Patent ID: 11862184
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 22:
23. Non-transitory storage medium having stored thereon a computer readable code for performing, when running on a computer or a processor, a method for processing an encoded audio signal, the encoded audio signal comprising a sequence of audio access units, each audio access unit of the sequence of audio access units comprising a core audio signal and parameters associated with the core audio signal, the method comprising:
extracting, from an audio access unit of the sequence of audio access units of the encoded audio signal, the core audio signal having an audio content limited to a first spectral width having a maximum frequency, and the parameters describing an audio content of a missing spectrum having frequencies, with respect to frequency, above the maximum frequency of the first spectral width;
upsampling the core audio signal of the audio access unit to obtain a first upsampled spectrum and a timely consecutive second upsampled spectrum for the audio access unit, wherein the upsampling is performed such that each upsampled spectrum of the first upsampled spectrum and the second upsampled spectrum comprises an audio content being identical to the audio content of the core audio signal, and
such that each upsampled spectrum of the first upsampled spectrum and the second upsampled spectrum comprises a second spectral width, the second spectral width being greater than the first spectral width of the core audio signal, and the second spectral width having frequencies being higher than the maximum frequency of the first spectral width;
converting the parameters of the audio access unit to acquire converted parameters of the audio access unit, the converted parameters being applicable to the first upsampled spectrum and the second upsampled spectrum; and
processing the first upsampled spectrum of the audio access unit and the second upsampled spectrum of the audio access unit using the converted parameters of the audio access unit.