Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1983-01-31
1987-03-24
Kemeny, E. S. Matt
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 500
Patent
active
046530983
ABSTRACT:
A plurality of pitch period candidates are selected from a peak of correlation of a speech waveform in a current frame from which a pitch period is to be extracted, and a speech pitch is selected from the candidates by referring to a guide index which is precalculated based on pitch periods extracted in past frames. The guide index is an average of the pitch periods in the past frames.
REFERENCES:
patent: 3740476 (1973-06-01), Atal
patent: 3852535 (1974-12-01), Zurcher
patent: 3947638 (1976-05-01), Blankinship
patent: 4004096 (1977-01-01), Bauer et al.
Miyamoto Takanori
Nakata Kazuo
Hitachi , Ltd.
Kemeny E. S. Matt
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