Simplified non-square quadtree transforms for video coding
US-9912944-B2 · Mar 6, 2018 · US
Encoding and decoding methods and corresponding devices
US12401793B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12401793-B2 |
| Application number | US-202318521946-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 28, 2023 |
| Priority date | Oct 5, 2016 |
| Publication date | Aug 26, 2025 |
| Grant date | Aug 26, 2025 |
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Abstract
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A decoding method for decoding a block of an image is disclosed that comprises: determining a split mode for said block in a set of split modes; splitting said block into at least two sub-blocks responsive to said split mode; decoding each of the at least two sub-blocks; wherein said set of split modes comprises at least one split mode for asymmetrically splitting said block into the at least two sub-blocks.
First claim
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The invention claimed is: 1. A decoding device comprising one or more processors configured for: determining, based on a property of a block, a context for decoding a syntax element signaled in video data specifying a position of a split in the block; and context-based arithmetic decoding the syntax element responsive to the context, wherein the property of the block is one of: a frontier in a neighboring block of the block is aligned with a frontier resulting from asymmetrically splitting the block; a frontier in a neighboring block located on a left side of the block is aligned with a frontier resulting from asymmetrically splitting the block horizontally; and a frontier in a neighboring block located on top of the block is aligned with a frontier resulting from asymmetrically splitting the block vertically; or is based on a size of a first neighboring block of the block relative to a size of a second neighboring block of the block, the size being a width or a height; or is based on a size of a neighboring block relative to a size of the block, the size being a width or a height. 2. The decoding device according to claim 1 , wherein the property of the block is further based on a quad-tree plus binary tree depth value associated with the block. 3. The decoding device according to claim 1 , wherein the property of the block is further based on a shape of the block. 4. An encoding device comprising one or more processors configured for: determining, based on a property of a block, a context for encoding a syntax element to be signaled in video data specifying a position of a split in the block; and context-based arithmetic encoding the syntax element responsive to the context, wherein the property of the block is one of: a frontier in a neighboring block of the block is aligned with a frontier resulting from asymmetrically splitting the block; a frontier in a neighboring block located on a left side of the block is aligned with a frontier resulting from asymmetrically splitting the block horizontally; and a frontier in a neighboring block located on top of the block is aligned with a frontier resulting from asymmetrically splitting the block vertically; or is based on a size of a first neighboring block of the block relative to a size of a second neighboring block of the block, the size being a width or a height; or is based on a size of a neighboring block relative to a size of the block, the size being a width or a height. 5. The encoding device of claim 4 , wherein the property of the block is further based on quad-tree plus binary tree depth value associated with the block; or, is based on a shape of the block. 6. A decoding method comprising: determining, based on a property of a block, a context for decoding a syntax element signaled in video data specifying a position of a split in the block; and context-based arithmetic decoding the syntax element responsive to the context; wherein the property of the block is one of: a frontier in a neighboring block of the block is aligned with a frontier resulting from asymmetrically splitting the block; a frontier in a neighboring block located on a left side of the block is aligned with a frontier resulting from asymmetrically splitting the block horizontally; and a frontier in a neighboring block located on top of the block is aligned with a frontier resulting from asymmetrically splitting the block vertically; or is based on a size of a first neighboring block of the block relative to a size of a second neighboring block of the block, the size being a width or a height; or is based on a size of a neighboring block relative to a size of the block, the size being a width or a height. 7. The decoding method according to claim 6 , wherein the property of the block is further based on a quad-tree plus binary tree depth value associated with the block. 8. The decoding method according to claim 6 , wherein the property of the block is further based on a shape of the block. 9. An encoding method comprising: determining, based on a property of a block, a context for encoding a syntax element in video data specifying a position of a split in the block; and context-based arithmetic encoding the syntax element responsive to the context, wherein the property of the block is one of: a frontier in a neighboring block of the block is aligned with a frontier resulting from asymmetrically splitting the block; a frontier in a neighboring block located on a left side of the block is aligned with a frontier resulting from asymmetrically splitting the block horizontally; and a frontier in a neighboring block located on top of the block is aligned with a frontier resulting from asymmetrically splitting the block vertically; or is based on a size of a first neighboring block of the block relative to a size of a second neighboring block of the block, the size being a width or a height; or is based on a size of a neighboring block relative to a size of the block, the size being a width or a height.
Assignees
Inventors
Classifications
Incoming video signal characteristics or properties · CPC title
Entropy coding, e.g. variable length coding [VLC] or arithmetic coding · CPC title
Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC] · CPC title
the region being a block, e.g. a macroblock · CPC title
characterised by syntax aspects related to video coding, e.g. related to compression standards · CPC title
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Frequently asked questions
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- What does patent US12401793B2 cover?
- A decoding method for decoding a block of an image is disclosed that comprises: determining a split mode for said block in a set of split modes; splitting said block into at least two sub-blocks responsive to said split mode; decoding each of the at least two sub-blocks; wherein said set of split modes comprises at least one split mode for asymmetrically splitting said block into the at least t…
- Who is the assignee on this patent?
- Interdigital Madison Patent Holdings Sas
- What technology area does this patent fall under?
- Primary CPC classification H04N19/119. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Aug 26 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).