Title:
SIGNALING OF MOTION VECTOR DIFFERENCE DERIVATION
Document Type and Number:
WIPO Patent Application WO/2020/233702
Kind Code:
A1
Abstract:
A video decoder receives data for a block of pixels to be decoded as a current block of a current picture of a video. When the current block is coded by using inter mode and bi-directional prediction, the video decoder receives a first motion vector difference and determines a second motion vector difference based on a first flag or a second flag. When the first flag is false, the video decoder uses the second flag to determine whether to set the second motion vector difference to be at an opposite value of the first motion vector difference. When the first flag is true, the video decoder sets the second motion vector difference to be zero. The video decoder reconstructs the current block by using motion information based on the first motion vector difference and the second motion vector difference to perform inter prediction.
Inventors:
CHIANG MAN-SHU (CN)
HSU CHIH-WEI (CN)
CHUANG TZU-DER (CN)
HSU CHIH-WEI (CN)
CHUANG TZU-DER (CN)
Application Number:
PCT/CN2020/091790
Publication Date:
November 26, 2020
Filing Date:
May 22, 2020
Export Citation:
Assignee:
MEDIATEK INC (CN)
International Classes:
H04N19/573
Foreign References:
| US20140192885A1 | 2014-07-10 | |||
| US20190007699A1 | 2019-01-03 |
Other References:
INTERDIGITAL COMMUNICATIONS， INC.: "CE4-related: Simplified symmetric MVD based on CE4.4.3", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 13TH MEETING: MARRAKECH， MA， 9–18 JAN. 2019, 18 January 2019 (2019-01-18), XP030202235
HUAWEI TECHNOLOGIES. CO.， LTD.: "CE4: Symmetrical MVD mode (Test 4.5.1)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 12TH MEETING: MACAO， CN， 3–12 OCT. 2018, 12 October 2018 (2018-10-12), XP030191100
See also references of EP 3970375A4
HUAWEI TECHNOLOGIES. CO.， LTD.: "CE4: Symmetrical MVD mode (Test 4.5.1)", JOINT VIDEO EXPERTS TEAM (JVET) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11 12TH MEETING: MACAO， CN， 3–12 OCT. 2018, 12 October 2018 (2018-10-12), XP030191100
See also references of EP 3970375A4
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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