Audio encoder and decoder
AssigneeDolby International AB
InventorsJeroen KOPPENS, Lars VILLEMOES, Toni HIRVONEN, Kristofer KJOERLING
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Abstract
This disclosure falls into the field of audio coding, in particular it is related to the field of spatial audio coding, where the audio information is represented by multiple audio objects including at least one dialog object. In particular the disclosure provides a method and apparatus for enhancing dialog in a decoder in an audio system. Furthermore, this disclosure provides a method and apparatus for encoding such audio objects for allowing dialog to be enhanced by the decoder in the audio system.
Claims22
A method for enhancing dialog in a decoder in an audio system, comprising the steps of:
- receiving a plurality of downmix signals, the downmix signals being a downmix of a plurality of audio objects including at least one object representing a dialog,
- receiving side information indicative of coefficients enabling reconstruction of the plurality of audio objects from the plurality of downmix signals,
- receiving data identifying which of the plurality of audio objects represents a dialog,
- modifying the coefficients by using an enhancement parameter and the data identifying which of the plurality of audio objects represents a dialog, and
- reconstructing at least the at least one object representing a dialog using the modified coefficients.
A decoder for enhancing dialog in an audio system, the decoder comprising:
- a receiving stage configured for:
- receiving a plurality downmix signals, the downmix signals being a downmix of a plurality of audio objects including at least one object representing a dialog,
- receiving side information indicative of coefficients enabling reconstruction of the plurality of audio objects from the plurality of downmix signals, and
- receiving data identifying which of the plurality of audio objects represents a dialog,
- a modifying stage configure for:
- modifying the coefficients by using an enhancement parameter and the data identifying which of the plurality of audio objects represents a dialog,
- a reconstructing stage configured for:
- reconstructing at least the at least one object representing a dialog using the modified coefficients.
A method for encoding a plurality of audio objects including at least one object representing a dialog, comprising the steps of:
- determining a plurality of downmix signals being a downmix of the plurality of audio objects including at least one object representing a dialog,
- determining side information indicative of coefficients enabling reconstruction of the plurality of audio objects from the plurality of downmix signals,
- determining data identifying which of the plurality of audio objects represents a dialog, and
- forming a bitstream comprising the plurality of downmix signals, the side information and the data identifying which of the plurality of audio objects represents a dialog.
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22-25. (canceled)
Dependencies are inferred from the claim text.