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Quantization matrix encoding/decoding method and device, and recording medium in which bitstream is stored

A quantization matrix and encoding technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of objective image quality and subjective image quality limitations, and achieve the effect of improving subjective image quality and improving objective image quality

Pending Publication Date: 2021-08-06
ELECTRONICS & TELECOMM RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In traditional quantization matrix encoding / decoding, since only prediction mode, color component or size is considered, there are limitations in the objective image quality and subjective image quality of the image

Method used

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  • Quantization matrix encoding/decoding method and device, and recording medium in which bitstream is stored
  • Quantization matrix encoding/decoding method and device, and recording medium in which bitstream is stored
  • Quantization matrix encoding/decoding method and device, and recording medium in which bitstream is stored

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Embodiment Construction

[0056] Various modifications can be made to the invention, and there are various embodiments of the invention, examples of which will now be provided and described in detail with reference to the accompanying drawings. However, the present invention is not limited thereto although the exemplary embodiments can be construed as including all modifications, equivalents or substitutions within the technical idea and technical scope of the present invention. Like reference numerals refer to the same or similar functionality in various respects. In the drawings, the shapes and sizes of elements may be exaggerated for clarity. In the following detailed description of the invention, reference is made to the accompanying drawings which show, by way of illustration, specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure. It should be understood that the various emb...

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Abstract

An image encoding / decoding method and device are provided. The image decoding method according to the present invention comprises the steps of: decoding information about a quantization matrix from a bitstream; acquiring a quantization matrix of a current block on the basis of the information about the quantization matrix; and inversely quantizing the current block by using the quantization matrix of the current block, wherein the step of acquiring the quantization matrix of the current block comprises the steps of: deriving a single identifier by using at least one of size, prediction mode, and color component of the current block; and acquiring the quantization matrix of the current block on the basis of the single identifier.

Description

technical field [0001] The present invention relates to an image encoding / decoding method and device and a recording medium for storing bit streams. More particularly, the present invention relates to a method and apparatus for encoding / decoding an image based on a quantization matrix and a recording medium for storing a bitstream. Background technique [0002] Recently, demands for high-resolution and high-quality images such as high-definition (HD) or ultra-high-definition (UHD) images have increased in various applications. As the resolution and quality of images increase, the amount of data increases accordingly. This is one of the reasons for the increase in transmission cost and storage cost when image data is transmitted through an existing transmission medium such as a wired or wireless broadband channel or when image data is stored. In order to solve these problems of high-resolution and high-quality image data, efficient image encoding / decoding techniques are req...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/124H04N19/105H04N19/176H04N19/119H04N19/50H04N19/117H04N19/94H04N19/136H04N19/70H04N19/61
CPCH04N19/176H04N19/157H04N19/126H04N19/159H04N19/186H04N19/70H04N19/124H04N19/105H04N19/593H04N19/122H04N19/129H04N19/119H04N19/184H04N19/61H04N19/94H04N19/136
Inventor 林成昶姜晶媛李河贤李镇浩金晖容金旲衍
Owner ELECTRONICS & TELECOMM RES INST
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