Speech recognition method and apparatus with noise adaptive...

Details Speech recognition method and apparatus with noise adaptive... Speech recognition method and apparatus with noise adaptive...

2007-05-08

2007-05-08

Dorvil, Richemond (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C238S256000, C238S252000

Reexamination Certificate

active

10163710

ABSTRACT:
In a speech recognition method, at least two standard feature vector series having different signal-to-noise ratios (SNRs) are prepared in advance for each category. Then, an SNR is calculated from an input speech signal, and a noise adaptive standard feature vector series is calculated by a linear interpolation method between the prepared standard feature vector series using the calculated SNR. Finally, a dynamic programming matching operation is performed upon the feature vectors of the noise adaptive standard feature vector series and the feature vectors of the input speech signal.

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Guerchi et al., “Low-rate quantization of spectral information in a 4KB/s pitch-synchronous CELP docer”, IEEE Workshop on Speech Coding, Sep. 2000, p. 111-113.

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