Patent ID: 7760886

Claim:
Apparatus for synthesizing three output channels using two input channels, wherein a second channel of the three output channels is feedable to a speaker in an intended audio rendering scheme, which is positioned between two speakers being feedable with the first output channel and the third output channel, comprising: an analyzer for analyzing the two input channels for detecting signal components occurring in both input channels; and a signal generator for generating the three output channels using the two input channels, wherein the signal generator is operative: to feed detected signal components at least partly into the second channel, and to only feed a part of the detected signal components into the second channel, when a complete feeding of the detected signal components would result in exceeding a maximum threshold for the second channel, wherein the signal generator comprises; a two-three up-mixer for generating three intermediate channels, wherein the second channel includes the detected signal components; a clipping detector for detecting a portion of the second channel having an amplitude above the maximum threshold; and a post processor for removing a portion of the detected signal components from the second channel in a portion detected by the clipping detector and for adding a signal corresponding to the removed portion to the first channel and to the third channel.