Image encoding/decoding method and device for performing prediction, and method for transmitting bitstream involving weighted prediction and bi-directional optical flow
US12348754B2 · kind B2 · utility
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Key dates
| Filing date | Sep 5, 2023 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Sep 5, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/70
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure is performed by an image decoding apparatus. The image decoding method comprises deriving a first flag specifying whether to perform weighted prediction on a current block and a weight index BcwIdx of bi-prediction with CU-level weight (BCW) for the current block, determining whether to perform default weighted prediction or explicit weighted prediction on the current block based on the first flag and BcwIdx, and generating a prediction block for the current block by performing the determined method.
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