Patent ID: 8296143
Filing Date: 2012-10-23
Classification: G10L

Abstract:
1. An audio signal processing apparatus comprising: a central processing unit, wherein the central processing unit includes: a frequency band dividing unit that divides an input audio signal into a plurality of bands; a plurality of time stretch/pitch shift processing units that perform at least one of time stretching and pitch shifting respectively by carrying out sine or cosine oscillation of each frequency component on the basis of a result of frequency analysis of a band-divided audio signal obtained as a result of division into the plurality of bands and a required time stretch/pitch shift amount, and performing a synthesis process; and a plurality of phase synchronization processing units that perform phase synchronization process for adjusting phases of time stretch/pitch shift signals outputted by the plurality of time stretch/pitch shift processing units, respectively, the audio signal processing apparatus thereby synthesizing outputs of the plurality of phase synchronization processing units and outputting a result, wherein each of the phase synchronization processing units includes