Patent ID: 11935551
Assignee: DOLBY INTERNATIONAL AB
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A system for decoding an audio signal, the system comprising:
a core decoder for decoding a low frequency component of the audio signal;
an analysis filter bank for providing a plurality of analysis subband signals of the low frequency component of the audio signal;
a subband selection reception unit for receiving information associated with a fundamental frequency Ω of the audio signal, and for selecting, in response to the information, a first analysis subband signal and a second analysis subband signal from the plurality of analysis subband signals;
a non-linear processing unit to generate a synthesis subband signal from the first analysis subband signal and the second analysis subband signal, wherein a magnitude of the synthesis subband signal is based on a gain adjusted mean value of magnitudes of the first and second analysis subband signals, and a phase of the synthesis subband signal is based on a weighted sum of phases of the first and second analysis subband signals; and
a synthesis filter bank for generating a high frequency component of the audio signal from the synthesis subband signal;
wherein the information associated with the fundamental frequency Ω of the audio signal is received in an encoded bit stream.