DEVICE AND METHOD FOR POSTPROCESSING DECODED MULTI-CHANNEL AUDIO SIGNAL OR DECODED STEREO SIGNAL

摘要

A device (101';201') for postprocessing at least one channel signal of a plurality of channel signals of a multi-channel signal is provided, in which the at least one channel signal is generated from a decoded downmix signal by a low-bit-rate audio coding/decoding system. The device (101';201') comprises: a receiver (103') for receiving the at least one channel signal generated from the decoded downmix signal, a time envelope of the decoded downmix signal, an interchannel time difference between the channel signal and the downmix signal, and a classification indication indicating a transient type of the downmix signal; and a postprocessor (105',213',215') for postprocessing the at least one channel signal based on the time envelope of the decoded downmix signal which is weighted by a respective weighting factor and is in dependence on the classification indication and the interchannel time difference.