US 11,942,098 B2
Method and apparatus for adaptive control of decorrelation filters
Tomas Jansson Toftgård, Uppsala (SE); and Tommy Falk, Spånga (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed on Nov. 14, 2022, as Appl. No. 17/986,830.
Application 17/986,830 is a continuation of application No. 17/201,030, filed on Mar. 15, 2021, granted, now 11,501,785.
Application 17/201,030 is a continuation of application No. 16/463,619, granted, now 10,950,247, issued on Mar. 16, 2021, previously published as PCT/EP2017/080219, filed on Nov. 23, 2016.
Claims priority of provisional application 62/430,569, filed on Dec. 6, 2016.
Claims priority of provisional application 62/425,861, filed on Nov. 23, 2016.
Prior Publication US 2023/0071136 A1, Mar. 9, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/008 (2013.01); H04S 3/00 (2006.01)
CPC G10L 19/008 (2013.01) [H04S 3/008 (2013.01); H04S 2400/01 (2013.01); H04S 2420/03 (2013.01); H04S 2420/07 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An audio signal processing method performed by an audio decoder for adaptively adjusting a decorrelator, the method comprising:
obtaining a control parameter;
estimating mean of the control parameter;
estimating variation of the control parameter;
calculating ratio of the variation and mean of the control parameter; and
calculating a targeted decorrelation filter length based on said ratio.