Title:
METHOD AND APPARATUS OF SAMPLE CLIPPING FOR PREDICTION REFINEMENT WITH OPTICAL FLOW IN VIDEO CODING
Document Type and Number:
WIPO Patent Application WO/2021/052510
Kind Code:
A1
Abstract:
Methods and apparatus of video coding using sub-block based affine mode are disclosed. According to this method, control-point motion vectors (MVs) associated with the affine mode are determined for a block. A sub-block MV is derived for a target sub-block of the block from the control-point MVs for the block. A prediction offset is determined for a target pixel of the target sub-block using information comprising a pixel MV offset from the sub-block MV for the target pixel according to Prediction Refinement with Optical Flow (PROF). The target pixel of the target sub-block is encoded or decoded using a modified predictor. The modified prediction is generated by clipping the prediction offset to a target range and combining the clipped prediction offset with an original predictor.
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Inventors:
CHUANG TZU-DER (CN)
CHEN CHING-YEH (CN)
LIN ZHI-YI (CN)
CHEN CHING-YEH (CN)
LIN ZHI-YI (CN)
Application Number:
PCT/CN2020/116712
Publication Date:
March 25, 2021
Filing Date:
September 22, 2020
Export Citation:
Assignee:
MEDIATEK INC (CN)
International Classes:
H04N17/00
Foreign References:
| CN101277419A | 2008-10-01 | |||
| US20040042651A1 | 2004-03-04 |
Other References:
JIANCONG DANIEL LUO , YUWEN HE: "CE2-related: Prediction refinement with optical flow for affine mode", THE JOINT VIDEO EXPLORATION TEAM OF ISO/IEC JTC1/SC29/WG11 AND ITU-T SG.16, no. JVET-N0236, 27 March 2019 (2019-03-27), pages 1 - 7, XP030202914
BENJAMIN BROSS , JIANLE CHEN , SHAN LIU: "Versatile Video Coding (Draft 6)", 127. MPEG MEETING; 20190708 - 20190712; GOTHENBURG; (MOTION PICTURE EXPERT GROUP OR ISO/IEC JTC1/SC29/WG11), no. JVET-O2001-v1, 13 July 2019 (2019-07-13), pages 1 - 406, XP030208555
See also references of EP 4029244A4
BENJAMIN BROSS , JIANLE CHEN , SHAN LIU: "Versatile Video Coding (Draft 6)", 127. MPEG MEETING; 20190708 - 20190712; GOTHENBURG; (MOTION PICTURE EXPERT GROUP OR ISO/IEC JTC1/SC29/WG11), no. JVET-O2001-v1, 13 July 2019 (2019-07-13), pages 1 - 406, XP030208555
See also references of EP 4029244A4
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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