AUDIO SIGNAL PROCESSING METHOD AND APPARATUS

摘要

PROBLEM TO BE SOLVED: To reduce the processing demand amount of the whole convolution system while substantially maintaining total quality of a convolution process.

SOLUTION: Disclosed is a method of generating a reduced audio output signal set by processing a series of input audio signals representing a series of virtual audio sound sources placed at prescribed positions nearby a lister and reproducing it on speaker systems nearby the listener. The method comprises: convoluting the input audio signals into start parts of corresponding impulse responses; mapping initial sounds and early reflections for impulse responses of the corresponding virtual audio sources to the corresponding speaker units to generate a series of initial responses; generating a combinatorial synthesis from an audio output signal; generating combined convolution ends from ends of the corresponding impulse responses; convoluting the combinatorial synthesis with the combinatorial convolution ends to generate a combinatorial end response; and combining a series of corresponding initial responses with corresponding combinatorial end responses for the audio output signals to generate the audio output signal.

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