US 12,293,766 B2
Time reversed audio subframe error concealment
Erik Norvell, Upplands Väsby (SE); and Chamran Moradi Ashour, Stockholm (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Mar. 18, 2024, as Appl. No. 18/608,303.
Application 18/608,303 is a continuation of application No. 17/618,676, granted, now 11,967,327, previously published as PCT/EP2020/064394, filed on May 25, 2020.
Claims priority of provisional application 62/860,922, filed on Jun. 13, 2019.
Prior Publication US 2024/0221760 A1, Jul. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/005 (2013.01); G10L 19/022 (2013.01); G10L 19/06 (2013.01)
CPC G10L 19/005 (2013.01) [G10L 19/022 (2013.01); G10L 19/06 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A method of generating a concealment audio subframe of an audio signal in a decoding device, the method comprising:
generating frequency spectra on a subframe basis where a first subframe window of consecutive subframes is a mirrored version or a time reversed version of a second subframe window of the consecutive subframes;
detecting peaks of a signal spectrum of a previously received audio signal on a fractional frequency scale;
estimating a phase of each of the peaks;
deriving a phase adjustment for a time reversed concealment audio subframe based on the estimated phase;
applying the phase adjustment to the peaks of the signal spectrum to form phase adjusted peaks and to form a concealment audio subframe based on the phase adjusted peaks, wherein applying the phase adjustment includes applying a time reversal to the concealment audio subframe; and
generating a synthesized concealment audio subframe based on the concealment audio subframe.