Patent ID: 7447317
Filing Date: 2008-11-04
Classification: G10L,H04S

Abstract:
1. Apparatus for processing a multi-channel audio signal, the multi-channel audio signal having at least three original channels, comprising: means for providing a first downmix channel and a second downmix channel, the first and the second downmix channels being derived from the original channels; means for calculating channel side information for a selected original channel of the original signals, the means for calculating being operative to calculate the channel side information such that a downmix channel or a combined downmix channel including the first and the second downmix channel, when weighted using the channel side information, results in an approximation of the selected original channel; the means for calculating channel side information being operative to perform joint stereo coding using a downmix channel as a carrier channel and using, as an input channel, the selected original channel, to generate joint stereo parameters as channel side information for the selected original channel; and means for generating output data, the output data including the channel side information.