Patent ID: 6606388
Filing Date: 2003-08-12
Classification: G10H,H03G,H04S

Abstract:
A method for enhancing the quality of an audio signal, the method comprising:separating said audio signal into a first signal having low frequency components of said audio signal and a second signal having high frequency components of said audio signal; processing said first signal, while delaying said second signal by a first amount of time taken for said processing of said first signal to finish, to enhance first characteristics of said first signal such that said first signal after processing can still be aligned temporally with the said second signal; and processing delayed said second signal while delaying processed said first signal by a second amount of time taken for said processing of delayed said second signal to finish, to enhance second characteristics of delayed said second signal such that delayed said second signal after processing can be aligned temporally with processed said first signal; or processing said delayed second signal, while delaying said first signal by a second amount of time taken for said processing of said second signal to finish, to enhance second characteristics of said second signal such that said second signal after processing can still be aligned temporally with the said first signal; and processing delayed said first signal while delaying processed said second signal by a first amount of time taken for said processing of delayed said first signal to finish, to enhance first characteristics of delayed said first signal such that delayed said first signal after processing can be aligned temporally with processed said second signal; combining processed and delayed said delayed first signal and processed and delayed said second signal to form a processed audio signal; and generating a left-channel audio signal and a right-channel audio signal from said processed audio signal, wherein said left-channel audio signal is generated by adding a delayed and filtered version of said processed audio signal to said processed audio signal, said right-channel audio signal is generated by subtracting a delayed and filtered version of said processed audio signal from said processed audio signal.