Video or image coding method and device therefor

An image information and image decoding technology, applied in the field of video or image coding and its devices, can solve the problems of easy increase in transmission and storage costs, and achieve the effects of improving subjective/objective visual quality, improving compression performance, and improving compression efficiency

Pending Publication Date: 2021-12-10
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if image/video data is transmitted via a medium such as an existing wired/wireless broadband

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  • Video or image coding method and device therefor
  • Video or image coding method and device therefor
  • Video or image coding method and device therefor

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[0050] The disclosure of this document may be modified in various forms, and specific examples thereof will be described and illustrated in the accompanying drawings. However, the examples are not intended to limit the present disclosure. The terms used in this document are used to describe specific embodiments only, and are not intended to limit the embodiments of this document. The expression in the singular includes the expression in the plural, as long as it is not clearly understood differently. Terms such as "comprising" and "having" are intended to indicate the presence of features, numbers, steps, operations, elements, components, or combinations thereof used in the document, and it should therefore be understood that the presence or addition of one or more different features, Possibilities of numbers, steps, operations, elements, components, or combinations thereof.

[0051] In addition, each configuration of the drawings described in this document is an independent...

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Abstract

According to the disclosure of the present document, an image decoding method performed by a decoding device comprises the steps: acquiring, through a bitstream, image information including prediction mode information and residual information; deriving a prediction mode of a current block on the basis of the prediction mode information; deriving prediction samples on the basis of the prediction mode; deriving residual samples on the basis of the residual information; generating reconstruction samples on the basis of the prediction samples and the residual samples; deriving filter coefficients for an adaptive loop filter (ALF) procedure for the reconstruction samples; and generating modified reconstruction samples on the basis of the reconstruction samples and the filter coefficients, wherein the image information includes a first adaptation parameter set (APS) including an ALF data field, and the ALF data field includes ALF parameters used to derive the filter coefficients.

Description

technical field [0001] The present disclosure relates to a video or image compiling method and device thereof. Background technique [0002] Recently, demands for high-resolution, high-quality images / videos such as 4K or 8K ultra-high-definition (UHD) images / videos are increasing in various fields. As image / video resolution or quality becomes higher, relatively more information or bits are sent compared to traditional image / video data. Therefore, if image / video data is transmitted via a medium such as an existing wired / wireless broadband line or stored in a conventional storage medium, the cost of transmission and storage tends to increase. [0003] In addition, there is growing interest in and demand for virtual reality (VR) and artificial reality (AR) content, as well as immersive media such as holograms; and images / videos that exhibit image / video characteristics that differ from actual images / videos (e.g. , game images / videos) are also increasingly broadcast. [0004] ...

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Application Information

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IPC IPC(8): H04N19/117H04N19/70H04N19/109H04N19/503
CPCH04N19/117H04N19/109H04N19/70H04N19/176H04N19/186H04N19/105H04N19/11H04N19/159H04N19/132H04N19/503H04N19/1887H04N19/82
Inventor 塞特拉·帕卢瑞赵杰金昇焕林宰显
Owner LG ELECTRONICS INC
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