Pitch extracting method for a speech processing unit

Details Pitch extracting method for a speech processing unit Pitch extracting method for a speech processing unit

1997-02-28

1999-01-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, G10L 900

Patent

active

058647910

ABSTRACT:
A method of extracting at least one pitch from every frame of a speech signal, which includes the steps of generating a number of residual signals revealing high and low points of the speech signal within a frame, and taking one of those residual signals which satisfies a predetermined condition among the generated residual signals, as the pitch. In the step of generating the residual signals, the speech is filtered using a FIR-STREAK filter which is a combination of the finite impulse response (FIR) filter and a STREAK filter, and the filtration result is output as the residual signal. In the step of generating the pitch, only the residual signal whose amplitude is over a predetermined value, and the residual signal whose temporal interval is within a predetermined period of time is generated as the pitch.

REFERENCES:
patent: 4701954 (1987-10-01), Atal
patent: 4845753 (1989-07-01), Yasunaga
patent: 5091944 (1992-02-01), Takahashi
patent: 5189701 (1993-02-01), Jain
patent: 5657419 (1997-08-01), Yoo et al.
patent: 5680426 (1997-10-01), Ching-Ming

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