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Parallelisation of block matching motion estimation algorithms

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Steliaros, M.K., Martin, Graham R. and Packwood, R. A. (1997) Parallelisation of block matching motion estimation algorithms. University of Warwick. Department of Computer Science. (Department of Computer Science research report). (Unpublished)

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Abstract

Block matching motion estimation accounts for a high computational overhead in most low bit-rate video coders intended for video-conferencing and multimedia applications. Conventional fixed size block matching (FSBM) and more sophisticated variable size block matching (VSBM) algorithms are profiled to determine how parallelism can be applied to increase efficiency. Three parallel implementations are considered: a homogeneous workstation network using PVM; a Parsytec Super-Cluster, 128-node T800 transputer-based MIMD machine; and a shared memory multiprocessor, using a 'threads' programming model. It is shown that significant improvements in computational performance can be made, even on commonly available computing platforms. Using an MPEG-4 image test sequence, detailed evaluation of a POSIX-conformant threads implementation resulted in near-theoretical maximum speedups being obtained.

Item Type: Report
Subjects: Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software
T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > Computer Science
Library of Congress Subject Headings (LCSH): Digital video, Parallel processing (Electronic computers)
Series Name: Department of Computer Science research report
Publisher: University of Warwick. Department of Computer Science
Official Date: January 1997
Dates:
DateEvent
January 1997Completion
Number: Number 12
Number of Pages: 12
DOI: CS-RR-320
Institution: University of Warwick
Theses Department: Department of Computer Science
Status: Not Peer Reviewed
Publication Status: Unpublished
Funder: Engineering and Physical Sciences Research Council (EPSRC)
Grant number: GR/J79997 (EPSRC)
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