Method and system for adaptive speech enhancement using frequenc

Details Method and system for adaptive speech enhancement using frequenc Method and system for adaptive speech enhancement using frequenc

1996-09-27

2000-08-01

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

G10L 302

Patent

active

060980389

ABSTRACT:
A method and system for adaptively filtering a speech signal in order to suppress noise in the signal. The method includes decomposing the signal into multiple frequency subbands, each having a center frequency, estimating a signal-to-noise ratio for each subband, and providing multiple filters, each filter designed for one of a number of selected signal-to-noise ratio independent of the center frequencies of the subbands. The method also includes selecting a filter for filtering each subband, where the filter selected depends on the signal-to-noise ratio estimated for the subband, filtering each subband according to the filter selected, and combining the filtered subbands to provide an estimated filtered speech signal. The system includes appropriate hardware and software for performing the method.

REFERENCES:
patent: 3803357 (1974-04-01), Sacks
patent: 4052559 (1977-10-01), Paul et al.
patent: 4177430 (1979-12-01), Paul
patent: 4630305 (1986-12-01), Borth et al.
patent: 4658426 (1987-04-01), Chabries et al.
patent: 4737976 (1988-04-01), Borth et al.
patent: 4761829 (1988-08-01), Lynk, Jr. et al.
patent: 4799179 (1989-01-01), Masson et al.
patent: 4811404 (1989-03-01), Vilmur et al.
patent: 4937873 (1990-06-01), McAulay et al.
patent: 4942607 (1990-07-01), Schoder et al.
patent: 5008939 (1991-04-01), Bose et al.
patent: 5012519 (1991-04-01), Adlersberg et al.
patent: 5148488 (1992-09-01), Chen et al.
patent: 5214708 (1993-05-01), McEachern
patent: 5253298 (1993-10-01), Parker et al.
patent: 5285165 (1994-02-01), Renfors et al.
patent: 5355431 (1994-10-01), Kane et al.
patent: 5432859 (1995-07-01), Yang et al.
patent: 5434947 (1995-07-01), Gerson et al.
patent: 5450522 (1995-09-01), Hermansky et al.
patent: 5485524 (1996-01-01), Kuusama et al.
patent: 5524148 (1996-06-01), Allen et al.
patent: 5577161 (1996-11-01), Ferrigno
patent: 5590241 (1996-12-01), Park et al.
M. Sambur, "Adaptive Noise Canceling For Speech Signals," IEEE Trans. ASSP, vol. 26, No. 5, pp. 419-423, Oct., 1978.
Y. Ephraim and H.L. Van Trees, "A Signal Subspace Approach For Speech Enhancement," IEEE Proc. ICASSP, vol. II, pp. 355-358, 1993.
Y. Ephraim and H.L. Van Trees, "A Spectrally-Based Signal Subspace Approach For Speech Enhancement," IEEE ICASSP Proceedings, pp. 804-807, 1995.
S. F. Boll, "Suppression Of Acoustic Noise In Speech Using Spectral Subtraction," Proc. IEEE ASSP, vol. 27, No. 2, pp. 113-120, Apr., 1979.
G.S. Kang and L.J. Fransen, "Quality Improvement of LPC-Processed Noisy Speech By Using Spectral Subtraction, " IEEE Trans. ASSP37:6, pp. 939-942, Jun. 1989.
M. Viberg and B. Ottersten, "Sensor Array Processing Based On Subspace Fitting," IEEE Trans. ASSP, 39:5, pp. 1110-1121, May, 1991.
L. L. Scharf, "The SVD And Reduced-Rank Signal Processing," Signal Processing 25, pp. 113-133, Nov., 1991.
H. Hermansky and N. Morgan, "RASTA Processing Of Speech," IEEE Trans. Speech And Audio Proc., 2:4, pp. 578-589, Oct., 1994.
H. Hermansky, E.A. Wan and C. Avendano, "Speech Enhancement Based On Temporal Processing," IEEE ICASSP Conference Proceedings, pp. 405-408, Detroit, MI, 1995.
D. L. Wang and J. S. Lim, "The Unimportance Of Phase In Speech Enhancement," IEEE Trans. ASSP, vol. ASSP-30, No. 4, pp. 679-681, Aug. 1982.
H. G. Hirsch, "Estimation Of Noise Spectrum And Its Application To SNR-Estimation And Speech Enhancement,", Technical Report, pp. 1-32, Intern'l Computer Science Institute.
A. Kundu, "Motion Estimation By Image Content Matching And Application To Video Processing," to be published ICASSP, 1996, Atlanta, GA.
Harris Drucker, "Speech Processing In A High Ambient Noise Environment," IEEE Trans. Audio and Electroacoustics, vol. 16, No. 2, pp. 165-168, Jun., 1968.
John B. Allen, "Short Term Spectral Analysis, Synthesis, and Modification by Discrete Fourier Transf.", IEEE Tr. on Acc., Spe. & Signal Proc ., vol. ASSP-25, No. 3, Jun. 1977.
"Signal Estimation from Modified Short-Time Fourier Transform," IEEE Trans. on Accou. Speech and Signal Processing , Vo. ASSP-32, No. 2, Apr., 1984.
Simon Haykin, "Neural Works --A Comprehensive Foundation," 1994.
K. Sam Shanmugan, "Random Signals: Detection, Estimation and Data Analysis," 1988.
H. Kwakernaak, R. Sivan, and R. Strijbos, "Modern Signals and Systems," pp. 314 and 531, 1991.

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