NDLI: Statistical analysis of thresholding errors for adaptive projection-based fast block matching motion estimation

Content Provider	IEEE Xplore Digital Library
Author	Jing Cai Pan, W.D.
Copyright Year	2009
Description	Author affiliation: Dept. of Electrical and Computer Engineering, University of Alabama in Huntsville, 35899, USA (Jing Cai; Pan, W.D.)
Abstract	Fast and accurate block-based motion estimation (BME) is desired in many video coding systems. By conducting block matching in lower dimensional projection space, followed by candidate exclusion through thresholding, projection-based BME (PBME) methods can run several times faster than the exhaustive full search method, with little loss in accuracy. In PBME methods, the appropriate choice of threshold is critical, as the threshold controls the important trade-offs between complexity and accuracy. In the literature, PBME methods rely on fixed thresholds that were chosen on an ad hoc basis. This paper provides an in-depth analysis of errors due to thresholding in PBME, based on the sum absolute difference (SAD) as the matching criterion. A new PBME method is proposed that can adaptively select thresholds according to a target probability of error. Simulation results show that this adaptive method can offer highly scalable complexity/accuracy tradeoffs desired in many fast BME algorithms.
Starting Page	1
Ending Page	4
File Size	145197
Page Count	4
File Format	PDF
ISBN	9781424445936
DOI	10.1109/PCS.2009.5167449
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-05-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Video coding Statistical analysis Error analysis Error probability Motion estimation Computational modeling threshold PBME Degradation Search methods Computer errors Bismuth probability of error
Content Type	Text
Resource Type	Article

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