By Topic

Selective Search Area Reuse Algorithm for Low External Memory Access Motion Estimation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Heejun Shim ; Samsung Adv. Inst. of Technol., Yongin, South Korea ; Chong-Min Kyung

In motion estimation for video codec, reducing the amount of external memory access is critical to reduce power consumption and to minimize performance degradation. Previous search area reuse algorithms to reduce the memory access still suffer from coding efficiency degradation in fast motion video. Previously, we proposed a selective search area reuse (SSAR) algorithm to reduce the amount of external memory access with minimal coding efficiency degradation. In this letter, we extend SSAR algorithm to multiple reference frame motion estimation with a method to utilize multiple on-chip memories. Then, we propose a frame-level dynamic search range algorithm based on the SSAR algorithm. Finally, we propose a memory usage switching method to increase the utilization of the limited-size on-chip memory. Experimental results show that the proposed algorithm with a search range of 16 achieves 28.64-56.24% reduction according to the number of on-chip memories in multiple reference frames. In the results of the Foreman video sequence, our algorithm operating with a fixed-size on-chip memory compensated for quality degradation by up to 2.7 dB in the frames of fast camera motion, and reduced the amount of memory access by 22.6% with a peak signal-to-noise ratio gain of 1 dB in the frames of camera shaking.

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:19 ,  Issue: 7 )