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Image decoding method using BDPCM and apparatus therefor

A technology of image decoding and image coding, which is applied in the field of image decoding, can solve the problems of increased transmission cost and storage cost, and achieve the effect of improving the accuracy of intra-frame prediction and improving the coding efficiency

Pending Publication Date: 2022-03-11
LG ELECTRONICS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, when image data is transmitted using a medium such as a conventional wired / wireless broadband line or stored using an existing storage medium, its transmission cost and storage cost increase

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  • Image decoding method using BDPCM and apparatus therefor
  • Image decoding method using BDPCM and apparatus therefor
  • Image decoding method using BDPCM and apparatus therefor

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Embodiment Construction

[0029] The present disclosure can be modified in various forms, and specific embodiments thereof will be described and illustrated in the drawings. However, the embodiments are not intended to limit the present disclosure. Terms used in the following description are for describing specific embodiments only, and are not intended to limit the present disclosure. A singular expression includes a plural expression as long as it is 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 following description, so it should be understood that the presence or addition of one or more Possibility of different features, quantities, steps, operations, elements, components or combinations thereof.

[0030] In addition, elements in the drawings described in this disclosure are independently drawn for the convenience of explaining different...

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Abstract

An image decoding method performed by a decoding device according to the present document comprises the steps of: deriving prediction samples of a first sample and a second sample of a current block on the basis of BDPCM-related information on the current block and neighboring samples of the current block; deriving a residual sample of the first sample and the second sample based on the residual coefficient of the first sample and the modified residual coefficient of the second sample; and storing, as the intra prediction mode of the current block, an intra prediction mode in the prediction direction of the current block derived on the basis of the BDPCM direction flag.

Description

technical field [0001] The present disclosure relates to image encoding technology, and more particularly, to an image decoding method and device for encoding image information by executing BDPCM in an image encoding system. Background technique [0002] Recently, in various fields, demands for high-resolution, high-quality images such as HD (High Definition) images and UHD (Ultra High Definition) images are increasing. Because image data has high resolution and high quality, the amount of information or bits to be transmitted increases relative to conventional image data. Therefore, when image data is transmitted using a medium such as a conventional wired / wireless broadband line or stored using an existing storage medium, its transmission cost and storage cost increase. [0003] Therefore, a high-efficiency image compression technique for efficiently transmitting, storing, and reproducing information of high-resolution high-quality images is required. Contents of the in...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/593H04N19/91H04N19/176
CPCH04N19/593H04N19/91H04N19/176H04N19/70H04N19/11H04N19/159H04N19/105H04N19/132
Inventor 柳先美南廷学崔情娥
Owner LG ELECTRONICS INC