Patent ID: 7254242
Filing Date: 2007-08-07
Classification: G10L

Abstract:
1. An acoustic signal processing apparatus comprising: an audio source for generating an audio signal; an audio correction filter for receiving the audio signal and correcting the audio signal to contain a component for canceling an external noise component in a sound playback system; a speaker for receiving the corrected audio signal and providing an acoustic signal to the sound playback system; a first band analyzer for dividing an acoustic signal received from the sound playback system through an input unit into a plurality of frequency bands and for generating a first band level for each band; an acoustic signal estimator for estimating the band level at the input unit of the acoustic signal provided by the speaker and for generating a second band level for each band; and a processor for extracting the external noise component, which is contained in the acoustic signal received from the sound playback system through the input unit, using the first band level and the second band level; wherein the audio correction filter multiplies the audio signal by an audio correction coefficient generated according to the external noise component extracted by the processor.