EFFICIENT USE OF PHASE INFORMATION IN AUDIO ENCODING AND DECODING

摘要

An efficient encoded representation of a first and a second input audio signal can be derived us-ing correlation information indicating a correlation be-tween the first and the second input audio signals, when a signal characterization information, indicating at least a first or a second, different characteristic of the input au-dio signal is additionally considered. Phase information indicating a phase relation between the first and the sec-ond input audio signals is derived, when the input audio signals have the first characteristic. The phase informa-tion and a correlation measure are included into the en-coded representation when the input audio signals have the first characteristic, and only the correlation informa-tion is included into the encoded representation when the input audio signals have the second characteristic.