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US 12,744,884 B2Granted
Encoder, decoder, encoding method, decoding method, and medium
AssigneePanasonic Intellectual Property Corporation of America
InventorsTakahiro Nishi, Tadamasa Toma, Kiyofumi Abe
Life of this patent
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Abstract
An encoder includes circuitry and memory coupled to the circuitry. In operation, the circuitry switches between storing and not storing of a decoded picture buffer (DPB) parameter related to a DPB in a common header shared between layers in layer groups each including at least one output layer, according to whether or not all the layer groups in a bitstream each include only one layer.
Claims4
An encoder comprising:
- circuitry;
- and
- memory coupled to the circuitry, wherein
- the circuitry, in operation,
- determines whether or not all layer groups in a bitstream each include only one layer, the layer groups each including at least one output layer, based on a flag in a video parameter set (VPS),
- switches between storing and not storing of a maximum value of a temporal layer ID in the VPS, according to whether or not the all layer groups each include only one layer, and
- generates a bitstream including the VPS.
4 more elements
A decoder comprising:
- circuitry;
- and
- memory coupled to the circuitry, wherein
- the circuitry, in operation,
- determines whether or not all layer groups in a bitstream each include only one layer, the layer groups each including at least one output layer, based on a flag in a video parameter set (VPS), and
- switches between deriving and not deriving of a maximum value of a temporal layer ID from the VPS, according to whether or not the all layer groups each include only one layer.
3 more elements
An encoding method comprising:
- determining whether or not all layer groups in a bitstream each include only one layer, the layer groups each including at least one output layer, based on a flag in a video parameter set (VPS);
- and
- switching between storing and not storing of a maximum value of a temporal layer ID in the VPS, according to whether or not the all layer groups each include only one layer.
A decoding method comprising:
- determining whether or not all layer groups in a bitstream each include only one layer, the layer groups each including at least one output layer, based on a flag in a video parameter set (VPS);
- and
- switching between deriving and not deriving of a maximum value of a temporal layer ID from the VPS, according to whether or not the all layer groups each include only one layer.
Dependencies are inferred from the claim text.