Stylus Communication Technology For Video Conferencing Systems

Desktop videoconference system possesses functions of video , audio , whiteboard , file transfer , application sharing,it is the developmental direction of videoconference currently.This task mainly analyses the white board system of them and tablet is inducted into this system. Because of introduction of tablet and increase of function parameters, we empolder a series of multiple pen-type functions which simulate true pen and include brush pen, pen, pencil, shade-pen, withered-pen, through utilizing these parameters reasonably .Take these functions as basis, we design more functions and much expressive force whiteboard system which buildup practicability of videoconference and make it accord with people natural custom of vision, hearing, writing to communication .At the same time, considering synchronization of video , audio , white board and workload of exploitation we realize more 'functions whiteboard system. We take integration and exploitation as guideline, take Visual C++ as tool and make full use of Microsoft NetMeeting COM module. Because multiple users operate on sharing space synchronously and bring conflict, we analyse the reason and adopt a basic concurrency control strategy to solve problem of concurrency conflict.At last, we test partly through lab LAN and campus web of Kunming university of science and technology and achieve good effect.we get moment achievement of anticipation.