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US 12,587,652 B2Granted
Image coding device and method
AssigneeLG Electronics Inc.
InventorsHendry Hendry, Seethal Paluri, Seunghwan Kim
Life of this patent
Estimating the term…
Abstract
In relation to an in-loop filtering procedure described in the present document, a virtual boundary is defined so as to further increase the subjective/objective visual quality of a restored picture and the in-loop filtering procedure can be applied across the virtual boundary. The virtual boundary can include, for example, a discontinuous edge such as a 360-degree image, a VR image, or picture in picture (PIP). For example, the virtual boundary can be at a predetermined appointed position, and the existence and/or the position thereof can be signaled. Embodiments of the present document present a method for efficiently signaling virtual boundary-related information.
Claims3
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:
- receive image information including residual information and virtual boundaries-related information through a bitstream;
- derive reconstructed samples of a current picture, based on the residual information;
- perform an in-loop filtering process of the reconstructed samples to generate modified reconstructed samples;
- and
- determine whether the in-loop filtering process is enabled across virtual boundaries, based on a virtual boundaries enabled flag,
- wherein based on the determination whether the in-loop filtering process is enabled across the virtual boundaries, the virtual boundaries-related information is included in the image information, wherein the virtual boundaries-related information includes information on a number of the virtual boundaries and information on positions of the virtual boundaries,
- wherein the image information includes a sequence parameter set (SPS), and picture header information referring to the SPS,
- wherein the SPS includes the virtual boundaries enabled flag and an SPS virtual boundaries present flag,
- wherein whether signaling of the virtual boundaries-related information is present in the SPS or the picture header information is determined based on a value of the SPS virtual boundaries present flag,
- wherein based on the value of the SPS virtual boundaries present flag being 1, the virtual boundaries-related information is included in the SPS, and
- wherein based on the value of the SPS virtual boundaries present flag being 0, the virtual boundaries-related information is included in the picture header information.
11 more elements
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 residual samples for a current block;
- generate residual information, based on the residual samples for the current block;
- determine whether an in-loop filtering process is enabled across virtual boundaries;
- generate virtual boundaries-related information, based on the determination;
- and
- encode image information including the residual information and the virtual boundaries-related information,
- wherein based on the determination whether the in-loop filtering process is enabled across the virtual boundaries, the image information includes the virtual boundaries-related information, wherein the virtual boundaries-related information includes information on a number of the virtual boundaries and information on positions of the virtual boundaries,
- wherein the image information includes a sequence parameter set (SPS), and picture header information referring to the SPS,
- wherein the SPS includes a virtual boundaries enabled flag and an SPS virtual boundaries present flag,
- wherein the virtual boundaries enabled flag is related to whether the in-loop filtering process is enabled across the virtual boundaries,
- wherein whether signaling of the virtual boundaries-related information is present in the SPS or the picture header information is related to a value of the SPS virtual boundaries present flag,
- wherein based on the value of the SPS virtual boundaries present flag being 1, the virtual boundaries-related information is signaled in the SPS, and
- wherein based on the value of the SPS virtual boundaries present flag being 0, the virtual boundaries-related information is signaled in the picture header information.
13 more elements
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 deriving residual samples for a current block, generating residual information, based on the residual samples for the current block, determining whether an in-loop filtering process is enabled across virtual boundaries, generating virtual boundaries-related information, based on the determination, and encoding image information including the residual information and the virtual boundaries-related information;
- and
- a transmitter configured to transmit the data comprising the bitstream,
- wherein based on the determination whether the in-loop filtering process is enabled across the virtual boundaries, the image information includes the virtual boundaries-related information, wherein the virtual boundaries-related information includes information on a number of the virtual boundaries and information on positions of the virtual boundaries,
- wherein the image information includes a sequence parameter set (SPS), and picture header information referring to the SPS,
- wherein the SPS includes a virtual boundaries enabled flag and an SPS virtual boundaries present flag,
- wherein the virtual boundaries enabled flag is related to whether the in-loop filtering process is enabled across the virtual boundaries,
- wherein whether signaling of the virtual boundaries-related information is present in the SPS or the picture header information is related to a value of the SPS virtual boundaries present flag,
- wherein based on the value of the SPS virtual boundaries present flag being 1, the virtual boundaries-related information is signaled in the SPS, and
- wherein based on the value of the SPS virtual boundaries present flag being 0, the virtual boundaries-related information is signaled in the picture header information.
7 more elements
Dependencies are inferred from the claim text.