Detecting voice activity

Details Detecting voice activity Detecting voice activity

1995-11-20

1998-03-24

Kuntz, Curtis

Electrical audio signal processing systems and devices

Monitoring of sound

395 242, H04R 2900

Patent

active

057321418

ABSTRACT:
Method and apparatus for detecting voice activity in an audio signal, the method comprising computing the autocorrelation coefficients of the signal, identifying a first autocorrelation vector whose components comprise a first series of autocorrelation coefficients, identifying a second autocorrelation vector whose components comprise a second series of autocorrelation coefficients offset from the first series by a predetermined offset value, subtracting the first autocorrelation vector from the second autocorrelation vector to obtain a differentiation vector, and computing a norm of the differentiation vector, which differentiation vector norm represents a first indicator of voice activity.

REFERENCES:
patent: 3919479 (1975-11-01), Moon et al.
patent: 4282405 (1981-08-01), Taguchi
patent: 4426551 (1984-01-01), Domatsu et al.
patent: 4715065 (1987-12-01), Parker
patent: 4720802 (1988-01-01), Damoulakis et al.
patent: 4797931 (1989-01-01), Furukawa et al.
patent: 4815137 (1989-03-01), Benvenuto
patent: 4872724 (1989-10-01), Satoh et al.
patent: 5276765 (1994-01-01), Freeman et al.
patent: 5410632 (1995-04-01), Hong et al.
K. S. Rafila et al, "Voiced/Unvoiced/Mixed excitation classification of speech using the autocorrelation of the output of an adpcm system", IEEE International Conference On Systems Engineering, Aug. 24, 1989, Fairborn, Ohio, pp. 537-540.

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