Sub-Block Based Global Motion Estimation for Affine Motion Model

2018 ◽  
Author(s):  
T Musarath ◽  
Unnikrishnan K Supriya ◽  
G Sreelekha
Keyword(s):  
Motion Estimation ◽  
Motion Model ◽  
Global Motion ◽  
Global Motion Estimation ◽  
Affine Motion ◽  
Block Based ◽  
Affine Motion Model

scholarly journals An Improved Fast Affine Motion Estimation Based on Edge Detection Algorithm for VVC

Symmetry ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1143
Author(s):  
Weizheng Ren ◽  
Wei He ◽  
Yansong Cui
Keyword(s):  
Motion Estimation ◽  
Video Coding ◽  
Motion Compensation ◽  
Gradient Descent ◽  
High Efficiency ◽  
Detection Algorithm ◽  
Motion Model ◽  
High Efficiency Video Coding ◽  
Affine Motion ◽  
Affine Motion Model

As a newly proposed video coding standard, Versatile Video Coding (VVC) has adopted some revolutionary techniques compared to High Efficiency Video Coding (HEVC). The multiple-mode affine motion compensation (MM-AMC) adopted by VVC saves approximately 15%-25% Bjøntegaard Delta Bitrate (BD-BR), with an inevitable increase of encoding time. This paper gives an overview of both the 4-parameter affine motion model and the 6-parameter affine motion model, analyzes their performances, and proposes improved algorithms according to the symmetry of iterative gradient descent for fast affine motion estimation. Finally, the proposed algorithms and symmetric MM-AMC flame of VTM-7.0 are compared. The results show that the proposed algorithms save 6.65% total encoding time on average, which saves approximately 30% encoding time of affine motion compensation.

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