Patent ID: 8073688
Filing Date: 2011-12-06
Classification: G10L

Abstract:
1. A voice processing apparatus comprising: a frequency analysis section that identifies a first frequency spectrum of an input voice comprising complex frequency components and having a plurality of local intensity peaks, wherein said frequency analysis section generates, for each first spectral distribution region that contains a frequency presenting one of said local intensity peaks in the first frequency spectrum of the input voice, input spectrum data indicative of a frequency spectrum belonging to the first spectral distribution region; an envelope identification section that generates input envelope data indicative of a spectral envelope of the first frequency spectrum identified by said frequency analysis section; an acquisition section that acquires converting spectrum data indicative of a second frequency spectrum of a converting voice comprising complex frequency components and having a plurality of local intensity peaks, wherein said acquisition section acquires, for each second spectral distribution region that contains a frequency presenting one of said local intensity peaks in the second frequency spectrum of the converting voice, converting spectrum data indicative of a frequency spectrum belonging to the second spectral distribution region; a data generation section that, on the basis of the input envelope data generated by said envelope identification section and the converting spectrum data generated by said acquisition section, generates new spectrum data indicative of a frequency spectrum corresponding in shape to the second frequency spectrum of the converting voice and having a substantially same spectral envelope as the spectral envelope of the input voice; and a signal generation section that generates a voice signal on the basis of the new spectrum data generated by said data generation section, wherein said data generation section includes: a spectrum conversion section that associates the first spectral distribution regions and the second spectral distribution regions in order of frequencies, repositions, independently for each of the second spectral distribution regions, the frequency spectrum of the converting spectrum data of each of the second spectral distribution regions on the frequency axis in such a manner that the frequency of the local intensity peak belonging to the second spectral distribution region substantially matches the frequency of the local intensity peak belonging to the first spectral distribution region associated with the second spectral distribution region, and generates converted spectrum data on the basis of the repositioned frequency spectrum of the converting spectrum data; and an envelope adjustment section that adjusts intensity of a frequency spectrum of the converted spectrum data on the basis of the input envelope data to generate the new spectrum data, and wherein said spectrum conversion section further adds together, for each of the first spectral distribution regions of the input voice and at a particular ratio, intensity indicated by the input spectrum data of the first spectral distribution region and intensity indicated by the repositioned frequency spectrum of the converting spectrum data of the second spectral distribution region associated with the first spectral distribution region, to thereby generate the converted spectrum data indicative of a frequency spectrum having as intensity thereof a sum of the intensity.