Patent ID: 8064624

Claim:
Audio processor for generating a stereo signal with enhanced perceptual quality using a mid-signal and a side-signal, the mid-signal representing a sum of original left and right channels and the side-signal representing a difference of the original left and right channels, comprising: a decorrelator adapted to generate a decorrelated representation of at least a portion of the mid-signal and/or a decorrelated representation of at least a portion of the side-signal; a signal combiner adapted to generate an enhanced side-signal combining a representation of the side-signal with the decorrelated representation of the portion of the mid-signal, with the decorrelated representation of the side-signal and the decorrelated representation of the portion of the mid-signal or with the portion of the mid-signal and the decorrelated representation of the portion of the side-signal; and a mid-side upmixer adapted to generate the stereo signal with enhanced perceptual quality using a representation of the mid-signal and the enhanced side-signal.