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 configured for processing an audio signal comprising a first time portion of the audio signal, the first time portion comprising the transient event to acquire a processed audio signal; a signal inserter configured for inserting a second time portion into the processed audio signal at a signal location where the transient event is located in the processed audio signal, so that a manipulated audio signal is acquired, wherein the signal processor is configured to perform, in the processing of the audio signal, a stretching of the first time portion of the audio signal, the first time portion of the audio signal comprising the transient event, to obtain a stretched first time portion comprising a stretched transient event, wherein the stretched first time portion has a duration equal to a duration of the second time portion, the duration of the second time portion is longer in time than a duration of the first time portion, and wherein the signal inserter is configured to copy the first time portion of the audio signal comprising the transient event and a signal portion of the audio signal before the transient event or a signal portion of the audio signal after the transient event to obtain the second time portion of the audio signal, wherein a length of the signal portion before the transient event or a length of the signal portion after the transient event is determined so that the length of the signal portion before the transient event or the length of the signal portion after the transient event added to a length of the first time portion is equal to the duration of the second time portion, and wherein the signal inserter is configured to cut out the stretched first time portion from the processed audio signal and to insert the second time portion into the processed audio signal at a signal location where the stretched first time portion has been cut out.