Model Based Prediction in a Critically Sampled Filterbank

An audio signal processing device configured to determine 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;

• wherein the audio signal processing device comprises a predictor calculator configured to
• determine signal model data comprising a model parameter;
• determine a first prediction coefficient to be applied to a first previous sample of the subband signal;
• wherein a time slot of the first previous sample immediately precedes a time slot of the first sample;
• wherein the first prediction coefficient is determined in response to the model parameter using a first lookup table and/or a first analytical function;
• and
• determine 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
• a subband predictor configured to determine the estimate of the first 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 plurality of subbands have an equal subband spacing, and one or more of the predictor calculator and the subband predictor are implemented, at least in part, by one or more processors of the audio signal processing device.