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US 12,615,396 B2Granted
Image coding device and method for controlling loop filtering
AssigneeLG Electronics Inc.
InventorsHendry Hendry, Seethal Paluri, Seunghwan Kim
Life of this patent
Estimating the term…
Abstract
According to embodiments of the present document, the subjective/objective quality of an image can be improved through image coding on the basis of subpictures and/or virtual boundaries, and consumption of hardware resources required for coding can be reduced.
Claims3
An image decoding method performed by a decoding apparatus, comprising:
- obtaining image information including prediction-related information and residual information through a bitstream;
- generating prediction samples for a current block based on the prediction-related information;
- generating residual samples for the current block based on the residual information;
- generating reconstructed samples for the current block based on the prediction samples and the residual samples;
- and
- generating 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 picture header information referring to the SPS,
- wherein whether additional virtual boundaries-related information is included in the SPS or included in the picture header information is determined based on whether a reference picture resampling is enabled,
- wherein the additional virtual boundaries-related information is included in the picture header information based on a case that the reference picture resampling is enabled, and
- wherein the additional virtual boundaries-related information includes information on the number of vertical virtual boundaries, information on positions of the vertical virtual boundaries, information on the number of horizontal virtual boundaries, and information on positions of the horizontal virtual boundaries.
7 more elements
An image encoding method performed by an encoding apparatus, comprising:
- deriving prediction samples for a current block based on a prediction mode;
- generating prediction-related information for the prediction mode;
- deriving residual samples for the current block;
- generating residual information based on the residual samples;
- determining whether an in-loop filtering process is performed across virtual boundaries;
- generating in-loop filtering-related information for reconstructed samples of the current block, based on the determination;
- and
- encoding image information including the prediction-related information, the residual information and the in-loop filtering-related information,
- wherein the image information includes a sequence parameter set (SPS) and picture header information referring to the SPS,
- wherein whether additional virtual boundaries-related information is included in the SPS or included in the picture header information is determined based on whether a reference picture resampling is enabled,
- wherein the additional virtual boundaries-related information is included in the picture header information based on a case that the reference picture resampling is enabled, and
- wherein the additional virtual boundaries-related information includes information on the number of vertical virtual boundaries, information on positions of the vertical virtual boundaries, information on the number of horizontal virtual boundaries, and information on positions of the horizontal virtual boundaries.
9 more elements
A transmission method of data for an image, the method comprising:
- obtaining a bitstream for the image, wherein the bitstream is generated based on deriving prediction samples for a current block based on a prediction mode, generating prediction-related information for the prediction mode, deriving residual samples for the current block, generating residual information based on the residual samples, determining whether an in-loop filtering process is performed across virtual boundaries, generating in-loop filtering-related information for reconstructed samples of the current block, based on the determination, encoding image information including the prediction-related information, the residual information and the in-loop filtering-related information;
- and
- transmitting the data comprising the bitstream,
- wherein the image information includes a sequence parameter set (SPS) and picture header information referring to the SPS,
- wherein whether additional virtual boundaries-related information is included in the SPS or included in the picture header information is determined based on whether a reference picture resampling is enabled,
- wherein the additional virtual boundaries-related information is included in the picture header information based on a case that the reference picture resampling is enabled, and
- wherein the additional virtual boundaries-related information includes information on the number of vertical virtual boundaries, information on positions of the vertical virtual boundaries, information on the number of horizontal virtual boundaries, and information on positions of the horizontal virtual boundaries.
4 more elements
Dependencies are inferred from the claim text.