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Bdpcm-based image decoding method and device for same

A technology of image decoding and decoding devices, which is applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of increased transmission cost and storage cost, and achieve the effect of improving the overall image compilation efficiency

Pending Publication Date: 2022-01-28
LG ELECTRONICS INC
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  • Summary
  • 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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  • Bdpcm-based image decoding method and device for same
  • Bdpcm-based image decoding method and device for same
  • Bdpcm-based image decoding method and device for same

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Embodiment Construction

[0026] 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, and thus it should be understood as not excluding the presence or addition of one or more The possibility of a different feature, number, step, operation, element, component or combination thereof.

[0027] Furthermore, elements in the drawings described in this disclosure are independently drawn for the convenience of explai...

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Abstract

An image decoding method performed by a decoding device according to the present document is characterized by including: a step for determining whether the width and height of the current block are smaller than or equal to a maximum transform block size; a step for acquiring a Block-based Delta Pulse Code Modulation (BDPCM) flag, which indicates whether to apply BDPCM to the current block, when the width and height are smaller than or equal to the maximum transform block size; a step for acquiring a BDPCM direction flag that indicates a prediction direction for the current block on the basis of the BDPCM flag; a step for deriving prediction samples of the current block on the basis of an intra-prediction mode derived on the basis of the BDPCM direction flag; and a step for deriving recovered samples of the current block on the basis of the prediction samples.

Description

technical field [0001] The present disclosure relates to image coding technology, and more particularly, to an image decoding method and device for executing BDPCM in an image coding system to code a current block. 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 invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/11H04N19/13H04N19/132H04N19/157H04N19/18H04N19/597H04N19/70
CPCH04N19/13H04N19/18H04N19/597H04N19/11H04N19/132H04N19/157H04N19/70H04N19/176H04N19/593H04N19/105H04N19/159H04N19/46
Inventor 柳先美南廷学崔情娥
Owner LG ELECTRONICS INC