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 22:
23. A system for processing an audio signal, comprising:
an audio encoder configured for encoding the audio signal to obtain an encoded audio signal, the audio encoder comprising:
a core encoder configured for 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;
a parametric coder configured for parametrically coding second audio data of the audio signal in a second spectral band being different from the first spectral band, wherein the parametric coder comprises:
an analyzer configured for analyzing the first audio data in the first spectral band to acquire a first analysis result and for 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;
a compensator configured for calculating a compensation value using the first analysis result and the second analysis result; and
a parameter calculator configured for calculating a parameter from the second audio data in the second spectral band using the compensation value; and

an output interface configured for 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; and

a decoder configured for receiving the encoded audio signal, the encoded audio signal comprising the core-encoded audio data for the first spectral band and the parameter for the second spectral band,
wherein the decoder is configured for 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.