Patent ID: 8170870
Filing Date: 2012-05-01
Classification: G10H,G10L

Abstract:
1. An audio signal processing apparatus comprising: a generation section that generates an audio signal representing a voice, the generation section comprising a pitch conversion section and a synthesis section, the pitch conversion section specifying a pitch which is approximately one-half of a target pitch of a selected audio signal representing an articulate voice to the synthesis section, the synthesis section synthesizing a signal obtained by linking voice segments according to vocal sound data representing the voice, and outputting the audio signal by adjusting a pitch of the synthesized signal to the specified pitch; a distribution section that distributes the audio signal generated by the generation section to a first channel and a second channel, respectively; a delay section that delays the audio signal of the first channel relative to the audio signal of the second channel for creating a phase difference between the audio signal of the first channel and the audio signal of the second channel such that the created phase difference has a duration corresponding to either an added value of a first duration which is approximately one half of a period of the audio signal generated by the generation section and a second duration which is set shorter than the first duration and which is a fixed value, or a difference value of the first duration and the second duration; an addition section that adds the audio signal of the first channel and the audio signal of the second channel with one another, between which the phase difference is created by the delay section, and that outputs the added audio signal having the target pitch; and a delay amount calculation section that sets the first duration of the delay section such that the first duration corresponds to a period defining the target pitch of the added audio signal to be outputted, wherein the output audio signal having the target pitch simulates a rough or harsh voice.