METHOD FOR PROCESSING AN AUDIO SIGNAL IN ACCORDANCE WITH A ROOM IMPULSE RESPONSE, SIGNAL PROCESSING UNIT, AUDIO ENCODER, AUDIO DECODER, AND BINAURAL RENDERER

摘要

A method for processing an audio signal (400) in accordance with a room impulse response includes separately processing (402, 404, 406) the audio signal (400) with an early part of the room impulse response and with a late reverberation of the room impulse response or a synthetic reverberation, wherein processing (402, 404) the audio signal with the early part of the room impulse response comprises a convolution of the audio signal with a direct sound and early reflections of the room impulse response; combining (418) the audio signal (414) processed with the early part of the room impulse response and the audio signal (416) processed with the late reverberation of the room impulse response or with the synthetic reverberation; and determining a transition from the early part to the late reverberation in the room impulse response as a time when a correlation measure reaches a threshold. The correlation measure describes with regard to the room impulse response a similarity of a decay in acoustic energy including an initial state and of the decay in acoustic energy starting at a point in time, said point in time following the initial state over a predefined frequency range. The threshold is set dependent on the correlation measure for said point in time, said point in time being a time of a selected one of the early reflections in the early part of the room impulse response. The selected one of the early reflections is the first reflection.