Fast motion estimation algorithms for overlapped block motion compensation

Rajesh Rajagopalan; Lurng-Kuo Liu; Wei Ding; Ephraim Feig

doi:10.1117/12.235426

22 March 1996 Fast motion estimation algorithms for overlapped block motion compensation

Rajesh Rajagopalan, Lurng-Kuo Liu, Wei Ding, Ephraim Feig

Proceedings Volume 2668, Digital Video Compression: Algorithms and Technologies 1996; (1996) https://doi.org/10.1117/12.235426
Event: Electronic Imaging: Science and Technology, 1996, San Jose, CA, United States

Abstract

While block motion compensation has been the preferred method for reducing inter-frame dependencies in most standards for video coding (H.261, MPEG), a new proposal for very low bit rate video coding (H.263) has included overlapped block motion compensation (OBMC) as an optional mode of operation. In this paper, we present fast algorithms for motion estimation when compensating with OBMC. Standard block matching motion vectors are not optimal for OBMC. Our algorithms estimate which block motion vectors yield the most improvements upon optimizing motion, orders the blocks and optimizes motion vectors based on the ordering. The estimation is based on readily available information about block matching, viz., prediction errors over blocks. As simulation results will demonstrate, the algorithms result in near optimal performances at low computational costs. An additional advantage of the algorithms is that they may be terminated after a few motion vectors have been optimized and still result in high performance gains. This is of advantage in situations where the available computational power at the encoder varies (as in a videophony situation where the frame rate adapts depending on scene activity or available band-width) and it becomes desirable that the motion vectors chosen for optimization result in the highest gains possible.

Citation Download Citation

Rajesh Rajagopalan, Lurng-Kuo Liu, Wei Ding, and Ephraim Feig "Fast motion estimation algorithms for overlapped block motion compensation", Proc. SPIE 2668, Digital Video Compression: Algorithms and Technologies 1996, (22 March 1996); https://doi.org/10.1117/12.235426

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available