Method for processing an audio signal in accordance with a room impulse response, signal processing unit, audio encoder, audio decoder, and binaural renderer

A method for processing an audio signal in accordance with a room impulse response, the method comprising:

• separately processing, by a processing unit, the audio signal with an early part and a late reverberation of the room impulse response;
• and
• combining, by a processing unit, the audio signal processed with the early part of the room impulse response and a reverberated signal,
• wherein a transition from the early part to the late reverberation in the room impulse response is determined once a correlation measure reaches a threshold,
• wherein the correlation measure describes with regard to the room impulse response a similarity of a decay in acoustic energy comprising an initial state and of the decay in acoustic energy starting at a time following the initial state over a predefined frequency range,
• wherein the threshold is set dependent on the correlation measure for a selected one of the early reflections in the early part of the room impulse response,
• wherein the selected one of the early reflections is the first reflection, and
• wherein the processing unit comprises a hardware implementation.