Patent ID: 11894002
Assignee: DOLBY INTERNATIONAL AB
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 16:
17. Method of audio decoding for processing a time discrete input audio signal, comprising:
receiving, by a synthesis filterbank comprising a synthesis filterbank input, at the synthesis filterbank input, a plurality of time discrete first subband signals representing the time discrete input audio signal and having been generated by an analysis filterbank,
synthesizing, by the synthesis filterbank, an audio intermediate signal from the plurality of time discrete first subband signals representing the time discrete input audio signal, and outputting the audio intermediate signal, wherein a number of channels of the synthesis filterbank is smaller than a number of channels of the analysis filterbank; and
receiving, by a further analysis filterbank comprising a further analysis filterbank input, at the further analysis filterbank input, the audio intermediate signal;
generating, by the further analysis filterbank, a plurality of time discrete second subband signals from the audio intermediate signal, and outputting the plurality of time discrete second subband signals, wherein the further analysis filterbank comprises a number of channels being different from the number of channels of the synthesis filterbank, and
wherein a sampling rate of a time discrete subband signal of the plurality of second time discrete subband signals is different from a sampling rate of a time discrete first subband signal of the plurality of time discrete first subband signals.