Control-point based intra direction representation for intra coding
US10939096B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2017 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Jun 29, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/593
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods are described for control-point based intra mode for coding a video bitstream. In an exemplary embodiment, at least two control points in a picture are selected. The control points may be, for example, points at or adjacent to two or more corners of a current block. For each of the control points, an associated intra prediction direction is identified. The intra prediction directions may be encoded in the bitstream, e.g. using differential coding. A derived intra prediction direction is interpolated based on a position of a pixel (or of a block) relative to the control points, and the derived intra prediction direction is used to predict one or more samples in the video. Different interpolation techniques, such as triangular interpolation or bilinear interpolation may be used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.