Patent ID: 7552050

Claim:
A voice recognition system, comprising: a microphone configured for receiving a mixed voice input; a plurality of speakers, wherein at least one speaker is configured for generating a talk-back voice, and at least one speaker is not configured for generating a talk-back voice; at least one adaptive filter unit in communication with at least one speaker in the plurality of speakers that is not configured for generating a talk-back voice, and configured for generating a simulated mixed voice to be received by the microphone by setting a first filter coefficient; a variable filter unit in communication with the at least one speaker in the plurality of speakers that is configured for generating a talk-back voice, wherein the variable filter unit is configured for copying only the filter coefficient set by the at least one adaptive filter unit in communication with the speaker located closest in proximity to the microphone in the plurality of speakers that is not configured to generate a talk-back voice; and an input-voice extracting unit configured for extracting an input voice by subtracting the simulated mixed voice from the mixed voice input received by the microphone; and a gain controller connected with the adaptive filter unit and the input-voice extracting unit, and configured for receiving the mixed voice input received by the microphone and the output from the at least one adaptive filter unit, and to increase the volume of the talk-back voice to be provided to the at least one speaker in the plurality of speakers based on the mixed voice input and the output of the adaptive filter unit, wherein the volume is increased to compensate for the surrounding noise and the talk-back voice of the mixed voice input received by the microphone such that the talk-back voice can be articulated to the user; wherein the at least one adaptive filter unit is configured for filtering the talk-back voice prior to output by the speaker.