Voiced/unvoiced decision using sequential decisions

Details Voiced/unvoiced decision using sequential decisions Voiced/unvoiced decision using sequential decisions

1982-09-23

1986-05-13

Kemeny, E. S. Matt

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 100

Patent

active

045891311

ABSTRACT:
Speech signal is decided voiced or unvoiced by a sequence of unilateral decisions: a first test decides "unvoiced" if standardized energy E.sub.s is below a threshold, or "ambiguous" if above the threshold whereby a second test decides "unvoiced" if the number of zero crossings ZC is above a threshold, and ambiguous if below the threshold. Up to six criteria may be so tested as ambiguous before a "voiced" decision is made.

REFERENCES:
patent: 2908761 (1959-10-01), Raisbeck
patent: 3083266 (1963-03-01), Mathews et al.
patent: 3102928 (1963-09-01), Schroeder
patent: 4004096 (1977-01-01), Bauer et al.
patent: 4074069 (1978-02-01), Tokura et al.
patent: 4281218 (1981-07-01), Chuang et al.
B. S. Atal and L. R. Rabiner, "A Pattern Recognition Approach to Voiced-Unvoiced-Silence Classification with Applications to Speech Recognition", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-24, No. 3, pp. 201-212, Jun. 1976.
L. R. Rabiner, "Application of an LPC Distance Measure to the Voiced-Unvoiced-Silence Detection Problem", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-25, No. 4, pp. 338-343, Aug. 1977.
Y. Yatsuzuka and T. Ichikawa, "A Speech Detection System", Proceedings of the Fourth International Joint Conference on Pattern Recognition, pp. 1000-1002, Nov. 1978.

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