Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1991-12-16
1993-05-25
Shaw, Dale M.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
381 30, 381 37, 381 49, 329315, 329347, G10L 500, H03D 300
Patent
active
052147088
ABSTRACT:
A method and apparatus for extracting information from human speech are dislosed. A speech signal is received into a bank of bandpass filters and the instantaneous amplitude modulation and frequency modulation of each harmonic in the speech waveform is determined. A logarithm of the instantaneous frequency of the speech fundamental frequency is determined, for example, by computing a weighted average of the frequency modulations of the harmonics. An output signal is formed having the logarithm of the frequency of the thus determined speech fundamental and the logarithms of the amplitude modulation for the ten lowest frequency speech harmonics and/or the speech envelope.
REFERENCES:
patent: 4001702 (1977-01-01), Kaufman
patent: 4492926 (1985-01-01), Kusakabe et al.
patent: 4499605 (1985-02-01), Garskamp
patent: 4864591 (1989-09-01), Nowell
patent: 4885546 (1989-12-01), Araki
patent: 4928068 (1990-05-01), Main
Eye, Brain, and Vision, David H. Hubel, Scientific American Library, 1988, pp. 182-189.
Speech Communication Human and Machine, D. O'Shaughnessy, Addison-Wesley Publishing Company, pp. 222-225.
Wavelets And Signal Processing, O. Rioul et al, IEEE SP Magazine, Oct. 1991, pp. 14-38.
Pitch Perception And The Segregation And Integration Of Auditory Entities, W. Hartman, Chapter 21, Offprints from Auditory Functionin, 1988, pp. 623-645.
Hearing A Mistuned Harmonic In An Otherwise Periodic Complex Tone, W. Hartmann, J. Acoust. Soc. Am. 88(4), Oct. 1990, pp. 1712-1724.
Wavelet Propagation And Sampling Theory, Morlet et al, Geophysics, vol. 47, No. 2, Feb. 1982, pp. 203-221 (p. 206).
Filter Technique Offers Advantages For Instantaneous Frequency Measurement, L. Chappell, MSN & CT Jun. 1986, pp. 112-117.
Shaw Dale M.
Tung Kee M.
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