Recursive pitch predictor employing an adaptively determined sea

Details Recursive pitch predictor employing an adaptively determined sea Recursive pitch predictor employing an adaptively determined sea

1996-09-30

1998-09-22

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

G10L 500

Patent

active

058129677

ABSTRACT:
A method for improved recursive pitch prediction includes providing a search window for pitch estimates based upon a previously computed pitch, computing pitch estimates for the search window, and determining an optimal pitch from the pitch estimates within the search window for a first predetermined number of frames. The method further includes expanding the search window to a full pitch window after the first predetermined number of frames, and calculating pitch estimates for the full pitch window for a second predetermined number of frames.
A system for improved recursive pitch prediction includes a speech generator of speech signals, and a central processing unit coupled to the speech generator. The central processing unit further is capable of coordinating pitch estimation of the speech signals, including providing a search window for pitch estimates based upon a previously computed pitch, calculating pitch estimates for the search window, and determining an optimal pitch from the pitch estimates within the search window for a first predetermined number of frames.

REFERENCES:
patent: 3979557 (1976-09-01), Schulman et al.
patent: 5127053 (1992-06-01), Koch
patent: 5216747 (1993-06-01), Hardwick et al.
patent: 5491772 (1996-02-01), Hardwick et al.

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