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

Claim 0:
1. An audio encoder for encoding an audio signal, the audio signal comprising a first audio signal portion and a timely subsequent second audio signal portion having an audio sampling rate, to generate an encoded audio signal, comprising:
a first encoding processor configured for encoding the first audio signal portion in a frequency domain to obtain a first encoded signal portion;
a second encoding processor configured for encoding the second audio signal portion in a time domain to obtain a second encoded signal portion, the second audio signal portion comprising a low band and a high band; and
a controller configured for analyzing a portion of the audio signal and for determining, that the portion of the audio signal is either the first audio signal portion encoded in the frequency domain or the second audio signal portion encoded in the time domain;
a cross-processor configured for calculating, from an encoded spectral representation of the first audio signal portion, initialization data of the second encoding processor, so that the second encoding processor is initialized to encode the second audio signal portion immediately following the first audio signal portion in time in the audio signal, wherein the cross-processor comprises a spectral decoder configured for calculating a decoded version of the first encoded signal portion, and a delay stage configured for feeding a delayed version of the decoded version of the first encoded signal portion into a de-emphasis stage of the second encoding processor for an initialization; and
an encoded signal former configured for forming the encoded audio signal comprising the first encoded signal portion for the first audio signal portion and the second encoded signal portion for the second audio signal portion.