Patent ID: 8793125
Filing Date: 2014-07-29
Classification: G10L,H04S

Abstract:
1. A device for converting a first number of input audio channels into a second number of output audio channels, where the first number is smaller than the second number, the device comprising: at least one decorrelation unit for producing a set of decorrelated auxiliary channels from an input audio channel, the set of decorrelated auxiliary channels including one or more decorrelated auxiliary channels; and at least one upmix unit for combining channels into output audio channels, wherein the at least one upmix unit is operative to combine an input audio channel or a pre-processed input audio channel and a decorrelated auxiliary channel based on a time-varying inter-channel cross correlation parameter, said device further comprising: wherein the at least one decorrelation unit, the at least one upmix unit or the at least one pre-processing unit is implemented by a computer.