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Hierarchical entropy encoding and decoding
US9035807B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9035807-B2 |
| Application number | US-201114240066-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 25, 2011 |
| Priority date | Aug 25, 2011 |
| Publication date | May 19, 2015 |
| Grant date | May 19, 2015 |
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Abstract
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A particular implementation receives geometry data of a 3D mesh, and represents the geometry data with an octree. The particular implementation partitions the octree into three parts, wherein the symbols corresponding to the middle part of the octree are hierarchical entropy encoded. To partition the octree into three parts, different thresholds are used. Depending on whether a symbol associated with a node is an S1 symbol, the child node of the node is included in the middle part or the upper part of the octree. In hierarchical entropy encoding, a non-S1 symbol is first encoded as a pre-determined symbol ‘X’ using symbol set S2={S1, ‘X’} and the non-S1 symbol itself is then encoded using symbol set S0 (S2⊂S0), and an S1 symbol is encoded using symbol set S2. Another implementation defines corresponding hierarchical entropy decoding. A further implementation reconstructs the octree and restores the geometry data of a 3D mesh from the octree representation.
First claim
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The invention claimed is: 1. A method, comprising: determining that a symbol in a sequence of symbols does not belong to a first symbol set; encoding a pre-determined symbol to represent the determined symbol, using a statistical model for the first symbol set and the pre-determined symbol; and encoding the determined symbol, using a statistical model for a second symbol set. 2. The method of claim 1 , wherein the second symbol set is a superset of the f…
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- G06T17/005Primary
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
- H03M7/00Primary
Electricity · mapped topic
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Frequently asked questions
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- What does patent US9035807B2 cover?
- A particular implementation receives geometry data of a 3D mesh, and represents the geometry data with an octree. The particular implementation partitions the octree into three parts, wherein the symbols corresponding to the middle part of the octree are hierarchical entropy encoded. To partition the octree into three parts, different thresholds are used. Depending on whether a symbol associate…
- Who is the assignee on this patent?
- Jiang Wenfei, Cai Kangying, Hu Ping, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification G06T17/005. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 19 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).