Patent ID: 6198826
Filing Date: 2001-03-06
Classification: H04R,H04S

Abstract:
A system for synthesizing multiple output channels from a stereo input signal, the system comprising:first circuit for synthesizing a first pair of output signals having monaural information from the stereo input signal, wherein said first circuit comprises:a first summer for combining the one channel of the stereo signal with an inverse of the other channel of the stereo signal to form a difference signal;a first filter for adjusting amplitude and phase of the difference signal on a frequency dependent basis to form a first filtered signal;a second summer for combining the first filtered signal with the one channel to form one signal of the first pair of output signals; anda third summer for combining an inverse signal of the first filtered signal with the other channel to form the other signal of the first pair of output signals; andsecond circuit for synthesizing a second pair of output signals having monaural information substantially removed from the stereo input signal.