Patent ID: 11929084
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 26:
27. A method of decoding an encoded audio signal comprising a first encoded audio signal portion and a second encoded audio signal portion to obtain a decoded audio signal, comprising:
first decoding the first encoded audio signal portion in a frequency domain to acquire a decoded time domain first audio signal portion;
second decoding the second encoded audio signal portion in the time domain to acquire a decoded second time domain audio signal portion having a low band and a high band; and
combining the decoded time domain first audio signal portion and the decoded time domain second audio signal portion to acquire the decoded audio signal,
wherein the method further comprises calculating, from the decoded spectral representation of the first encoded audio signal portion, initialization data of the second decoding, so that the second decoding is initialized to decode the encoded second audio signal portion following in time the first audio signal portion in the encoded audio signal, wherein the calculating comprises:
converting the decoded spectral representation to obtain a further decoded first signal portion in the time domain; filtering the further decoded first signal portion to obtain a filtered version; and delaying the filtered version to obtain a delayed output and feeding the delayed output into a prediction synthesis filtering of the second decoding for an initialization, or converting the decoded spectral representation to obtain a further decoded first signal portion in the time domain; and feeding either the further decoded first signal portion or a delayed further decoded first signal portion into an analysis step of a resampling of the second decoding for an initialization.