Luma mapping with chroma scaling adaptation parameter set in video coding
AssigneeHuawei Technologies Co., Ltd.
InventorsYe-Kui Wang, F N U Hendry, Jianle Chen
Life of this patent
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Abstract
A video coding mechanism is disclosed. The mechanism includes receiving a bitstream comprising a slice and a luma mapping with chroma scaling (LMCS) adaptation parameter set (APS) including LMCS parameters. The mechanism further includes determining that the LMCS APS is referenced in data related to the slice. The mechanism further includes decoding the slice using LMCS parameters from the LMCS APS based on the reference to the LMCS APS. The mechanism further includes forwarding the slice for display as part of a decoded video sequence.
Claims17
A method implemented by a decoder, the method comprising:
- receiving a bitstream comprising a luma mapping with chroma scaling (LMCS) adaptation parameter set (APS) including LMCS parameters associated with a coded slice;
- obtaining LMCS parameters from the LMCS APS associated with the coded slice;
- and
- decoding the coded slice using the LMCS parameters from the LMCS APS,
- wherein the bitstream further comprises an adaptive loop filter (ALF) APS containing ALF parameters,
- wherein each APS includes an APS identifier (ID) selected from a predefined range,
- wherein the predefined range is determined based on a parameter type of each APS, and
- wherein APSs of a particular type share the same value space for the APS IDs and different types of APSs use different value spaces of the APS IDs.
A method implemented by an encoder, the method comprising:
- determining luma mapping with chroma scaling (LMCS) parameters for a slice;
- encoding the slice into a bitstream as a coded slice;
- encoding the LMCS parameters into a LMCS adaptation parameter set (APS) of the bitstream;
- and
- encoding into the bitstream data related to the coded slice that references the LMCS APS,
- wherein the bitstream further comprises an adaptive loop filter (ALF) APS containing ALF parameters,
- wherein each APS includes an APS identifier (ID) selected from a predefined range, wherein the predefined range is determined based on a parameter type of each APS, and
- wherein APSs of a particular type share the same value space for the APS IDs and different types of APSs use different value spaces of the APS IDs.
A video coding device comprising:
- a receiver configured to receive a bitstream comprising a luma mapping with chroma scaling (LMCS) adaptation parameter set (APS) including LMCS parameters associated with a coded slice;
- and
- a processor coupled to the receiver and configured to:
- obtain LMCS parameters from the LMCS APS associated with the coded slice;
- and
- decode the coded slice using the LMCS parameters from the LMCS APS,
- wherein the bitstream further comprises an adaptive loop filter (ALF) APS containing ALF parameters,
- wherein each APS includes an APS identifier (ID) selected from a predefined range,
- wherein the predefined range is determined based on a parameter type of each APS, and
- wherein APSs of a particular type share the same value space for the APS IDs and different types of APSs use different value spaces of the APS IDs.
Dependencies are inferred from the claim text.