Method and apparatus for generating a stereo signal with enhanced perceptual quality

Method 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:

• generating 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;
• generating 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
• upmixing the representation of the mid-signal and the enhanced side-signal to derive the stereo signal with enhanced perceptual quality.

A computer readable medium storing a computer program having a program code for performing, when running on a computer, a method 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:

• generating 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;
• generating 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 a portion of the mid-signal and the decorrelated representation of the portion of the side-signal;
• and
• upmixing the representation of the mid-signal and the enhanced side-signal to derive the stereo signal with enhanced perceptual quality.