Image decoding method and apparatus
The image decoding method optimizes chroma quantization by using separate parameters for Cb and Cr components, addressing high-resolution image efficiency challenges and reducing transmission and storage costs.
JP7866093B2Active Publication Date: 2026-05-26LG ELECTRONICS INC
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- LG ELECTRONICS INC
- Filing Date
- 2025-02-20
- Publication Date
- 2026-05-26
AI Technical Summary
Technical Problem
The increasing demand for high-resolution, high-quality images leads to higher transmission and storage costs due to the increased amount of information, necessitating improved image coding efficiency, particularly for chroma quantization parameters.
Method used
An image decoding method and apparatus that determines a chroma quantization parameter table based on a flag, allowing separate quantization parameters for Cb and Cr components, enhancing coding efficiency by adapting to image characteristics.
Benefits of technology
Improves coding efficiency by allowing flexible determination of chroma quantization parameters, reducing transmission and storage costs for high-resolution images.
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Smart Images
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Abstract
To provide image decoding method and device for coding image information including chroma quantization parameter data for deriving a chroma quantization parameter table for a chroma component.SOLUTION: An image decoding method includes obtaining a flag indicating whether one chroma quantization parameter table is applied to a chroma component and image information such as chroma quantization parameter data on the basis of the flag, and generating a reconstructed picture on the basis of the image information. When the value of the flag is 0, the chroma quantization parameter data includes first chroma quantization parameter data for a Cb component and second chroma quantization parameter data for a Cr component.SELECTED DRAWING: Figure 12
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