Method and apparatus for speech signal detection and classificat

Details Method and apparatus for speech signal detection and classificat Method and apparatus for speech signal detection and classificat

1983-01-28

1988-01-19

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

047208627

ABSTRACT:
A method and apparatus for speech signal detection and classification in which a partial auto-correlation and residual power analyzation circuit extracts a normalized first-order partial auto-correlation coefficient and K.sub.1 a normalized zero-order residual power E.sub.N from an input signal, and a sound source analyzation circuit extracts a normalized residual correlation .phi. from the input signal, and in which on the basis of these extracted parameters, speech signals are detected, and, when so detected, the detected speech signals are classified into a voiced sound V, an unvoiced sound U and silence S. The classification of the respective voiced sound, unvoiced sound and silence is determined on the basis of preset threshold values that are mutually considered and which correspond to values of these extracted K.sub.1, E.sub.N and .phi. parameters for establishing boundary values for classifying the input signals into a voiced sound, an unvoiced sound or silence.

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David, E. E. et al, "Note on Pitch Synchronous Processing of Speech" monograph by Bell Telephone System Technical Publications, 1955.
Rabiner, L. R. et al, "Digital Processing of Speech Signals" (Bell Labs, Incorporated, 1978), TK 7882.S65 R3, pp. 401-413.

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