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Image decoding method using chroma quantization parameter table and apparatus therefor

A quantization parameter and image decoding technology, which is applied in the field of image compilation, can solve the problems of increased transmission cost and storage cost, and achieve the effect of improving compilation efficiency

Pending Publication Date: 2022-03-11
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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  • Image decoding method using chroma quantization parameter table and apparatus therefor
  • Image decoding method using chroma quantization parameter table and apparatus therefor
  • Image decoding method using chroma quantization parameter table and apparatus therefor

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Embodiment Construction

[0023] 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.

[0024] 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 comprises the steps of: acquiring a flag indicating whether a chroma quantization parameter table is applied to a chroma component; obtaining chroma quantization parameter data based on the flag; deriving a chroma quantization parameter table based on the chroma quantization parameter data; deriving a chroma quantization parameter for the chroma component based on a chroma quantization parameter table; deriving a residual sample for the chroma component based on the chroma quantization parameter; and generating a reconstructed picture based on the residual samples.

Description

technical field [0001] The present disclosure relates to image coding technology, and more particularly, to an image decoding method and apparatus for coding image information for deriving a chroma quantization parameter table for a chroma component in an image coding 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 h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/124H04N19/137H04N19/18H04N19/186H04N19/70
CPCH04N19/124H04N19/137H04N19/18H04N19/186H04N19/70H04N19/157H04N19/132H04N19/46
Inventor 塞特拉·帕卢瑞金昇焕赵杰
Owner LG ELECTRONICS INC