Image decoding method, image decoding device, image encoding method, and image encoding device for quantization shift
WO2025041998A1PCT designated stage expired Publication Date: 2025-02-27SAMSUNG ELECTRONICS CO LTD
Patent Information
- Application Number
- PCT/KR2024/008342
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-05-21
- Filing Date
- 2024-06-17
- Publication Date
- 2025-02-27
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Figure KR2024008342_27022025_PF_FP_ABST
Abstract
In one embodiment, an image decoding method for quantization shift is provided. The image decoding method may comprise a step of acquiring, from a bitstream, information indicating a quantization parameter for a current block. The image decoding method may comprise a step of acquiring a transform coefficient of the current block by performing inverse quantization on the basis of the information indicating the quantization parameter. The image decoding method may comprise a step of determining one quantization offset among a plurality of quantization offsets on the basis of at least one of a prediction mode of the current block, a frequency band of the current block, and a quantization parameter of the current block. The image decoding method may comprise a step of changing a transform coefficient by using the determined quantization offset.
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Citation Information
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