Decision-directed frame-synchronous adaptive equalization filter

Details Decision-directed frame-synchronous adaptive equalization filter Decision-directed frame-synchronous adaptive equalization filter

1997-05-05

1999-01-26

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704242, 704256, G10L 302

Patent

active

058648062

ABSTRACT:
For equalizing a speech signal constituted by an observed sequence of successive input sound frames, which speech signal is liable to be affected by disturbances, the speech signal is modelled by means of a hidden Markov model and, at each instant t: equalization filters are constituted in association with the paths in the Markov sense at instant t; at least a plurality of the equalization filters are applied to the frames to obtain, at instant t, a plurality of filtered sound frame sequences and an utterance probability for each of the paths respectively associated with the equalization filters applied; the equalization filter corresponding to the most probable path in the Markov sense is selected; and the filtered frame supplied by the selected equalization filter is selected as the equalized frame.

REFERENCES:
patent: 5590242 (1996-12-01), Juang et al.
patent: 5664059 (1997-09-01), Zhao
patent: 5778336 (1998-07-01), Chou et al.
patent: 5806029 (1998-09-01), Buhrke et al.
Database Inspec Institute of Electrical Engineers, Stevenage GB Inspec No. 5027846, Seymour et al. : "An HMM-based cepstral-domain speech enhancement system" XP002024668 -abstract -& International Conference on Spoken Language Processing 1994, vol. 3, 18-22, Sep. 1994, Yolohama , JP, pp. 1595-1598.
International Conference on Acoustics, Speech, and Signal Processing 1988, vol. 1, Apr. 11-14 1988, New York, NY, US. pp. 533-536, XP002024667 -Ephraim et al. : "On the application of hidden Markov models for enhancing noisy speech" -.sctn.4.
International Conference on Acoustics, Speech, and Signal Processing 1992, vol. 1, 23 -26, Mar. 1992, San Francisco, CA, US, pp. 289-292, XP000341140 --Ephraim : "Speech enhancement using state dependent dynamical system model"-.sctn.IV.
Lionel DelphinPoulat and Chafic Mokbel, "Frame-Synchronous Adaptation of Cepstrum by Linear Regression, " Proc. 1997 IEEE Workshop on Automatic Speech Recognition and Understanding, pp. 420-427, Dec. 1997.

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