Patent ID: 7243073
Filing Date: 2007-07-10
Classification: H04S

Abstract:
1. A method for realizing virtual multi-channel by spectrum analysis capable of converting two-channel sound source into six-channel output, said method comprising steps of: generating low-frequency-effect sound data for averaging sound data of left and right channels in said two-channel sound source and filtering said average by a first low pass filter to obtain low-frequency-effect data, wherein said sound data having a frequency higher than a first cut-off frequency is filtered by said first low pass filter; generating central channel sound data for averaging sound data of said left and said right channels in said two-channel sound source and filtering said average by a second low pass filter to obtain central channel sound data, wherein said sound data having a frequency higher than a second cut-off frequency is filtered by said second low pass filter; generating surround right and left sound data for copying sound data of said left and said right channels in said two-channel sound source as said surround right and left sound data, respectively; and assembling six-channel sound data for assembling said low-frequency-effect sound data, said central channel sound data, said surround left sound data, said surround right sound data, said left channel sound data, and said right channel sound data.