13. A method for recognizing a voice for an audio-visual (AV) system generating an audio, the method comprising: receiving an input signal including a reflected AV system audio, a user's voice, and a noise; dividing an original; AV system audio signal into a first plurality of signals having different frequency ranges by a first filter bank; dividing the input sound into a second plurality of signals having the different frequency ranges by a second filter bank; removing the reflected AV system audio signal from the second plurality of signals using the first plurality of signals by a plurality of adaptive filters; combining the signals outputted from the plurality of adaptive filters by a third filter bank; detecting the user's voice from the first signal and obtaining the user's voice information based on the detected user's voice; comparing the detected user's voice with voice patterns that belong to at least one model; wherein the removing the reflected AV system audio signal comprises determining whether or not to adapt the plurality of adaptive filters according to a beginning and an end of the user's voice detected; and wherein when the starting point of the user's voice is determined, the adaptive filter unit stops adapting, but it restarts adapting when the ending point of the user's voice is determined.
13. A method for recognizing a voice for an audio-visual (AV) system generating an audio, the method comprising: receiving an input signal including a reflected AV system audio, a user's voice, and a noise; dividing an original; AV system audio signal into a first plurality of signals having different frequency ranges by a first filter bank; dividing the input sound into a second plurality of signals having the different frequency ranges by a second filter bank; removing the reflected AV system audio signal from the second plurality of signals using the first plurality of signals by a plurality of adaptive filters; combining the signals outputted from the plurality of adaptive filters by a third filter bank; detecting the user's voice from the first signal and obtaining the user's voice information based on the detected user's voice; comparing the detected user's voice with voice patterns that belong to at least one model; wherein the removing the reflected AV system audio signal comprises determining whether or not to adapt the plurality of adaptive filters according to a beginning and an end of the user's voice detected; and wherein when the starting point of the user's voice is determined, the adaptive filter unit stops adapting, but it restarts adapting when the ending point of the user's voice is determined. 16. The method of claim 13 , further comprises removing the noise and an unremoved portion of the reflected AV system audio signal from the signal passed through a plurality of filters.