Patent ID: 9462404
Filing Date: 2016-10-04
CPC Classification: G10L,H04S

Claim Text:
1. Apparatus for inverse processing of input data of a multichannel audio signal, the apparatus comprising: an input data reader for reading the input data, the input data comprising channel side information, a first downmix channel or a signal derived from the first downmix channel and a second downmix channel or a signal derived from the second downmix channel, wherein the channel side information are calculated such that a downmix channel or a combined downmix channel comprising the first downmix channel and the second downmix channel, when weighted using the channel side information, results in an approximation of a selected original channel, wherein the input data reader is configured to obtain the first downmix channel or a signal derived from the first downmix channel and the second downmix channel or a signal derived from the second downmix channel and the channel side information; and a channel reconstructor for reconstructing the approximation of the selected original channel using the channel side information and the downmix channel or the combined downmix channel to obtain the approximation of the selected original channel, wherein at least one of the input data reader and the channel reconstructor comprises a hardware implementation; wherein the approximation comprises an approximated left channel, an approximated left surround channel, an approximated right channel, and an approximated right surround channel, wherein the first downmix channel and the second downmix channel are a left downmix channel and a right downmix channel, respectively, wherein the left downmix channel and the right downmix channel are a stereo representation of the multi-channel audio signal and wherein the input data include channel side information for at least three of the approximated left channel, the approximated left surround channel, the approximated right channel, and the approximated right surround channel, wherein the channel reconstructor is operative