| 摘要 |
PURPOSE: To enable the control of sound image localization of a sound source signal wider than the transfer function in band by providing an adding device for a component subjected to convolutional operation and a delayed and level- adjusted component, or a transfer function compositing section to widen the band of the transfer function. CONSTITUTION: A/D converters 22-1, 22-2 apply A/D conversion to low frequency components W2 +W3 (W3 is a signal component with a low frequency not limited by a transfer function) branched by LPFs 21-1, 21-2 without changing a sampling frequency fm of the transfer function. Then the digital signal is given to convolution computing elements 23-1, 23-2. The digital audio signals comprising digitized audio signals by the computing elements 23-1, 23-2 with transfer functions He(t), Hr (t) are converted into analog signals by D/A converters 24-1, 24-2 and the analog signals and the transfer functions He (t), Hr (t) of delay devices 13-1, 33-1 and 13-2, 33-2 are added by adders 5-1, 5-2, which provide an output of a stereo signal. |
