Speech recognition system and method utilizing adaptive...

Details Speech recognition system and method utilizing adaptive... Speech recognition system and method utilizing adaptive...

2004-04-30

2009-06-23

Edouard, Patrick N (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Recognition

C704S231000, C381S071100, C381S094100, C381S073100, C381S108000, C381S093000, C379S406010, C379S406080, C379S406050, C379S388070, C379S388030, C455S570000, C455S501000

Reexamination Certificate

active

07552050

ABSTRACT:
A voice recognition system includes an adaptive filter and a subtractor. The adaptive filter generates a simulated talk-back voice y(n) by setting a filter coefficient simulating a transfer system in which an input voice corresponding to a voice command and a talk-back voice output from a speaker are input into a microphone and by filtering a talk-back voice x(n). The subtractor extracts the input voice by subtracting the simulated talk-back voice y(n) from mixed sound input into the microphone. With this configuration, the talk-back voice is attenuated from the mixed sound including the input voice and the talk-back voice input tedinto the microphone, and then, the mixed sound is supplied to a voice recognition engine. Accordingly, the user can input his/her voice during a talk-back operation without the need to interrupt it by pressing a speech button every time the user wishes to input the voice. The voice recognition operation time can be thus reduced.

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European Search Report; Oct. 26, 2004; L. Krembel, Examiner; 2 pages; Munich, Germany.

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