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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 (Unpublished)
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PDF (Department of Computer Science Research Report)
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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 | ||||
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| Subjects: | Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| 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: |
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| 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| Status: | Not Peer Reviewed | ||||
| Publication Status: | Unpublished | ||||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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