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Image coding method based on multiple transform selection and device therefor

An image decoding and inverse transform technology, applied in the field of video coding, can solve the problems of increased transmission cost and storage cost, and achieve the effect of improving the overall compression efficiency, reducing the amount of data, and improving the efficiency of residual coding

Pending Publication Date: 2021-05-04
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, if image data is transmitted using a medium such as an existing wired or wireless broadband line or image and video data is stored using an existing storage medium, transmission costs and storage costs increase

Method used

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  • Image coding method based on multiple transform selection and device therefor
  • Image coding method based on multiple transform selection and device therefor
  • Image coding method based on multiple transform selection and device therefor

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Embodiment Construction

[0029] This document can be modified in various ways and can have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit this document to particular implementations. Terms generally used in this specification are used to describe specific embodiments, and are not used to limit the technical spirit of this document. A singular expression includes a plural expression unless otherwise clearly stated in context. Terms such as "comprising" or "having" in this specification should be understood as indicating the presence of features, numbers, steps, operations, elements, components or combinations thereof described in this specification, without excluding the presence or addition of one or more Possibility of multiple properties, numbers, steps, operations, elements, components or combinations thereof.

[0030] Furthermore, elements in the drawings described in this document are independentl...

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Abstract

An image decoding method according to the present invention comprises the steps of: deriving quantized transform coefficients for a current block from a bitstream; deriving transform coefficients by performing inverse quantization on the basis of the quantized transform coefficients; deriving residual samples for the current block by performing inverse transform on the basis of the transform coefficients; and generating a reconstructed picture on the basis of the residual samples, wherein the inverse transform comprises acquiring information relating to multiple transform selection (MTS) from the bitstream, and is performed using a transform kernel set derived on the basis of the information relating to the MTS.

Description

technical field [0001] The present disclosure relates to a video coding technology, and more particularly, to a video coding method based on multiple transform selection in a video coding system and a device thereof. Background technique [0002] Demands for high-resolution and high-quality images and videos such as ultra-high-definition (HUD) images and 4K or 8K or larger videos are increasing recently in various fields. As image and video data become high resolution and high quality, the relative amount of transmitted information or the number of bits increases compared with existing image and video data. Therefore, if image data is transmitted using a medium such as an existing wired or wireless broadband line or image and video data is stored using an existing storage medium, transmission costs and storage costs increase. [0003] Furthermore, there has recently been increasing interest and demand for immersive media such as virtual reality (VR), artificial reality (AR)...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/12H04N19/61H04N19/124H04N19/132H04N19/184H04N19/70
CPCH04N19/70H04N19/184H04N19/61H04N19/132H04N19/124H04N19/12H04N19/18H04N19/157H04N19/159H04N19/176H04N19/46H04N19/625
Inventor M·萨勒海法尔金昇焕具文模林宰显
Owner LG ELECTRONICS INC
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