Speech adaptation device suitable for speech recognition device

Details Speech adaptation device suitable for speech recognition device Speech adaptation device suitable for speech recognition device

1996-01-26

1998-10-06

Tung, Kee M.

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

704252, 704243, G01L 506

Patent

active

058192239

ABSTRACT:
A speech adaptation device comprises a vocabulary independent reference pattern memory for memorizing a plurality of vocabulary independent reference patterns having one or more categories. Each category has one or more acoustic units, and has such a connection relation of the acoustic units that allows reception of any sequence of the acoustic units appearing in the input speech. A preliminary matching unit is for use in making time-alignment between the time series of the feature vectors of the input speech obtained from the analysis unit and the vocabulary independent reference pattern to obtain mean vectors for individual categories of the input speech and the vocabulary independent reference pattern from the aligned portion for the individual categories of the feature vectors of the input speech and the vocabulary independent reference pattern. An adaptation unit is for use in making correction of at least one of the time series of the feature vectors of the input speech and the vocabulary independent reference pattern by using the mean vectors for each category calculated by the preliminary matching unit.

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Rosenberg et al., "Cepstral Channel Normalization Techniques for HMM-Based Speaker Verification", Proceedings of ICSLP94, S31.1, (1994) p. 1835-1838.

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