US 12,327,568 B2
Support for generation of comfort noise, and generation of comfort noise
Erik Norvell, Upplands Väsby (SE); and Fredrik Jansson, Sundbyberg (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Filed on Nov. 21, 2023, as Appl. No. 18/516,046.
Application 18/516,046 is a continuation of application No. 17/980,386, filed on Nov. 3, 2022, granted, now 11,862,181.
Application 17/980,386 is a continuation of application No. 17/044,740, granted, now 11,495,237, issued on Nov. 8, 2022, previously published as PCT/EP2019/058629, filed on Apr. 5, 2019.
Claims priority of provisional application 62/653,078, filed on Apr. 5, 2018.
Claims priority of provisional application 62/652,941, filed on Apr. 5, 2018.
Claims priority of provisional application 62/652,949, filed on Apr. 5, 2018.
Prior Publication US 2024/0161758 A1, May 16, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G10L 19/012 (2013.01); G10L 19/00 (2013.01); G10L 19/008 (2013.01); G10L 19/032 (2013.01); G10L 19/04 (2013.01); G10L 19/06 (2013.01); H04W 76/28 (2018.01)
CPC G10L 19/012 (2013.01) [G10L 19/0017 (2013.01); G10L 19/008 (2013.01); G10L 19/032 (2013.01); G10L 19/04 (2013.01); G10L 19/06 (2013.01); H04W 76/28 (2018.02)] 26 Claims
OG exemplary drawing
 
1. A method for supporting generation of comfort noise for at least two audio channels at a decoder, the method being performed by an encoder, the method comprises:
selecting a weight factor α based on an available bit-budget Bm for encoding a spatial coherence value (C);
calculating a combined prediction (Cpc) using: a first coherence prediction (Cp1), a second coherence prediction (Cp2), and α, wherein Cpc is equal to α(Cp1)+(1−α) (Cp2);
obtaining a residual coherence value (Cr) using the combined prediction (Cpc) and the spatial coherence value (C), where Cr is equal to C−Cpc;
signaling information about the residual coherence value (Cr) to the decoder; and
signaling information about the weight factor α to the decoder, for enabling the generation of the comfort noise for the at least two audio channels at the decoder.