Title:
METHOD AND APPARATUS OF MOTION COMPENSATION BASED ON BI-DIRECTIONAL OPTICAL FLOW TECHNIQUES FOR VIDEO CODING
Document Type and Number:
WIPO Patent Application WO/2017/133661
Kind Code:
A1
Abstract:
Methods and apparatus of motion compensation using the bi-directional optical flow (BIO) techniques are disclosed. According to one method of the present invention, the BIO process is applied to encode or decode bi-directional current block in Merge mode only or in AMVP (advanced motion vector prediction) mode only. According to another method, the BIO process conditionally to encode or decode the current block depending on a jointly-coded flag if the current block is coded using a bi-prediction mode. According to yet another method, x-offset value vx and y-offset value vy for the current block are added to the current motion vector to form a final motion vector. The final motion vector is then used as a reference motion vector for following blocks. In still yet another method, the BIO process is applied to the chroma component.
Inventors:
CHEN CHING-YEH (CN)
CHUANG TZU-DER (CN)
HUANG YU-WEN (CN)
CHUANG TZU-DER (CN)
HUANG YU-WEN (CN)
Application Number:
PCT/CN2017/072826
Publication Date:
August 10, 2017
Filing Date:
February 03, 2017
Export Citation:
Assignee:
MEDIATEK INC (CN)
International Classes:
H04N19/51
Foreign References:
| CN102934444A | 2013-02-13 | |||
| CN101330609A | 2008-12-24 |
Other References:
E. ALSHINA ET AL.: "Bi-directional optical flow", JCTVC-C204, 15 October 2010 (2010-10-15), XP055324095
E. ALSHINA ET AL.: "Bi-directional optical flow", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, 3RD MEETING: GUANGZHOU, CN, 7 October 2010 (2010-10-07)
E. ALSHINA ET AL.: "Known tools performance investigation for next generation video coding", ITU-T SG 16 QUESTION 6, VIDEO CODING EXPERTS GROUP (VCEG), 52ND MEETING, 19 June 2015 (2015-06-19)
E. ALSHINA ET AL.: "Bi-directional optical flow", JOINT COLLABORATIVE TEAM ON VIDEO CODING (JCT-VC) OF ITU-T SG 16 WP 3 AND ISO/IEC JTC 1/SC 29/WG 11, 3RD MEETING: GUANGZHOU, CN, 7 October 2010 (2010-10-07)
E. ALSHINA ET AL.: "Known tools performance investigation for next generation video coding", ITU-T SG 16 QUESTION 6, VIDEO CODING EXPERTS GROUP (VCEG), 52ND MEETING, 19 June 2015 (2015-06-19)
Attorney, Agent or Firm:
BEIJING SANYOU INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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