Image coding device and method
AssigneeLG Electronics Inc.
InventorHendry HENDRY
Life of this patent
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Abstract
A (decoded) picture may be split into subpictures/tiles. Information on the subpictures may be obtained by a decoding device, and a decoding procedure may be performed on the basis of the information on the subpictures. In addition, information on the tiles may be obtained by a decoding device, and a decoding procedure may be performed on the basis of the information on the tiles. According to embodiments of the present document, subpicture-related information and tile-related information can be efficiently signaled, and an in-loop filtering procedure can be performed on the basis of the subpicture-related information.
Claims5
A decoding apparatus for image decoding, the decoding apparatus comprising:
- a memory;
- and
- at least one processor connected to the memory, the at least one processor configured to:
- obtain image information including residual information and subpicture related information through a bitstream;
- derive subpictures for a current picture based on the subpicture related information;
- generate reconstructed samples of the current picture based on the residual information and the subpictures;
- and
- generate modified reconstructed samples based on an in-loop filtering process for the reconstructed samples,
- wherein the image information includes a sequence parameter set (SPS) and tile related information,
- wherein the current picture includes the subpictures and tiles based on the subpicture related information and the tile related information, and
- wherein coding tree units (CTUs) included in one tile belong to a same subpicture, and CTUs included in one subpicture belong to a same tile.
An encoding apparatus for image encoding, the encoding apparatus comprising:
- a memory;
- and
- at least one processor connected to the memory, the at least one processor configured to:
- derive subpictures for a current block;
- generate subpicture related information based on the subpictures;
- derive residual samples for the current block;
- generate residual information based on the residual samples for the current block;
- generate in-loop filtering related information based on whether an in-loop filtering process is performed across virtual boundaries;
- and
- encode image information based on the subpicture related information, the residual information, and the in-loop filtering related information,
- wherein the image information includes a sequence parameter set (SPS) and tile related information,
- wherein the current picture includes the subpictures and tiles based on the subpicture related information and the tile related information, and
- wherein coding tree units (CTUs) included in one tile belong to a same subpicture, and CTUs included in one subpicture belong to a same tile.
An apparatus for transmitting data for an image, the apparatus comprising:
- at least one processor configured to obtain a bitstream generated by an encoding method performed by an encoding apparatus for image encoding;
- and
- a transmitter configured to transmit the bitstream,
- wherein the encoding method comprising:
- deriving subpictures for a current block;
- generating subpicture related information based on the subpictures;
- deriving residual samples for the current block;
- generating residual information based on the residual samples for the current block;
- generating in-loop filtering related information based on whether an in-loop filtering process is performed across virtual boundaries;
- and
- encoding image information based on the subpicture related information, the residual information, and the in-loop filtering related information,
- wherein the image information includes a sequence parameter set (SPS) and tile related information,
- wherein the current picture includes the subpictures and tiles based on the subpicture related information and the tile related information, and
- wherein coding tree units (CTUs) included in one tile belong to a same subpicture, and CTUs included in one subpicture belong to a same tile.
Dependencies are inferred from the claim text.