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dc.contributor.authorRichmond II, Richard Stevenen_US
dc.date.accessioned2014-03-14T20:32:36Z
dc.date.available2014-03-14T20:32:36Z
dc.date.issued2001-03-13en_US
dc.identifier.otheretd-03132001-140635en_US
dc.identifier.urihttp://hdl.handle.net/10919/31458
dc.description.abstractMotion estimation and motion compensation comprise one of the most important compression methods for video communications. We propose a low-power design of a motion estimation block for a low bit-rate video codec standard H.263. Since the motion estimation is computationally intensive to result in large power consumption, a low-power design is essential for portable or mobile systems. Our block employs the Four-Step Search (4SS) method as its primary algorithm. The design and the algorithm have been optimized to provide adequate results for low-quality video at low-power consumption. The model is developed in VHDL and synthesized using a 0.35 um CMOS library. Power consumption of both gate-level circuits and memory-accesses have been considered. Gate-level simulation shows the proposed design offers a 38% power reduction over a "baseline" implementation of a 4SS model and a 60% power reduction over a baseline Three-Step Search (TSS) model. Power savings through reduction of memory access is 26% over the TSS model and 32% over the 4SS model. The total power consumption of the proposed motion estimation block ranges from 7 - 9 mW and is dependent on the type of video being motion estimated.en_US
dc.publisherVirginia Techen_US
dc.relation.haspartFinal.pdfen_US
dc.rightsI hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to Virginia Tech or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report.en_US
dc.subjectFour-step searchen_US
dc.subjectLow poweren_US
dc.subjectMotion estimationen_US
dc.subjectH.263en_US
dc.titleA Low-Power Design of Motion Estimation Blocks for Low Bit-Rate Wireless Video Communicationsen_US
dc.typeThesisen_US
dc.contributor.departmentElectrical and Computer Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
dc.contributor.committeechairHa, Dong Samen_US
dc.contributor.committeememberReed, Jeffrey Hughen_US
dc.contributor.committeememberArmstrong, James R.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-03132001-140635/en_US
dc.date.sdate2001-03-13en_US
dc.date.rdate2002-03-14
dc.date.adate2001-03-14en_US


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