Initialization of Model Based Coding for Customizing Networked Conference Video
2003 (English)Report (Other academic)
This paper considers the problem of video content adaptation for a mobile user in a networked conference application. Due to big variation of network bandwidth, it is challenging to keep the accessibility to the video content for mobile user. This paper suggests using an UMA engine for customizing video according to mobile user’s network environment. The video content customization could be achieved by using the normal video codec when network transmission is smooth and switching to a very low bit rate Model based coding (MBC) codec when network bandwidth is small. As an crucial step of this customization, the initialization of the MBC is studied in detail. Initialization of MBC is to fit a generic face model onto the face of the talking head appearing in the first video frame. The paper discusses what is a proper initialization scheme for the UMA engine, and suggests a strategy for solving the initialization problem, using Simulated annealing (SA) within a ABS framework. Promising performance results from the suggested approach are reported.
Place, publisher, year, edition, pages
Umeå: Tillämpad fysik och elektronik , 2003. , 25 p.
DML Technical Report, ISSN 1652-8441
IdentifiersURN: urn:nbn:se:umu:diva-428OAI: oai:DiVA.org:umu-428DiVA: diva2:143439