US 12,087,310 B2
Apparatus and method for providing enhanced guided downmix capabilities for 3D audio
Arne Borsum, Erlangen (DE); Stephan Schreiner, Birgland (DE); Harald Fuchs, Roettenbach (DE); Michael Kratz, Erlangen (DE); Bernhard Grill, Lauf (DE); and Sebastian Scharrer, Hersbruck (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 Jan. 14, 2021, as Appl. No. 17/148,638.
Application 17/148,638 is a continuation of application No. 16/429,280, filed on Jun. 3, 2019, granted, now 10,950,246.
Application 16/429,280 is a continuation of application No. 15/595,065, filed on May 15, 2017, granted, now 10,347,259, issued on Jul. 9, 2019.
Application 15/595,065 is a continuation of application No. 14/643,007, filed on Mar. 10, 2015, granted, now 9,653,084, issued on May 16, 2017.
Application 14/643,007 is a continuation of application No. PCT/EP2013/068903, filed on Sep. 12, 2013.
Claims priority of provisional application 61/699,990, filed on Sep. 12, 2012.
Prior Publication US 2021/0134304 A1, May 6, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); G10L 19/02 (2013.01); G10L 19/16 (2013.01); H04S 3/00 (2006.01); H04S 3/02 (2006.01); H04S 5/00 (2006.01)
CPC G10L 19/008 (2013.01) [G10L 19/02 (2013.01); G10L 19/173 (2013.01); H04S 3/002 (2013.01); H04S 3/02 (2013.01); H04S 5/005 (2013.01); H04S 2400/03 (2013.01); H04S 2400/11 (2013.01); H04S 2420/03 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An apparatus for generating two or more audio output channels from three or more audio input channels, wherein the apparatus comprises:
a receiving interface for receiving the three or more audio input channels, and
a downmixer for downmixing the three or more audio input channels using a weight for each audio input channel to obtain the two or more audio output channels,
wherein the number of the audio output channels is smaller than the number of the audio input channels,
wherein the downmixer is configured to determine the weight for each audio input channel,
wherein the apparatus is configured to feed each of the two or more audio output channels into a loudspeaker of a group of two or more loudspeakers,
wherein the downmixer is configured to downmix the three or more audio input channels depending on each assumed loudspeaker position of a first group of three or more assumed loudspeaker positions and depending on each actual loudspeaker position of a second group of two or more actual loudspeaker positions to obtain the two or more audio output channels,
wherein the downmixer is configured to generate an audio output channel of the two or more audio output channels depending on at least two audio input channels of the three or more audio input channels, depending on an assumed loudspeaker position of each of said at least two audio input channels and depending on an actual loudspeaker position of said audio output channel, and
wherein the downmixer is configured to downmix the three or more audio input channels depending on an amount of ambience of each of the three or more audio input channels to obtain the two or more audio output channels.