JPWO2021055138A5

JPWO2021055138A5 -

Info

Publication number: JPWO2021055138A5
Application number: JP2022514463A
Authority: JP
Publication date: 2023-08-10

Claims

A method of decoding a bitstream to output one or more pictures for a video stream, comprising :
receiving a bitstream ; and
Decoding one or more pictures using coded information of the bitstream.
and said decrypting includes:
determining a first parameter of the coding block;
determining one or more second parameters associated with a delta quantization parameter (QP) value or a chroma QP offset value according to the first parameter; and at least one of the delta QP value or the chroma QP offset value. determining one according to the one or more second parameters.

Determining the first parameter of the coded block comprises:
determining whether the coded block is associated with an intra-predicted slice or an inter-predicted slice; and depending on whether the coded block is associated with the intra-predicted slice, the first parameter is set to the intra-predicted slice. or responsive to said coded block being associated with said inter-predicted slice, determining said first parameter to be a parameter associated with said inter-predicted slice. 2. The method of claim 1, comprising:

2. The method of claim 1, wherein the first parameter is signaled in at least one of a slice header or picture header associated with the coded block.

wherein the coded block is associated with an intra-predicted slice, the method comprising:
a size of a per-coding-tree luma coded treeblock associated with the intra-prediction slice, a minimum size of luma samples within a luma leaf block resulting from a quadtree partitioning per-coding-tree associated with the intra-prediction slice; 4. The method of claim 3, further comprising: determining a maximum value of the first parameter based on a maximum hierarchical depth of coding units resulting from multi-type tree partitioning of quadtree leaves.

wherein the coded blocks are associated with inter-predicted slices, and the method comprises:
a size of a per-coding-tree luma coded treeblock associated with the inter-prediction slice, a minimum size of luma samples within a luma leaf block resulting from quadtree partitioning per the per-coding-tree associated with the inter-prediction slice; 4. The method of claim 3, further comprising: determining a maximum value of the first parameter based on a maximum hierarchical depth of coding units resulting from multi-type tree partitioning of quadtree leaves.

determining a luma QP value based on the delta QP value;
2. The method of claim 1, further comprising: determining a chroma QP value based on the chroma QP offset value; and processing the coded block based on the luma QP value and the chroma QP value.

A method of encoding a video sequence into a bitstream, the method comprising:
receiving a video sequence;
encoding one or more pictures of the video sequence; and
generate a bitstream
wherein said encoding comprises:
determining a first parameter of the coding block;
determining one or more second parameters associated with delta quantization parameter (QP) values or chroma QP offset values according to the first parameters;
determining at least one of the delta QP value or the chroma QP offset value according to the one or more second parameters;
A method, including

Determining the first parameter of the coded block comprises:
determining whether the coded block is associated with an intra-predicted slice or an inter-predicted slice; and
responsive to the coded block being associated with the intra-predicted slice, determining the first parameter to be a parameter associated with the intra-predicted slice; or
Determining the first parameter to be a parameter associated with the inter-predicted slice in response to the coded block being associated with the inter-predicted slice.
8. The method of claim 7, comprising:

8. The method of claim 7, wherein the first parameter is signaled in at least one of a slice header or picture header associated with the coded block.

wherein the coded block is associated with an intra-predicted slice, the method comprising:
a size of a per-coding-tree luma coded treeblock associated with said intra-prediction slice, a minimum size of luma samples within a luma leaf-block resulting from quadtree partitioning per said per-coding-tree, and 4 within said intra-prediction slice. Determining the maximum value of the first parameter based on the maximum hierarchical depth of coding units resulting from multi-type tree partitioning of branch tree leaves.
10. The method of claim 9, further comprising:

wherein the coded blocks are associated with inter-predicted slices, and the method comprises:
a size of a per-coding-tree luma coded treeblock associated with said inter-predicted slice, a minimum size of luma samples within a luma leaf block resulting from quadtree partitioning per said coded-tree, and 4 within said inter-predicted slice. Determining the maximum value of the first parameter based on the maximum hierarchical depth of coding units resulting from multi-type tree partitioning of branch tree leaves.
10. The method of claim 9, further comprising:

determining a luma QP value based on the delta QP value;
determining a chroma QP value based on the chroma QP offset value; and
processing the coded block based on the luma QP value and the chroma QP value;
8. The method of claim 7, further comprising:

A non-transitory computer-readable medium storing a video bitstream for processing according to a method, the method comprising:
determining a first parameter of the coding block;
determining one or more second parameters associated with delta quantization parameter (QP) values or chroma QP offset values according to the first parameters;
determining at least one of the delta QP value or the chroma QP offset value according to the one or more second parameters;
A non-transitory computer-readable medium, including

Determining the first parameter of the coded block comprises:
determining whether the coded block is associated with an intra-predicted slice or an inter-predicted slice; and
responsive to the coded block being associated with the intra-predicted slice, determining the first parameter to be a parameter associated with the intra-predicted slice; or
Determining the first parameter to be a parameter associated with the inter-predicted slice in response to the coded block being associated with the inter-predicted slice.
14. The non-transitory computer-readable medium of claim 13, comprising:

14. The non-transitory computer-readable medium of Claim 13, wherein the first parameter is signaled in at least one of a slice header or a picture header associated with the coded block.

wherein the coded block is associated with an intra-predicted slice, the method comprising:
a size of a per-coding-tree luma coded treeblock associated with said intra-prediction slice, a minimum size of luma samples within a luma leaf-block resulting from quadtree partitioning per-coding-tree associated with said intra-prediction slice, and 4 within said intra-prediction slice. Determining the maximum value of the first parameter based on the maximum hierarchical depth of coding units resulting from multi-type tree partitioning of branch tree leaves.
16. The non-transitory computer-readable medium of claim 15, further comprising:

wherein the coded blocks are associated with inter-predicted slices, and the method comprises:
a size of a per-coding-tree luma coded treeblock associated with said inter-predicted slice, a minimum size of luma samples within a luma leaf block resulting from quadtree partitioning per said coded-tree, and 4 within said inter-predicted slice. Determining the maximum value of the first parameter based on the maximum hierarchical depth of coding units resulting from multi-type tree partitioning of branch tree leaves.
16. The non-transitory computer-readable medium of claim 15, further comprising:

said method comprising:
determining a luma QP value based on the delta QP value;
determining a chroma QP value based on the chroma QP offset value; and
processing the coded block based on the luma QP value and the chroma QP value;
14. The non-transitory computer-readable medium of claim 13, further comprising: