US 12,148,435 B2
Decoding of audio scenes
Heiko Purnhagen, Sundbyberg (SE); Lars Villemoes, Järfälla (DK); Leif Jonas Samuelsson, Sundbyberg (SE); and Toni Hirvonen, Jarfalla (FI)
Assigned to Dolby International AB, Dublin (IE)
Filed by Dolby International AB, Dublin (IE)
Filed on May 15, 2023, as Appl. No. 18/317,598.
Application 16/938,527 is a division of application No. 16/580,898, filed on Sep. 24, 2019, granted, now 10,726,853, issued on Jul. 28, 2020.
Application 18/317,598 is a continuation of application No. 17/724,325, filed on Apr. 19, 2022, granted, now 11,682,403.
Application 17/724,325 is a continuation of application No. 16/938,527, filed on Jul. 24, 2020, granted, now 11,315,577, issued on Apr. 26, 2022.
Application 16/580,898 is a continuation of application No. 16/367,570, filed on Mar. 28, 2019, granted, now 10,468,039, issued on Nov. 5, 2019.
Application 16/367,570 is a continuation of application No. 16/015,103, filed on Jun. 21, 2018, granted, now 10,347,261, issued on Jul. 9, 2019.
Application 16/015,103 is a continuation of application No. 14/893,852, granted, now 10,026,408, issued on Jul. 17, 2018, previously published as PCT/EP2014/060727, filed on May 23, 2014.
Claims priority of provisional application 61/827,246, filed on May 24, 2013.
Prior Publication US 2023/0290363 A1, Sep. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); G10L 19/20 (2013.01); H04S 3/02 (2006.01); H04S 5/00 (2006.01)
CPC G10L 19/008 (2013.01) [G10L 19/20 (2013.01); H04S 3/02 (2013.01); H04S 5/00 (2013.01); H04S 2400/03 (2013.01); H04S 2400/11 (2013.01); H04S 2420/03 (2013.01); H04S 2420/07 (2013.01)] 7 Claims
OG exemplary drawing
 
7. An apparatus for decoding an audio scene represented by N audio signals, the apparatus comprising:
a receiver for receiving a bit stream comprising L auxiliary signals, M downmix signals and matrix elements of a reconstruction matrix, wherein the matrix elements are transmitted as side information in the bit stream;
a first processor for generating the reconstruction matrix using the matrix elements; and
a second processor for reconstructing the N audio signals from the M downmix signals and the L auxiliary signals using the reconstruction matrix, wherein approximations of the N audio signals are obtained as linear combinations of the M downmix signals with the matrix elements of the reconstruction matrix as coefficients in the linear combinations, wherein M is less than N, and M is equal or greater than one, and wherein the linear combinations are formed by multiplying a vector comprising the M downmix signals with the reconstruction matrix.