Patent ID: 8340303

Claim:
A method of generating a spatial stereo sound, the method comprising: generating a level-adjusted first channel signal and a level-adjusted second channel signal by adjusting respectively a first input channel signal and second input channel signal with a gain value with a level adjustment device; generating stereo signals of the level-adjusted first and second channels from the first input channel signal and the second input channel signal by applying a time difference of times taken for each channel signal to arrive at two ears, and a sound pressure difference formed between the two ears, to each of the first and second input channel signals with a stereo signal generation device; generating a first surround signal of the first channel by subtracting the second input channel signal that is delayed from the first input channel signal, and generating a second surround signal of the second channel by making the surround signal of the first channel out of phase with a surround signal generation device; generating and outputting a plurality of reflected sounds from the generated surround signal of the first or the second channel based on different delays and different gains, and generating one or more reflected signals of the first and second channels for each of the generated reflected sounds by applying the time difference and the sound pressure difference between the two ears to each reflected sound with a reflected sound processing device; and adding the generated stereo, surround, and reflected signals of the first channel to generate and output a first channel signal of the spatial stereo sound with a mixing device, and adding the generated stereo, surround, and reflected signals of the second channel to generate and output a second channel signal of the spatial stereo sound with the mixing device, wherein the generating of the first and second channel signals comprises generating the first and second channel signals by applying a different time delay coefficient having an interaural time difference with respect to different incident angles of each of the reflected sounds.