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Inter prediction method and device in video coding syste

A technology of video decoding and decoding equipment, applied in the field of inter-frame prediction, which can solve the problems of increased transmission cost and storage cost, and achieve the effect of eliminating or reducing the amount of data, reducing the amount of information, and improving the overall compilation efficiency

Active Publication Date: 2018-04-17
LG ELECTRONICS INC
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Problems solved by technology

Therefore, when image data is transmitted using a medium such as a conventional wired / wireless broadband line or stored using an existing storage medium, its transmission cost and storage cost increase

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  • Inter prediction method and device in video coding syste
  • Inter prediction method and device in video coding syste
  • Inter prediction method and device in video coding syste

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Embodiment Construction

[0031] The present invention can be modified in various forms, and specific embodiments will be described and illustrated in the accompanying drawings. However, the examples are not intended to limit the invention. The terms used in the following description are used to describe specific embodiments only, but are not intended to limit the present invention. The representation of the singular includes the representation of the plural as long as it is clearly understood differently. Terms such as "comprising" and "having" are intended to indicate the presence of features, numbers, steps, operations, elements, components, or a combination thereof used in the following description, and, therefore, should be understood not to preclude the presence or addition of one or more Possibility of different features, numbers, steps, operations, elements, components or combinations thereof.

[0032] On the other hand, in order to facilitate the explanation of different specific functions i...

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Abstract

According to the present invention, a video decoding method performed by a decoding device comprises the steps of: deriving control points (CPs) for a current block; acquiring motion vectors for the CPs; deriving a sample-unit motion vector in the current block on the basis of the acquired motion vectors; deriving a prediction sample for the current block on the basis of the sample-unit motion vector; and generating a restoration sample on the basis of the prediction sample, wherein coordinates of a bottom-right sample position of the current block are (0, 0), and coordinates of CP0 among theCPs are (0, 0). According to the present invention, inter prediction can be effectively performed through sample-unit motion vectors even when an image in a current block is planarly moved and when the image is variously changed, and since motion vectors for CPs can be derived on the basis of already decoded neighboring blocks, a data amount for information on the motion vectors for the CPs and for a residual signal for the current block can be removed or reduced, and overall coding efficiency can be improved.

Description

technical field [0001] The present invention relates to a video coding technology, and more particularly, to an inter-frame prediction method and apparatus in a video coding system. Background technique [0002] Demands for high-resolution, high-quality images such as HD (High Definition) images and UHD (Ultra High Definition) images are increasing in various fields. Because image data has high resolution and high quality, the amount of information or bits to be transmitted increases relative to conventional image data. Therefore, when image data is transmitted using a medium such as a conventional wired / wireless broadband line or stored using an existing storage medium, its transmission cost and storage cost increase. [0003] Accordingly, there is a need for efficient image compression techniques for efficiently transmitting, storing, and reproducing information for high-resolution and high-quality images. SUMMARY OF THE INVENTION [0004] technical purpose [0005] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/105H04N19/176H04N19/503H04N19/517
CPCH04N19/105H04N19/503H04N19/176H04N19/517H04N19/182H04N19/159H04N19/44H04N19/513
Inventor 孙银庸具文模张炯文朴胜煜全勇俊
Owner LG ELECTRONICS INC
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