US 12,243,541 B2
Apparatus and method for encoding or decoding a multichannel signal using a side gain and a residual gain
Jan Buethe, Erlangen (DE); Guillaume Fuchs, Bubenreuth (DE); Wolfgang Jaegers, Erlangen (DE); Franz Reutelhuber, Erlangen (DE); Juergen Herre, Erlangen (DE); Eleni Fotopoulou, Nuremberg (DE); Markus Multrus, Nuremberg (DE); and Srikanth Korse, Nuremberg (DE)
Assigned to FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
Filed by FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V., Munich (DE)
Filed on Aug. 10, 2022, as Appl. No. 17/884,910.
Application 17/884,910 is a division of application No. 16/405,422, filed on May 7, 2019, granted, now 11,450,328.
Application 16/405,422 is a continuation of application No. PCT/EP2017/077822, filed on Oct. 30, 2017.
Claims priority of application No. 16197816 (EP), filed on Nov. 8, 2016.
Prior Publication US 2022/0392464 A1, Dec. 8, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); H04S 1/00 (2006.01); H04S 3/00 (2006.01); H04S 7/00 (2006.01)
CPC G10L 19/008 (2013.01) [H04S 1/007 (2013.01); H04S 3/008 (2013.01); H04S 7/30 (2013.01); H04S 2400/01 (2013.01); H04S 2420/03 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An apparatus for decoding an encoded multi-channel audio signal comprising a single-channel downmix audio signal, a side gain and a residual gain, the apparatus comprising:
an input interface configured for receiving the encoded multi-channel audio signal and for acquiring the single-channel downmix audio signal, the side gain and the residual gain from the encoded multi-channel audio signal;
a residual signal synthesizer configured for synthesizing a single-channel residual signal using the residual gain, wherein the residual signal synthesizer comprises a weighter configured for weighting a raw residual signal by the residual gain to obtain the single-channel residual signal; and
an upmixer configured for upmixing the single-channel downmix audio signal using the side gain and the single-channel residual signal to acquire a reconstructed first audio channel and a reconstructed second audio channel.