Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1991-05-28
1993-07-13
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 500
Patent
active
052280888
ABSTRACT:
A voice signal processor features a particular improvement of the S/N ratio. In the voice signal processor, the signal level in the voice band of a signal from which noise is cancelled to some extent is emphasized relative to the signal level in the noise band. Moreover, a cancellation factor is utilized in cancelling the noise, so that the voice level in the voice band is emphasized, or the noise level in the noise band is attenuated, achieving a better noise-suppressed voice signal.
REFERENCES:
"Cepstrum Pitch Determination", A. Michael Noll, Bell Telephone Laboratories, Murray Hill, N.J., The Journal of the Acoustical Society of America, Aug. 1966, pp. 293-309.
"Separation of Speech from Interfering Speech by Means of Harmonic Selection", Thomas W. Parsons, J. Acoust. Soc. Am., vol. 60, No. 4, Oct. 1976, pp. 911-918.
"Noisy Speech Enchancement: A Comparative Analysis of Three Different Techniques", Audisio et al., 53(1984) Maggio-giugno, No. 3, Milano, Italia, pp. 190-195.
"Algorithms for Separating the Speech of Interfering Talkers: Evaluations with Voiced Sentences, and Normal-Hearing and Hearing Impaired Listeners", Stubbs et al., J. Acoust. Soc. Am. 87(1), Jan. 1990, pp. 359-372.
Kane Joji
Nohara Akira
Kemeny Emanuel S.
Matsushita Electric - Industrial Co., Ltd.
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