Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/274
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dc.contributorDepartment of Electronic and Information Engineering-
dc.creatorFung, KT-
dc.creatorSiu, WC-
dc.creatorChan, YL-
dc.date.accessioned2014-12-11T08:23:53Z-
dc.date.available2014-12-11T08:23:53Z-
dc.identifier.isbn0-7803-7448-7-
dc.identifier.urihttp://hdl.handle.net/10397/274-
dc.language.isoenen_US
dc.publisherIEEEen_US
dc.rights© 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.en_US
dc.rightsThis material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.en_US
dc.subjectVideo bitstreamsen_US
dc.subjectMultipoint video conferencingen_US
dc.subjectFrame skipping transcoderen_US
dc.subjectMotion compensated macroblocksen_US
dc.subjectDCT coefficientsen_US
dc.titleA dynamic frame-skipping video combiner for multipoint video conferencingen_US
dc.typeConference Paperen_US
dcterms.abstractThis paper proposes a new architecture of video combiner for multipoint video conferencing. The proposed video combiner first identifies the active and talking conference participants from the multiple incoming video bitstreams by computing their corresponding motion activities and level of audio signals. By reducing the frame rates of inactive sub-sequences, more bits are reallocated to the active sub-sequences such that higher frame rates are obtained to produce a better visual perception as well as a smoother motion. We also propose a low-complexity and high-performance frame-skipping transcoder which is achieved by a direct summation of the DCT coefficients for non-moving macroblocks and an adaptive motion vector refinement for motion compensated macroblocks. The new transcoder is then used to realize the multipoint video conferencing and some results are presented to show the improvement in performance due to our proposed architecture.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitation2002 IEEE International Symposium on Circuits and Systems : proceedings : May 26-29, 2002, Fairmont Scottsdale Princess, Phoenix-Scottsdale, Arizona, U.S.A., p. III389-III392-
dcterms.issued2002-
dc.identifier.isiWOS:000186328000098-
dc.identifier.scopus2-s2.0-0036290984-
dc.identifier.rosgroupidr07832-
dc.description.ros2001-2002 > Academic research: refereed > Refereed conference paper-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_IR/PIRAen_US
dc.description.pubStatusPublisheden_US
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