Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
Patent
1991-05-28
1993-06-15
Kemeny, Emanuel S.
Electrical audio signal processing systems and devices
One-way audio signal program distribution
Public address system
G10L 500
Patent
active
052206106
ABSTRACT:
A signal processing apparatus extracts a speech signal from an inputted noisy speech signal. In the signal processing apparatus, a band division process including a Fourier transformation is performed for an inputted speech signal, thereby outputting spectrum signals of plural channels, and a cepstrum analysis process is performed for the spectrum signals of plural channels, thereby outputting a cepstrum analysis result. Thereafter, a speech signal interval of the inputted noisy speech signal is detected in response to the cepstrum analysis result, and then, a speech signal is extracted from the inputted noisy speech signal according to the detected speech signal interval.
REFERENCES:
patent: 4286116 (1981-08-01), Sadou
patent: 4959865 (1990-09-01), Stettiner
"Cepstrum Pitch Determination", A. Michael Noll, The Journal of the Acoustical Society of America, vol. 41, No. 2, 1967, pp. 293-309.
"Separationof Speech from Interfering Speech by Means of Harmonic Selection", Thomas W. Parson, J. Acoust. Soc. Am., vol. 60, No. 4, Oct. 1976, pp. 911-918.
Kane Joi
Nohara Akira
Kemeny Emanuel S.
Matsushita Electric - Industrial Co., Ltd.
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