Method for compressing a speech signal by using similarity of th

Details Method for compressing a speech signal by using similarity of th Method for compressing a speech signal by using similarity of th

1998-10-08

2000-08-08

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704208, G10L 1902

Patent

active

06101463&

ABSTRACT:
A method for compressing a speech signal by using similarity of the F.sub.1 /F.sub.0 ratios in pitch intervals within a frame. This method comprises the steps of: dividing the speech signal into frames, each being of a predetermined size; checking whether each of the divided frames corresponds to a voiced speech; obtaining an F.sub.1 /F.sub.0 ratio of an initial pitch interval and of subsequent pitch intervals of each frame corresponding to voiced speech; determining if data in each of the subsequent pitch intervals can be regarded as identical to data in the initial pitch interval by calculating if the difference between the obtained F.sub.1 /F.sub.0 ratio corresponding to the subsequent pitch interval and the obtained F.sub.1 /F.sub.0 ratio of the initial pitch interval is smaller than a predetermined value; and compressing data in each of the subsequent pitch intervals if it can be regarded as identical to data in the initial pitch interval according the determining step above.

REFERENCES:
patent: Re32124 (1986-04-01), Atal
patent: 4802221 (1989-01-01), Jibbe
patent: 5020058 (1991-05-01), Holden et al.

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