To improve the accuracy of the voice recognition system for an AV system, the present invention includes a reflected sound remover having a plurality of filters, the reflected sound remover being configured to receive an input sound signal including a reflected AV system audio, a user's voice, and a noise, and being configured to remove the reflected audio from the input sound according to user's voice information; a voice detector detecting the user's voice from a signal outputted from the reflected sound remover and obtaining the user's voice information based on the detected user's voice; and a voice recognition unit comparing the detected user's voice with voice patterns that belong to at least one model.