- Patent Title: Control-point based intra direction representation for intra coding
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Application No.: US16097115Application Date: 2017-05-04
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Publication No.: US10939096B2Publication Date: 2021-03-02
- Inventor: Xiaoyu Xiu , Yuwen He , Yan Ye
- Applicant: Interdigital Madison Patent Holdings, SAS
- Applicant Address: FR Paris
- Assignee: Interdigital Madison Patent Holdings, SAS
- Current Assignee: Interdigital Madison Patent Holdings, SAS
- Current Assignee Address: FR Paris
- Agency: Invention Mine LLC
- International Application: PCT/US2017/031133 WO 20170504
- International Announcement: WO2017/192898 WO 20171109
- Main IPC: H04N19/105
- IPC: H04N19/105 ; H04N19/593 ; H04N19/182 ; H04N19/176 ; H04N19/147 ; H04N19/11 ; H04N19/463 ; H04N19/59

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.
Public/Granted literature
- US20190104303A1 CONTROL-POINT BASED INTRA DIRECTION REPRESENTATION FOR INTRA CODING Public/Granted day:2019-04-04
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