Patent ID: 11894002
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 14:
15. Audio decoder comprising an apparatus for processing a time discrete input audio signal, comprising:
an analysis filterbank comprising an analysis filterbank and comprising a number of analysis filterbank channels, wherein the analysis filterbank is configured for receiving, at the analysis filterbank input, the time discrete input audio signal and is configured for filtering the time discrete input audio signal to acquire a plurality of first subband signals and to output the plurality of first subband signals; and
a synthesis filterbank comprising a synthesis filterbank input, the synthesis filterbank being configured to receive, at the synthesis filterbank input, a group of first subband signals of the plurality of first subband signals output by the analysis filterbank, and to synthesize and output a time discrete audio intermediate signal using the group of first subband signals, where the group of first subband signals comprises a smaller number of subband signals than the number of analysis filterbank channels of the analysis filterbank,
wherein the time discrete audio intermediate signal has a bandwidth being smaller than a bandwidth of the time discrete input audio signal, or wherein a sampling rate of the time discrete audio intermediate signal is smaller than a sampling rate of the time discrete input audio signal.