Patent ID: 11962992
Assignee: NOKIA TECHNOLOGIES OY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 0:
1. An apparatus configured to process a multi-channel input audio signal representing a sound field into a multi-channel output audio signal in accordance with a predefined loudspeaker layout, the apparatus comprising at least one processor; and at least one memory including computer program code, which when executed by the at least one processor, causes the apparatus to:
obtain spatial audio parameters associated with said sound field;
estimate a signal energy of the sound field, wherein estimating the signal energy of the sound field comprises determining a respective input signal energy for at least two channels of the multi-channel input audio signal; and selecting a maximum signal energy of the input signal energies;
estimate, based on said selected maximum signal energy and the obtained spatial audio parameters, respective output signal energies for channels of the multi-channel output audio signal according to said predefined loudspeaker layout;
determine a maximum output energy of said multi-channel output audio signal based on the estimated respective output signal energies; and
determine, on basis of said maximum output energy, a gain value for adjusting sound reproduction gain in at least one of said channels of the multi-channel output audio signal in synthesis with the multi-channel output audio signal.