Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Patent
1997-01-24
1999-07-27
Hudspeth, David R.
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
704217, G10L 908
Patent
active
059307471
ABSTRACT:
A pitch extraction method and apparatus whereby the pitch of a speech signal having various characteristics can be extracted accurately. The frame-based input speech signal, band-limited by an HPF 12 and an LPF 16, is sent to autocorrelation computing units 13, 17 where autocorrelation data is found. The pitch lag is computed and normalized in the pitch intensity/pitch lag computing units 14, 18. The pitch reliability of the input speech signals, limited by the HPF 12 and the LPF 16, is computed in elevation parameter calculation units. A selection unit 20 selects one of the parameters obtained from the input speech signal, limited by the HPF 12 and the LPF 16, using the pitch lag and the evaluation parameter.
REFERENCES:
patent: 3617636 (1971-11-01), Ogihara
Iijima Kazuyuki
Matsumoto Jun
Nishiguchi Masayuki
Omori Shiro
Hudspeth David R.
Maioli Jay H.
Sony Corporation
Zintel Harold
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