Patent ID: 9159335
Filing Date: 2015-10-13
Classification: G10L

Abstract:
1. A noise estimation apparatus comprising: an audio input unit configured to receive audio signals, with two microphones, from a plurality of directions and transform the received audio signals into frequency-domain representations of the received audio signals; a target sound blocker configured to block, within the frequency-domain representations, audio signals coming from a direction of a target sound source and thereby produce target-blocked audio signals; and a compensator configured to compensate for distortions, within the target-blocked audio signals, resulting from directivity gains produced by the target sound blocker, wherein: the target sound blocker blocks the audio signals coming from the direction of the target sound source and receives the other audio signals coming from the other directions different from the direction of the target sound source by calculating a difference between a first audio signal received by a first of the two microphones and a second audio signal received by a second of the two microphones, and the compensator calculates weights of the target-blocked audio signals, based on an average value of the target-blocked audio signals, and multiplies the target-blocked audio signals by the corresponding weights.