Title:
METHOD OF IDENTIFYING BASIC PITCH PERIOD OF SPEECH SIGNAL
Document Type and Number:
Japanese Patent JPS5774800
Kind Code:
A
Abstract:
Pitch periods in a complex speech signal are determined by evaluating the error in predicting the value of a sample of the signal on the basis of past sample values, and by locating samples for which the prediction error is large. Advantageously, the prediction error signal is devoid of all formant structure, so that there is no chance of confusing pitch signal peaks with formant peaks. A voiced-unvoiced decision is obtained from the ratio of the mean-squared value of the speech signal to the mean-squared value of the prediction error signal.
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Inventors:
BISHNU SAROOP ATAL (US)
Application Number:
JP9367681A
Publication Date:
May 11, 1982
Filing Date:
June 17, 1981
Export Citation:
Assignee:
WESTERN ELECTRIC CO (US)
International Classes:
G10L25/90; G10L25/93; (IPC1-7): G10L1/00
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