APPARATUS AND METHOD FOR HANDLING TRANSIENT SOUND EVENTS IN AUDIO SIGNALS WHEN CHANGING THE REPLAY SPEED OR PITCH

摘要

An apparatus for processing an audio signal comprises an overlap-add stage for overlapping and adding blocks of a corresponding one of a plurality of subband signals using an overlap-add-advance value being different from a block extraction advance value. The apparatus further comprises a transient detector for detecting a transient in the audio signal or a subband signal of the plurality of subband signals. The overlap-add stage is configured for reducing an influence of a detected transient or for not using the detected transients when adding. The apparatus further comprises a transient adder for adding a detected transient to a subband signal generated by the overlap/add stage. A related method for processing an audio signal comprises, inter alia, either reducing an influence or discarding a detected transient when overlapping and adding.