Patent ID: 8687829
Filing Date: 2014-04-01
Classification: G10L,H04S

Abstract:
1. Multi-channel parameter transformer for generating a level parameter indicating an energy relation between a first audio signal and a second audio signal of a representation of a multi-channel spatial audio signal, comprising: an object parameter provider for providing object parameters for a plurality of audio objects associated to a down-mix channel depending on object audio signals associated to the audio objects, the object parameters comprising an energy parameter for each audio object indicating an energy information of the object audio signal; and a parameter generator for deriving the level parameter by combining the energy parameters and object rendering parameters related to a rendering configuration, wherein the parameter generator is additionally adapted to derive a coherence parameter based on the object rendering parameters and the energy parameter, the coherence parameter indicating a correlation between the first audio signal and the second audio signal, wherein the object parameter provider is adapted to provide parameters for a stereo object, the stereo object having a first stereo sub-object and a second stereo sub-object, the energy parameters having a first energy parameter σ wherein the parameter generator is adapted to use first and second weighting parameters as object rendering parameters, which indicate a portion of the energy of the object audio signal to be distributed to a first and a second loudspeaker of the multi-channel loudspeaker configuration, the first and second weighting parameters depending on loudspeaker parameters indicating a location of loudspeakers of the multi-channel loudspeaker configuration, the first and second weighting parameters comprising w wherein the parameter generator is operative to derive the level parameter and the coherence parameter based on a power estimation p