Filtering-based image coding device and method
AssigneeLG Electronics Inc.
InventorsHendry Hendry, Seethal Paluri, Seunghwan Kim
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Abstract
According to embodiments described herein, sub-pictures and/or virtual boundaries can be used for coding an image. For example, sub-pictures in the current picture can be used for predicting, reconstructing, and/or filtering the current picture. Virtual boundaries can be used for filtering reconstructed samples of the current picture. Through image coding based on the subpictures and/or virtual boundaries according to embodiments described herein, the subjective/objective quality of an image can be improved, and the consumption of hardware resources necessary for the coding can be reduced.
Claims4
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 reference picture-related information through a bitstream;
- derive at least one reference picture, based on the reference picture-related information;
- generate reconstructed samples of a current picture, based on the residual information and the at least one reference picture;
- 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),
- wherein based on whether resampling for the at least one reference picture is enabled, it is determined whether the SPS includes additional virtual boundaries-related information,
- wherein the SPS includes an SPS virtual boundaries present flag related to whether the SPS includes the additional virtual boundaries-related information, and
- wherein based on that the resampling for the at least one reference picture is enabled, a value of the SPS virtual boundaries present flag is determined to be 0.
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:
- generate residual samples for a current block;
- generate residual information, based on the residual samples for the current block;
- derive at least one reference picture for reconstructed samples of a current picture;
- generate reference picture-related information, based on the at least one reference picture;
- generate in-loop filtering-related information for reconstructed samples of the current picture;
- and
- encode image information including the residual information, the reference picture-related information, and the in-loop filtering-related information,
- wherein the image information includes a sequence parameter set (SPS),
- wherein based on whether resampling for the at least one reference picture is enabled, it is determined whether the SPS includes additional virtual boundaries-related information,
- wherein the SPS includes an SPS virtual boundaries present flag related to whether the SPS includes the additional virtual boundaries-related information, and
- wherein based on that the resampling for the at least one reference picture is enabled, a value of the SPS virtual boundaries present flag is determined to be 0.
An apparatus for transmitting data for an image, the apparatus comprising:
- at least one processor configured to obtain a bitstream for the image, wherein the bitstream is generated based on generating residual samples for a current block, generating residual information, based on the residual samples for the current block, deriving at least one reference picture for reconstructed samples of a current picture, generating reference picture-related information, based on the at least one reference picture, generating in-loop filtering-related information for reconstructed samples of the current picture, and encoding image information including the residual information, the reference picture-related information, and the in-loop filtering-related information;
- and
- a transmitter configured to transmit the data comprising the bitstream,
- wherein the image information includes a sequence parameter set (SPS),
- wherein based on whether resampling for the at least one reference picture is enabled, it is determined whether the SPS includes additional virtual boundaries-related information,
- wherein the SPS includes an SPS virtual boundaries present flag related to whether the SPS includes the additional virtual boundaries-related information, and
- wherein based on that the resampling for the at least one reference picture is enabled, a value of the SPS virtual boundaries present flag is determined to be 0.
Dependencies are inferred from the claim text.