Patent ID: 8890290

Claim:
A method of decorrelating a signal using phase diffusion at high frequencies, the method comprising: separating a left input signal into a left high-frequency signal and a left low-frequency signal and separating a right input signal into a right high-frequency signal and a right low-frequency signal; creating a diffused left high-frequency signal from the left high-frequency signal using a first diffuser; creating a diffused right high-frequency signal from the right high-frequency signal using a second diffuser; creating a delayed left low-frequency signal and a delayed right low-frequency signal wherein a delay of the delayed left low-frequency signal and a delay of the delayed right low-frequency signal are related to a delay of the first diffuser and a delay of the second diffuser; and combining the delayed left low-frequency signal with the diffused left high-frequency signal and combining the delayed right low-frequency signal with the diffused right high-frequency signal, thereby producing a stereo signal with phase diffusion at high frequencies.