Intra prediction method and apparatus in image coding system
US10721479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2017 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Aug 31, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The intra prediction method according to the present invention comprises the steps of: deriving an intra prediction mode of a current block; deriving neighboring reference samples of the current block; and generating a prediction sample of the current block on the basis of linear interpolation of a first neighboring reference sample positioned in the prediction direction of the intra prediction mode, and a second neighboring reference sample positioned in the opposite direction of the prediction direction, among the neighboring reference samples of the current block, wherein the neighboring reference samples include left neighboring reference samples, left upper neighboring reference samples, upper neighboring reference samples, right neighboring reference samples, right lower neighboring reference samples, and lower neighboring reference samples of the current block. The present invention can improve intra prediction performance, and thereby reduce the amount of data required for residual information and increase the overall coding efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.