Image encoding/decoding method and apparatus

A technology of image decoding and image encoding, applied in the field of image encoding/decoding and equipment, to achieve the effect of reducing encoding complexity, improving subjective image quality, and improving image encoding and decoding efficiency

CN113841399APending Publication Date: 2021-12-24ELECTRONICS & TELECOMM RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-12-24

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Abstract

Provided are an image encoding / decoding method and apparatus. The image decoding method of the present disclosure may comprise the steps of: acquiring maximum transform block size information; deriving a maximum transform block size on the basis of the maximum transform block size information; and on the basis of the maximum transform block size, and the horizontal size and the vertical size of a current block, determining whether or not a secondary inverse transform is to be applied to the current block.
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Description

technical field

[0001] The present invention relates to methods and devices for image encoding / decoding and recording media for storing bitstreams. More specifically, the present invention relates to methods of transforming and quantizing residual signals and methods and devices for entropy coding / decoding of transform coefficients. 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 increases, 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 r...

Examples

Embodiment Construction

[0055] The same constituent elements in the drawings are denoted by the same reference numerals, and repeated description of the same elements will be omitted.

[0056] Hereinafter, an image may refer to a picture constituting a video, or may refer to the video itself. For example, "encoding or decoding or both encoding and decoding an image" may mean "encoding or decoding or both encoding and decoding a moving picture" and may mean "encoding or decoding one of the images of a moving picture encode or decode or both".

[0057] Hereinafter, the terms "moving picture" and "video" may be used as the same meaning and may be substituted for each other.

[0058] Hereinafter, the target image may be an encoding target image as an encoding target and / or a decoding target image as a decoding target. In addition, the target image may be an input image input to the encoding device, and an input image input to the decoding device. Here, the target image may have the same meaning as the...