Patent ID: 8129606
Filing Date: 2012-03-06
Classification: H04S

Abstract:
1. A musical tone signal processing apparatus, the apparatus comprising: input means for inputting a musical tone signal, the musical tone signal comprising a signal for each of a plurality of input channels; dividing means for dividing the signals into a plurality of frequency bands; level calculation means for calculating a level for each of the input channels for each of the frequency bands; localization information calculation means for calculating localization information, which indicates an output direction of the musical tone signal with respect to a first reference localization that has been set in advance, for each of the frequency bands based on the level; first setting means for setting at least one direction range of the output direction; judgment means for judging whether the output direction of the musical tone signal is within the direction range; extraction means for extracting an extraction signal, the extraction signal comprising the signal of each of the input channels in the frequency band corresponding to the localization information having the output direction that is judged to be within the direction range; output signal generation means for generating an output signal in the time domain for each output channel that has been set in advance, the output signal in the time domain generated by signal processing and converting the extraction signal; output means for outputting the output signal in the time domain to each of the output channels; second setting means for setting for the direction range: a second reference localization, a first function that stipulates the degree of expansion of a boundary of a first end of the direction range, and a second function that stipulates the degree of expansion of a boundary of a second end of the direction range; and acoustic image scaling means for expanding or contracting an acoustic image by shifting the output direction of an extraction signal, that has localization information located closer to the boundary of the first end of the direction range than the second reference localization, based on mapping of the first function, and shifting the output direction of an extraction signal, that has localization information located closer to the boundary of the second end of the direction range than the second reference localization, based on mapping of the second function.