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Method and apparatus for transform-based image encoding/decoding

A coding and equipment technology, applied in the field of transformation-based image coding/decoding and equipment, can solve problems such as cost increase, and achieve the effect of improving transformation efficiency and coding/decoding efficiency

Active Publication Date: 2019-03-01
ELECTRONICS & TELECOMM RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when image data is transmitted by using a medium such as a conventional wired broadband network and a wireless broadband network, or when image data is stored by using a conventional storage medium, the cost of transmission and storage increases

Method used

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  • Method and apparatus for transform-based image encoding/decoding
  • Method and apparatus for transform-based image encoding/decoding
  • Method and apparatus for transform-based image encoding/decoding

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Embodiment Construction

[0060] 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 to include all modifications, equivalents or replacements within the technical idea and technical scope of the present invention. Like reference numerals refer to identical or similar functions 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 that 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 embodiment...

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Abstract

The present invention relates to a method and an apparatus for transform-based image encoding / decoding. The image decoding method according to the present invention comprises: a step of determining atransform mode of a current block; a step of inversely transforming residual data of the current block according to the transform mode of the current block; and a step of rearranging the residual dataof the current block inversely transformed according to the transform mode of the current block, wherein the transform mode may include at least one of a shuffling discrete sine transform (SDST), a shuffling discrete cosine transform (SDCT), a discrete sine transform (DST) and a discrete cosine transform (DCT).

Description

technical field [0001] The invention relates to a method and a device for encoding and decoding images. More specifically, the present invention relates to a method and apparatus for transform-based encoding and decoding of video images. Background technique [0002] Recently, demands for high-resolution and high-quality images such as high-definition (HD) images and ultra-high-definition (UHD) images have increased in various application fields. However, the data volume of image data of higher resolution and quality has increased compared with conventional image data. Therefore, when image data is transmitted by using a medium such as a conventional wired broadband network and a wireless broadband network, or when image data is stored by using a conventional storage medium, the cost of transmission and storage increases. In order to solve these problems that arise as the resolution and quality of image data increase, high-efficiency image encoding / decoding techniques are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/61H04N19/625H04N19/103H04N19/122H04N19/70H04N19/186H04N19/90H04N19/176H04N19/132H04N19/107
CPCH04N19/186H04N19/176H04N19/625H04N19/103H04N19/122H04N19/61H04N19/90H04N19/107H04N19/132H04N19/70H04N19/12H04N19/159H04N19/96H04N19/597H04N19/146H04N19/513H04N19/18
Inventor 林成昶姜晶媛高玄硕李镇浩李河贤全东山赵承眩金晖容崔振秀李英烈金南煜崔俊优
Owner ELECTRONICS & TELECOMM RES INST
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