Patent ID: 11935549
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 23:
24. A method of processing an audio signal, comprising:
encoding the audio signal, the encoding comprising:
core encoding first audio data of the audio signal in a first spectral band; to obtain a core-encoded audio signal for the first spectral band
parametrically coding second audio data of the audio signal in a second spectral band being different from the first spectral band, wherein the parametrically coding comprises:
analyzing the first audio data in the first spectral band to acquire a first analysis result and analyzing the second audio data in the second spectral band to acquire a second analysis result, wherein the second spectral band is different from the first spectral band;
calculating a compensation value using the first analysis result and the second analysis result; and
calculating a parameter from the second audio data in the second spectral band using the compensation value,

and
outputting the encoded audio signal, the encoded audio signal comprising the core-encoded audio data for the first spectral band and the parameter calculated from the second audio data in the second spectral band using the compensation value;

receiving the encoded audio signal comprising the core-encoded audio data for the first spectral band and the parameter for the second spectral band; and
performing a spectral enhancement operation in order to regenerate synthesized audio data for the second spectral band using the parameter and decoded core-encoded audio data for the first spectral band derived from the core-encoded audio data for the first spectral band.