Patent ID: 11915713
Assignee: DOLBY INTERNATIONAL AB
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method, performed by an audio signal processing device, for determining an estimate of a sample of a subband signal from two or more previous samples of the subband signal, wherein the subband signal corresponds to one of a plurality of subbands of a subband-domain representation of an audio signal, the method comprising
determining signal model data comprising a model parameter;
determining a first prediction coefficient to be applied to a first previous sample of the subband signal; wherein the first prediction coefficient is determined in response to the model parameter using a first lookup table and/or a first analytical function;
determining a second prediction coefficient to be applied to a second previous sample of the subband signal; wherein a time slot of the second previous sample immediately precedes a time slot of the first previous sample; wherein the second prediction coefficient is determined in response to the model parameter using a second lookup table and/or a second analytical function; and
determining the estimate of the sample by applying the first prediction coefficient to the first previous sample and by applying the second prediction coefficient to the second previous sample;
wherein the method is implemented, at least in part, by one or more processors of the audio signal processing device.