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Image data coding and decoding methods and devices

A technology of image data and decoding method, which is applied in the field of image processing, can solve the problem of high coding complexity, and achieve the effect of speeding up decoding, reducing complexity, and reducing complexity

Active Publication Date: 2019-01-04
HUAWEI TECH CO LTD
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Problems solved by technology

[0005] The embodiment of the present application provides a method and device for encoding and decoding image data, which can solve the current problem of high encoding complexity

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  • Image data coding and decoding methods and devices
  • Image data coding and decoding methods and devices
  • Image data coding and decoding methods and devices

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Embodiment Construction

[0057] The terms "first", "second", "third" and "fourth" in the specification and claims of the present application and the above drawings are used to distinguish different objects, rather than to limit a specific order.

[0058]In the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

[0059] In order to facilitate understanding of the embodiment of the present application, relevant elements involved in the embodiment of the present application are firstly introduced here.

[0060] Coding Tree Unit (CTU): An image is composed of multiple CTUs, ...

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Abstract

The embodiment of the invention discloses image data coding and decoding methods and devices, which relate to the field of image processing and solve the problem of high coding complexity. The image data decoding method particularly comprises steps: a code stream containing image data is obtained; the code stream is parsed to obtain node partition mode information of a first-level coding tree; thecode stream is parsed to obtain node partition mode information of a second-level coding tree; if the node partition mode information of the second-level coding tree indicates that the partition modecorresponding to a first node in the second-level coding tree is ternary tree partition, the code stream is parsed to obtain the coding information of three sub nodes in the first node, wherein one sub node in the first node is corresponding to a coding unit; and according to the coding information of the three sub nodes in the first node, the coding unit is decoded and rebuilt to obtain an imagecorresponding to the image data.

Description

technical field [0001] The embodiments of the present application relate to the field of image processing, and in particular, to a method and device for encoding and decoding image data. Background technique [0002] The video codec standard H.265 divides a frame of image into non-overlapping coding tree units (Coding TreeUnit, CTU), and uses each CTU as the root node of the quad-tree (Quad-Tree, QT), according to the QT structure Each CTU is recursively divided into several leaf nodes. Each node in the QT structure corresponds to an image region. If a certain node is no longer divided, the node is called a leaf node, and its corresponding image area forms a coding unit (Coding Unit, CU). Therefore, it can be considered that H.265 is a process of dividing a CTU into a group of CUs. The method of dividing a CTU into a group of CUs corresponds to a coding tree. [0003] The Joint Exploration team on Future Video Coding (JVET) proposed a QTBT division method with reference ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/176H04N19/44H04N19/70H04N19/96
CPCH04N19/176H04N19/44H04N19/70H04N19/96
Inventor 赵寅杨海涛刘杉
Owner HUAWEI TECH CO LTD
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