METHODS FOR CONTROLLING THE INTER CHANNEL COHERENCE OF UPMIXED AUDIO SIGNALS

摘要

Audio characteristics of audio data corresponding to a plurality of audio channels may be determined. The audio characteristics may include spatial parameter data. Decorrelation filtering processes for the audio data may be based at least in part on the audio characteristics. The decorrelation filtering processes may cause a specific inter decorrelation signal coherence ('IDC') between channel specific decorrelation signals for at least one pair of channels. The channel specific decorrelation signals may be received and/or determined. Inter channel coherence ('ICC') between a plurality of audio channel pairs may be controlled. Controlling ICC may involve at receiving an ICC value and/or determining an ICC value based at least partially on the spatial parameter data. A set of IDC values may be based at least partially on the set of ICC values. A set of channel specific decorrelation signals corresponding with the set of IDC values may be synthesized by performing operations on the filtered audio data.