Patent ID: 8873761

Claim:
An audio signal processing device generating and outputting 2-channel audio signals acoustically reproduced by two electro-acoustic transducer means arranged at positions close to both ears of a listener from audio signals of plural channels of two or more channels, comprising: head related transfer function convolution processing units to convolute head related transfer functions with the audio signals of respective channels of the plural channels, which allow the listener to listen to sound such that sound images are localized at assumed virtual sound image localization positions concerning respective channels of the plural channels of the two or more channels when sound is acoustically reproduced by the two electro-acoustic transducer means; and 2-channel signal generation means for generating 2-channel audio signals to be supplied to the two electro-acoustic transducer means from audio signals of plural channels from the head related transfer function convolution processing units, wherein, in the head related transfer function convolution processing units, at least a head related transfer function concerning direct waves from the assumed virtual image localization positions concerning a left channel and a right channel in the plural channels to both ears of the listener is not convoluted, wherein a means for not convoluting the head related transfer function concerning direct waves from the assumed virtual sound image localization positions concerning the right and left channels to both ears of the listener is provided at a subsequent stage of the 2-channel signal generation means by convoluting an inverse function of the head related transfer function concerning direct waves from the assumed virtual sound image localization positions concerning the right and left channels to both ears of the listener.