Accelerated convolution noise elimination

Details Accelerated convolution noise elimination Accelerated convolution noise elimination

1998-02-13

2000-03-28

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704233, G10L 302, G10L 900, G10L 506

Patent

active

060443405

ABSTRACT:
A method and apparatus for removing convolution noise from a signal such a one carrying speech information. The signal is transformed into a log-spectral domain where a smoothed model is fitted to the log-spectrum subject to constraints of concavity and an overall bandpass shape. The smoothed model has quadratic segments of negative curvature and linear segments, the segments being smoothly joined at breakpoints. The model, which may be recursively updated, is subtracted from each log-spectral data vector.

REFERENCES:
patent: 5450522 (1995-09-01), Hermansky et al.
patent: 5537647 (1996-07-01), Hermansky et al.
patent: 5598505 (1997-01-01), Austin et al.
Rabiner, Lawrence, et al, "Fundamentals of Speech Recognition", Prentice Hall, 1993, pp. 95, 96 and 99.
de Veth, Johan, et al, "Comparison of Channel Normalization Techniques for Automatic Speech Recognition Over the Phone", Proceedings ICSLP-96, pp. 2332-2355, 1996.
de Veth, Johan, et al, "Phase-Corrected Rasta for Automatic Speech Recognition Over the Phone", Proceedings ICAASP-97, Apr. 21-24, Munich, Germany, pp. 12339-1242, 1997.
Peter-Pal, Boda, et al "Channel Normalization by Using Rasta Filtering and the Dynamic Cepstrum for Automatic Speech Recognition Over the Phone", Proceedings ESCA Workshop Auditory Basis Speech Perception, pp. 317-320, 1986.
Gales M J F et al: "Robust Spech Recognition in Additive and Convolutional Noise Using Parallel Model Combination" Computer Speech and Language, vol. 9, No. 4, Oct. 1995, pp. 289-307.
Matsumoto H et al: "Smoothed Spectral Subtraction for a Frequency-Weighed HMM in Noisy Speech Recognition" Proceedings Icslp '96, Philadelphia, PA, USA, Oct. 3-6, 1996, ISBN 0-7803-3555-4, 1996, New York, NY, USA, IEEE, USA, pp. 905-908 vol. 2.
Claes et al: "Spectral Estimation and Normalisation for Robust Speech Recognition" Proceedings ICSLP 96. Fourth International Conference on Spoken Language Processing (CAT. No. 96TH8206), Proceeding of Fourth International Conference on Spoken Language Processing. ICSLP'96, Philadelphia, PA, USA, Oct. 3-6, 1996, ISBN 0-7803-3555-4. 1996, New York, NY, USA, IEEE, USA, pp. 1997-2000 vol. 4.
Vereecken H et al: "Noise Suppression and Loudness Normaliztion in an Auditory Model-Based Acoustic Front-end" Proceedings ICSLP 96, Philadelphia, PA, USA, Oct. 3-6, 1996, ISBN 0-7803-3555-4, 1996, New York, NY, USA, IEEE, USA, pp. 566-569 vol. 1.
Strube H W: "Fast Straight-Line-Train Fitting Algorithm for Application With Olive's Speech-Coding Method" Journal of the Acoustic Society of America, May 1978, USA, vol. 63, No. 5, ISSN 0001-4966, pp. 1636-1637.

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