Method for processing an audio signal; signal processing unit, binaural renderer, audio encoder and audio decoder
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsSimone FUEG, Jan PLOGSTIES
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Abstract
A method for processing an audio signal in accordance with a room impulse response is described. The audio signal is processed with an early part of the room impulse response separate from a late reverberation of the room impulse response, wherein the processing of the late reverberation has generating a scaled reverberated signal, the scaling being dependent on the audio signal. The processed early part of the audio signal and the scaled reverberated signal are combined.
Claims19
A method for processing an audio signal in accordance with a room impulse response, the method comprising:
- separately processing the audio signal with an early part and a late reverberation of the room impulse response, wherein processing the late reverberation comprises generating a scaled reverberated signal;
- and
- combining the audio signal processed with the early part of the room impulse response and the scaled reverberated signal,
- wherein generating a scaled reverberated signal comprises
- setting a gain factor according to a predefined correlation measure of the audio signal comprising a fixed value determined empirically on the basis of an analysis of a plurality of audio signals, and applying the gain factor, or
- calculating a correlation measure of the audio signal using a correlation analysis of the audio signal and the gain factor, and applying the gain factor.
A signal processing unit, comprising:
- an input for receiving an audio signal,
- an early part processor for processing the received audio signal in accordance with an early part of a room impulse response,
- a late reverberation processor for processing the received audio signal in accordance with a late reverberation of the room impulse response, the late reverberation processor configured to generate a scaled reverberated signal;
- and
- an output for combining the processed early part of the received audio signal and the scaled reverberated signal into an output audio signal,
- wherein the late reverberation processor configured to generate a scaled reverberated signal by
- setting a gain factor according to a predefined correlation measure of the audio signal comprising a fixed value determined empirically on the basis of an analysis of a plurality of audio signals, and applying the gain factor, or
- calculating a correlation measure of the audio signal using a correlation analysis of the audio signal and the gain factor, and applying the gain factor.
Dependencies are inferred from the claim text.