Patent ID: 6909787

Claim:
A method for stereo vocal cancellation, the method outputting a first output signal and a second output signal according to a first stereo signal of a first stereo channel and a second stereo signal of a second stereo channel respectively; the method comprising: generating a mono signal according to a sum of the first stereo signal and the second stereo signal; high pass filtering the first stereo signal to generate a corresponding first high pass signal according to a high-frequency band, the frequency of the first high pass signal being substantially concentrated on the high-frequency band; high pass filtering the second stereo signal to generate a corresponding second high pass signal according to the high-frequency band, the frequency of the second high pass signal being substantially concentrated on the high-frequency band; generating a first intermediate signal according to a difference between the first stereo signal and the mono signal; generating a second intermediate signal according to a difference between the second stereo signal and the mono signal; mixing the first intermediate signal and the first high pass signal to generate the first output signal; and mixing the second intermediate signal and the second high pass signal to generate the second output signal; wherein the first output signal and the second output signal have substantial differences outside the high-frequency band.