Speech recognition apparatus and speech recognition method

Details Speech recognition apparatus and speech recognition method Speech recognition apparatus and speech recognition method

2007-12-18

2007-12-18

Lerner, Martin (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S255000

Reexamination Certificate

active

11296268

ABSTRACT:
The present invention provides a speech recognition apparatus which appropriately performs speech recognition by generating, in real time, language models adapted to a new topic even in the case where topics are changed. The speech recognition apparatus includes: a word specification unit for obtaining and specifying a word; a language model information storage unit for storing language models for recognizing speech and corresponding pieces of tag information for each language model; a combination coefficient calculation unit for calculating the weights of the respective language models, as combination coefficients, according to the word obtained by the word specification unit, based on a relevance degree between the word obtained by the word specification unit and the tag information of each language model; a language probability calculation unit for calculating the probabilities of word appearance by combining the respective language models according to the calculated combination coefficients; and a speech recognition unit for recognizing speech by using the calculated probabilities of word appearance.

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Akio Kobayashi et al., “A Dynamic Adaptation of Language Model for Broadcast News Transcription” (NHK Sci. & Tech. Research Labs.), The Acoustical Society of Japan (ASJ) 2000 Nen Shunki Kenkyu Happyokai Koen Ronbunshu-1-, Mar. 15, 2000, pp. 69-70, with English translation.

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