Patent ID: 9443526
Filing Date: 2016-09-13
CPC Classification: G10L

Claim Text:
1. A method of generating Comfort Noise (CN) control parameters, comprising: storing CN parameters for Silence Insertion Descriptor (SID) frames and active hangover frames in a buffer of a predetermined size (M); determining a CN parameter subset relevant for SID frames based on an age of the stored CN parameters and on residual energies; using the determined CN parameter subset to determine the CN control parameters for a first SID frame following an active signal frame; updating, for the SID frames and the active hangover frames, the buffer with new CN parameters; updating, for active non-hangover frames, a size K of an age restricted subset of the stored CN parameters based on a number p selecting the CN parameter subset from the age restricted subset based on the residual energies; determining representative CN parameters from the CN parameter subset; and interpolating the representative CN parameters with decoded CN parameters.