Invention Grant
- Patent Title: Adaptive control point selection for affine motion model based video coding
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Application No.: US17256769Application Date: 2019-06-27
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Publication No.: US11503328B2Publication Date: 2022-11-15
- Inventor: Yuwen He , Xiaoyu Xiu , Yan Ye , Philippe Hanhart
- Applicant: Vid Scale, Inc.
- Applicant Address: US DE Wilmington
- Assignee: Vid Scale, Inc.
- Current Assignee: Vid Scale, Inc.
- Current Assignee Address: US DE Wilmington
- Agency: Condo Roccia Koptiw LLP
- International Application: PCT/US2019/039611 WO 20190627
- International Announcement: WO2020/006304 WO 20200102
- Main IPC: H04N19/00
- IPC: H04N19/00 ; H04N19/52 ; H04N19/54

Abstract:
Systems, methods, and instrumentalities are disclosed for motion vector clipping when affine motion mode is enabled for a video block. A video coding device may determine that an affine mode for a video block is enabled. The video coding device may determine a plurality of control point affine motion vectors associated with the video block. The video coding device may store the plurality of clipped control point affine motion vectors for motion vector prediction of a neighboring control point affine motion vector. The video coding device may derive a sub-block motion vector associated with a sub-block of the video block, clip the derived sub-block motion vector, and store it for spatial motion vector prediction or temporal motion vector prediction. For example, the video coding device may clip the derived sub-block motion vector based on a motion field range that may be based on a bit depth value.
Public/Granted literature
- US20210274209A1 ADAPTIVE CONTROL POINT SELECTION FOR AFFINE MOTION MODEL BASED VIDEO CODING Public/Granted day:2021-09-02
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