Patent ID: 11862181
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 2:
3. A receiving node for generation of comfort noise for at least two audio channels at the receiving node, the receiving node comprising processing circuitry, the processing circuitry being configured to cause the receiving node to:
receive information about a weight factor α from the transmitting node;
determine a spatial coherence between a first audio signal for a first audio channel and a second audio signal for a second audio channel, wherein at least one predicted spatial coherence value Ĉpred,b,m(q) per frame m and frequency band b is determined to form a vector of predicted spatial coherence values, wherein the vector of predicted spatial coherence values is formed by a weighted combination of a first coherence prediction Ĉ1,b,m(q) and a second coherence prediction Ĉ2,b,m, wherein the first coherence prediction Ĉ1,b,m(q) and the second coherence prediction Ĉ2,b,m are combined using the weight factor α;
determine the weight factor α based on a bit-budget Bm that specifies a number of bits available for encoding a vector of spatial coherence values in each frame and the received information; and
generate comfort noise for the at least two audio channels based on the weighted combination of the first coherence prediction Ĉ1,b,m(q) and the second coherence prediction Ĉ2,b,m.