Efficient Media Synchronization Method for Video Telephony System

Chanwoo KIM  Kwang-Deok SEO  Wonyong SUNG  

IEICE TRANSACTIONS on Information and Systems   Vol.E89-D   No.6   pp.1901-1905
Publication Date: 2006/06/01
Online ISSN: 1745-1361
DOI: 10.1093/ietisy/e89-d.6.1901
Print ISSN: 0916-8532
Type of Manuscript: Special Section LETTER (Special Section on Human Communication II)
media synchronization,  video telephony,  multimedia communications,  

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In this letter, we derive an efficient audio/video synchronization method for video telephony. For synchronization, this method does not require any further RTCP packet processing except for the first one. The derived decision rule is far more compact than the conventional method. This decision rule is incorporated in an actual video telephony system adopting Texas Instruments (TI) OMAP 1510 processor and Qualcomm MSM 5500. The computational requirement was compared with the conventional method and through simulations the superiority of the proposed method is proved.