Patent ID: 11910182
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 13:
14. A signal processing unit, comprising:
an input for receiving an audio signal,
an early part processor receiving a direct sound and early reflections of the room impulse response and processing the audio signal using the direct sound and early reflections to obtain a processed audio signal,
a late reverberation processor receiving as input signal the audio signal, wherein the late reverberation processor is to receive predefined reverberator parameters and to process the audio signal using the predefined reverberator parameters to obtain a reverberated signal and to scale the reverberated signal to obtain a scaled reverberated signal; and
an output for combining the processed audio signal and the scaled reverberated signal into an output audio signal,
wherein processing the audio signal by the late reverberation processor comprises a scaling to obtain a scaled reverberated signal, and
wherein the scaling comprises:
setting a gain factor according to a predefined correlation measure of the audio signal, the predefined correlation measure having a fixed value determined empirically on the basis of an analysis of a plurality of audio signals, and applying the gain factor, or
obtaining a gain factor using a correlation analysis of the audio signal, and applying the gain factor.