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1. (WO2018086948) APPARATUS AND METHOD FOR DOWNMIXING OR UPMIXING A MULTICHANNEL SIGNAL USING PHASE COMPENSATION

Pub. No.:    WO/2018/086948    International Application No.:    PCT/EP2017/077824
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Tue Oct 31 00:59:59 CET 2017
IPC: G10L 19/008
H04S 3/00
Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Inventors: BUETHE, Jan
FUCHS, Guillaume
JAEGERS, Wolfgang
REUTELHUBER, Franz
HERRE, Juergen
FOTOPOULOU, Eleni
MULTRUS, Markus
KORSE, Srikanth
Title: APPARATUS AND METHOD FOR DOWNMIXING OR UPMIXING A MULTICHANNEL SIGNAL USING PHASE COMPENSATION
Abstract:
An apparatus for downmixing a multi-channel signal (100) comprising at least two channels (101, 102), comprises: a downmixer (120) for calculating (34) a downmix signal (122) from the multi-channel signal (100), wherein the downmixer is configured to calculate (34) the downmix using an absolute phase compensation, so that a channel having a lower energy among the at least two channels is only rotated or is rotated stronger than a channel having a greater energy in calculating the downmix signal (122); and an output interface (160) for generating an output signal, the output signal comprising information on the downmix signal (122).