Patent ID: 8831762
Filing Date: 2014-09-09
Classification: G10H,G10L

Abstract:
1. A music audio signal generating system comprising: a processor; and a memory; the memory embodying instructions that when executed by the processor cause the processor to function as: a signal extracting and storing section configured to extract a separated audio signal including only an audio signal of musical instrument sounds generated by a musical instrument of a first kind from a music audio signal including the audio signal of the musical instrument sounds generated by the musical instrument of the first kind and store the separated audio signal for each tone of the musical instrument sounds, and also store a residual audio signal; a separated audio signal analyzing and storing section configured to analyze a plurality of parameters for each tone including at least harmonic peak parameters indicating relative amplitudes of n-th order harmonic components and power envelope parameters indicating temporal power envelopes of the n-th order harmonic components and then store the plurality of parameters in order to represent the separated audio signal for each tone using a harmonic model that is formulated by the plurality of parameters; a replacement parameter storing section configured to store harmonic peak parameters indicating relative amplitudes of n-th order harmonic components of a plurality of tones generated by a musical instrument of a second kind, the harmonic peak parameters being created from an audio signal of musical instrument sounds generated by the musical instrument of the second kind that is different from the musical instrument of the first kind, and required to represent, using the harmonic model, audio signals of the plurality of tones generated by the musical instrument of the second kind and corresponding to all of the tones included in the separated audio signal; a replaced parameter creating and storing section configured to create replaced harmonic peak parameters by replacing a plurality of harmonic peaks included in the harmonic peak parameters, which are stored in the separated audio signal analyzing and storing section and indicate the relative amplitudes of the n-th order harmonic components of each tone generated by the musical instrument of the first kind, with harmonic peaks included in the harmonic peak parameters, which are stored in the replacement parameter storing section and indicate the relative amplitudes of the n-th order harmonic components of each tone generated by the musical instrument of the second kind and corresponding to each tone generated by the musical instrument of the first kind, and then store the replaced harmonic peak parameters thus created; a synthesized separated audio signal generating section configured to generate a synthesized separated audio signal for each tone using parameters other than the harmonic peak parameters, which are stored in the separated audio signal analyzing and storing section, and the replaced harmonic peak parameters stored in the replaced parameter creating and storing section; and a signal adding section configured to add the synthesized separated audio signal and the residual audio signal to output a music audio signal including the audio signal of music instrument sounds generated by the musical instrument of the second kind.