Efficient coding of audio scenes comprising audio objects
AssigneeDolby International AB
InventorsHeiko PURNHAGEN, Kristofer KJOERLING, Toni HIRVONEN, Lars VILLEMOES, Dirk Jeroen BREEBAART
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Abstract
There is provided encoding and decoding methods for encoding and decoding of object based audio. An exemplary encoding method includes inter alia calculating M downmix signals by forming combinations of N audio objects, wherein M≤N, and calculating parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M downmix signals. The calculation of the M downmix signals is made according to a criterion which is independent of any loudspeaker configuration.
Claims9
A method in a decoder for decoding a data stream including encoded audio objects, comprising:
- receiving a data stream comprising M signals which are combinations of N audio objects, wherein the M signals is based on spatial locations of the N audio objects and on importance values of the N audio objects indicating the importance of the N audio objects in relation to each other,
- receiving side information including parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M signals;
- and
- reconstructing the set of encoded audio objects formed on basis of the N audio objects from the M signals and the side information,
- wherein the set of audio objects formed on basis of the N audio objects comprises a plurality of audio objects which are combinations of the N audio objects, and the number of which is lower than N.
A decoder for decoding a data stream including encoded audio objects, comprising:
- a receiving component configured to receive receiving a data stream comprising M signals which are combinations of N audio objects, wherein the M signals is based on spatial locations of the N audio objects and on importance values of the N audio objects indicating the importance of the N audio objects in relation to each other,
- the receiving component configured to receive side information including parameters which allow reconstruction of a set of audio objects formed on basis of the N audio objects from the M signals;
- and
- a reconstructing component configured to reconstruct the set of encoded audio objects formed on basis of the N audio objects from the M signals and the side information,
- wherein the set of audio objects formed on basis of the N audio objects comprises a plurality of audio objects which are combinations of the N audio objects, and the number of which is lower than N.
Dependencies are inferred from the claim text.