Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Koninklijke Philips Corporation N.V.

Dolby International Ab

Coding Technologies Ab

Dolby Sweden Ab

Koninklijke Philips Electronics N.v.

Werner Oomen

Heiko Purnhagen

Jonas Engdegard

Jeroen Dirk Breebaart

Erik Schuijers

Lars Villemoes

Sascha Disch

Kristofer Kjoerling

Juergen Herre

Matthias Neusinger

Jürgen Herre

Kristofer Kjörling

Johannes Hilpert

Dirk Jeroen Breebaart

Ralph Sperschneider

Andreas Hoelzer

Karsten Linzmeier

Andreas Hölzer

Jonas Röden

Jurgen Herre

Andreas Holzer

Kristofer Kjorling

Jeroen Breebaart

Lars Villemos

A parameter transformer generates level parameters, indicating an energy relation between a first and a second audio channel of a multi-channel audio signal associated to a multi-channel loudspeaker configuration. The level parameter are generated based on object parameters for a plurality of audio objects associated to a down-mix channel, which is generated using object audio signals associated to the audio objects. The object parameters have an energy parameter indicating an energy of the object audio signal. To derive the coherence and the level parameters, a parameter generator is used, which combines the energy parameter and object rendering parameters, which depend on a desired rendering configuration.

Apparatus and method for multi-channel parameter transformation

An apparatus and a method for generating a multi-channel synthesizer control signal, a multi-channel synthesizer, a method of generating an output signal from an input signal and a machine-readable storage medium are provided. On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.

Apparatus and method for generating a multi-channel synthesizer control signal, multi-channel synthesizer, method of generating an output signal from an input signal and machine-readable storage medium

On an encoder-side, a multi-channel input signal is analyzed for obtaining smoothing control information, which is to be used by a decoder-side multi-channel synthesis for smoothing quantized transmitted parameters or values derived from the quantized transmitted parameters for providing an improved subjective audio quality in particular for slowly moving point sources and rapidly moving point sources having tonal material such as fast moving sinusoids.

Apparatus and method for generating multi-channel synthesizer control signal and apparatus and method for multi-channel synthesizing

A parametric representation of a multi-channel audio signal describes the spatial properties of the audio signal well with compact side information when a coherence information, describing the coherence between a first and a second channel, is derived within a hierarchical encoding process only for channel pairs including a first channel having only information of a left side with respect to a listening position and including a second channel having only information from a right side with respect to a listening position. As within the hierarchical process the multiple audio channels of the audio signal are downmixed iteratively into monophonic channels, one can pick the relevant parameters from an encoding step involving only channel pairs carrying the information needed to describe the spatial properties of the multi-channel audio signal.

Multi-channel hierarchical audio coding with compact side information

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Eindhoven, Netherlands

Werner Oomen