Method and system for performing speech recognition

Details Method and system for performing speech recognition Method and system for performing speech recognition

1995-12-20

1998-09-08

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704226, 374410, G10L 302, G10L 900, H04M 176

Patent

active

058060227

ABSTRACT:
Speech recognition processing is compensated for improving robustness of speech recognition in the presence of enhanced speech signals. The compensation overcomes the adverse effects that speech signal enhancement may have on speech recognition performance, where speech signal enhancement causes acoustical mismatches between recognition models trained using unenhanced speech signals and feature data extracted from enhanced speech signals. Compensation is provided at the front end of an automatic speech recognition system by combining linear predictive coding and mel-based cepstral parameter analysis for computing cepstral features of transmitted speech signals used for speech recognition processing by selectively weighting mel-filter banks when processing frequency domain representations of the enhanced speech signals.

REFERENCES:
patent: 5195132 (1993-03-01), Bowler et al.
Jankowski et al., "A Comparison Of Signal Processing Front Ends For Automatic Word Recognition", IEEE Transactions on Speech and Audio Precessing, vol. 3, No. 4, Jul. 1995. pp. 286-293.
Rabiner et al., "Fundamentals of Speech Recognition" Prentice-Hall, Englewood Cills, NJ, 1993, pp. 103-107, 112-117 and 183-190.

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