zero crossing number of the original waveforms, the zero crossing number of the differential waveforms, and the average level of the waveforms. A suitable threshold is selected from a plurality of thresholds preliminarily stored, depending on the inputted speech volume level. The inputted speech volume level of the speaker is detected so that feedback of the detected volume level is obtained. The selected threshold set is then compared with each of the parameters to thereby make the phonemic classification. Because the plurality of threshold sets are thus automatically selected depending on the inputted speech volume level, flexible phonemic classification can be obtained to exactly detect the speech sections.
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Iwahashi Hiroyuki
Ueda Toru
Computer Basic Technology Research Corp.
Harkcom Gary V.
Merecki John A.
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