| 摘要 |
PROBLEM TO BE SOLVED: To provide a processing method where common processing is conducted independently of whether an input signal is monaural or stereo, in- head localization of the monaural signal is prevented, a sound field providing a sense of surrounding is created around a listener and quality deterioration is less in the stereo signal. SOLUTION: A phase shift processing section 2 receives the left channel signal SL for the left sound source, and the right channel signal SR for the right sound source and conducts phase shift processing so that a relative phase difference between the left channels signal and the right channel signal becomes between 140 degrees and 160 degrees. In the case of a phase difference of 60 degrees, a problem of localization toward the advanced phase takes place usually similarly to the case of a phase difference of 90 degrees. Furthermore, in the case of a phase difference of 180 degrees (that is, an inverted phase), a sense of localization toward a specific direction is not sensed, but a sense of displeasure to press ears that is specific to the inverted phase takes place. In the case of a phase difference between 140 degrees and 160 degrees, a sense of displeasure due to the inverted phase is not caused and localization in a specific direction is not felt on the contrary. |
