Abstract
While online lectures has been a mature application
for desktop PC, enabling access of live online lectures from
smartphones posses some unique challenges which can not be
solved with existing desktop-oriented online lecture systems. We
designed a new live online lectures system called PPClass-M
which is optimized for mobile scenario. It adopts an enhanced
HTTP-streaming based streaming protocol which can elegantly
handle the interim coverage outage and network switch
commonly found in of mobile network as well as better support of
the dynamic switch of consumed element streams needed to meet
the resource constraints of smartphones. It also features a
semi-3D based client GUI design which can deliver better user
experience on smartphones with constrained screen size
Users
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