Device and method for manipulating an audio signal having a transient event

摘要

A signal manipulator for manipulating an audio signal having a transient event may have a transient remover, a signal processor and a signal inserter for inserting a time portion in a processed audio signal at a signal location where the transient event was removed before processing by the transient remover, so that a manipulated audio signal has a transient event not influenced by the processing, whereby the vertical coherence of the transient event is maintained instead of any processing performed in the signal processor, which would destroy the vertical coherence of a transient.

主权项

1. Apparatus for manipulating an audio signal comprising a transient event, comprising:
a signal processor, wherein the signal processor is configured for processing the audio signal comprising a first portion comprising the transient event to acquire a processed audio signal, wherein the signal processor is configured to generate a perceptually degraded transient portion in the processed audio signal by stretching or shortening the first portion of the audio signal comprising the transient event so that the processed audio signal comprises a duration greater than a duration of the first portion of the audio signal or smaller than a duration of the first portion of the audio signal; a signal inserter for inserting a second time portion into the processed audio signal at a signal location, where the perceptually degraded transient portion is located in the processed audio signal to obtain a manipulated audio signal, wherein the inserted second time portion includes an unmodified copy of the signal or a copy of the signal including the transient in which only a start portion or an end portion has been modified, wherein the signal inserter is configured to determine the second time portion so that the second time portion comprises the transient event not influenced by the processing performed by the signal processor to generate the perceptually degraded transient portion, and wherein the signal inserter is configured to determine the second time portion so that the second time portion comprises a duration different from the first time portion, wherein in the case of stretching, the second time portion is longer than the first time portion or in the case of shortening, the second time portion is smaller than the first time portion.