Speech signal processing apparatus for cutting out a speech sign

Details Speech signal processing apparatus for cutting out a speech sign Speech signal processing apparatus for cutting out a speech sign

1995-05-31

1997-04-01

Tung, Kee M.

395 255, G01L 106

Patent

active

056175051

ABSTRACT:
A band division process including a Fourier transformation is performed for an inputted speech signal, thereby outputting spectrum signals of plural channels. A cepstrum analysis process is performed for the spectrum signals, and a peak of the obtained cepstrum is detected in response to the cepstrum analysis result. Thereafter, a speech signal interval the inputted noisy speech signal is detected in response to the detected peak, and a noise is predicted in the speech signal in response to the detected speech signal interval. Then, the predicted noise is canceled in the spectrum signals thereby outputting noise-suppressed spectrum signals. Finally, the noise-suppressed spectrum signals are combined and are inverse Fourier-transformed, thereby outputting a noise-suppressed speech signal.

REFERENCES:
patent: 4075423 (1978-02-01), Martin et al.
patent: 4100370 (1978-07-01), Suzuki et al.
patent: 4827516 (1989-05-01), Tsukahara et al.
patent: 4837830 (1989-06-01), Wrench, Jr. et al.
patent: 4852181 (1989-06-01), Morito et al.
patent: 4905286 (1990-02-01), Sedgwick et al.
"Cepstral Analysis Technique For Automatic Speaker Verification", Furui, IEEE Transactions On Acoustics, Speech And Signal Processing., vol. 29, No. 2, Apr. 1981, New York, US, pp. 254-272.
"Separation Of Simultaneous Voices", Stubs, Summerfield, Eurospeech 87, European Conference On Speech Technology, vol. 1, Sep. 1987, Edinburgh Scotland, pp. 199-202.
"Word Recognition System With Automatic Selection Of Word Library", Clapper, IBM Technical Disclosure Bulletin, vol. 13, No. 3, Aug. 1970, New York US, p. 731.
"System For Automatic Formant Analysis Of Voiced Speech", Schafer, Rabiner, Journal Of The Acoustical Society Of America, vol. 47, No. 2, Feb. 1970, New York US, pp. 634-648.
"Speech Enhancement", Lim, International Conference On Acoustics Speech And Signal Processing, vol. 4, 7 Apr. 1986, Tokyo Japan, pp. 3135-3142.
"Cepstrum Pitch Determination", Noll, Bell Telephone Laboratories, Murray Hill, NJ, Aug. 1966, pp. 293-309, The Journal of Acoustical Society of America.
"Umgebungsgerauschreduktion bei Sprachkommunikationssystemen", Kroschel, 2213 Frequenz, Feb.-Mar. 1988, Berlin, West Germany, pp. 79-84.
"Techniques for Suppression of an Interfering Talker in Co-Channel Speech", Naylor et al., ITT Defense Communications Divisions, 1987 IEEE, pp. 205-208.
"Acoustic Noise Analysis and Speech Enhancement Techniques for Mobile Radio Applications", Dal Degan et al., Signal Processing 15 (1988), pp. 43-56.
"Cepstral Domain Talker Stress Compensation for Robust Speech Recognition", Yeunung Chen, IEEE Trans. on ASSP, vol. 36, No. 4, Apr. 4, 1988, pp. 433-439.
"Use of Generalized Cepstral Distance Measure in Isolated Word Recognition", Takao Kobayashi, Electronics and Communications in Japan, Part 3, vol. 72, No. 7, Jul. 1989, pp. 1-8.

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