US 11,990,141 B2
Method and apparatus for controlling multichannel audio frame loss concealment
Erik Norvell, Upplands Väsby (SE); and Chamran Moradi Ashour, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/414,585
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed May 16, 2019, PCT No. PCT/EP2019/062570
§ 371(c)(1), (2) Date Jun. 16, 2021,
PCT Pub. No. WO2020/126120, PCT Pub. Date Jun. 25, 2020.
Claims priority of provisional application 62/782,453, filed on Dec. 20, 2018.
Prior Publication US 2022/0059099 A1, Feb. 24, 2022
Int. Cl. G10L 19/00 (2013.01); G10L 19/005 (2013.01); G10L 19/008 (2013.01)
CPC G10L 19/005 (2013.01) [G10L 19/008 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method of approximating a lost or corrupted multichannel audio frame of a received multichannel audio signal in a decoding device comprising a processor, the method comprising the following operations performed by the processor:
generating a down-mix error concealment frame;
transforming the down-mix error concealment frame into a frequency domain to generate a transformed down-mix error concealment frame;
decorrelating the transformed down-mix error concealment frame to generate a decorrelated concealment frame;
obtaining a residual signal spectrum of a stored residual signal of a previously received multichannel audio signal frame;
generating an energy adjusted decorrelated residual signal concealment frame using the residual signal spectrum;
obtaining a set of multi-channel audio substitution parameters;
providing the transformed down-mix error concealment frame, the energy-adjusted decorrelated residual concealment frame, and multi-channel audio substitution parameters to a parametric multi-channel audio synthesis component to generate a synthesized multichannel audio frame; and
performing an inverse frequency domain transformation of the synthesized multichannel audio frame to generate a substitution frame for the lost or corrupted multichannel audio frame.