A Sharing System Design And Implementation For Multimedia Projection

The sharing system for multimedia projection is the priority research focus on themultimedia applications technology areas. The existed projection method used for multi-useris not so convenient due to the cable connection technologies limitations. The method throughswitching the VGA connection or copying the demo files is not applicable when the numberof users is large or switching frequently, which is not only tedious and time-consuming, butalso can result in computer viruses as well as other security problems. Embedded projectiongateway may solve the problem by means of wireless projection, the shortcomings is highcost and low performance etc. Therefore, aimed to solve the multi-user switching problemthen research and design the sharing system of the wireless multimedia projection have animportant practical meaning, which could expand the range of multimedia projectiontechnology applications.The main contents of this paper as follows:1) Designing system model based on the functional requirements of projector sharingsystem;2) Designing multi-user projection sharing scheme and data transmission calibrationscheme based on the TCP/IP network communication protocol;3) Designing and realizing the way to capture and display the user projection informationby the way of GDI;4) Researching out the best image compression scheme suitable for the system based onZlib and JPEG algorithm,The innovations of this paper are designing a multi-user projection sharing scheme anddata transmission calibration scheme, combined with TCP and UDP protocol’s advantages.Which not only ensure the reliability of the projection but also can effectively deal withconflict by using feedback switching scheme.The final test results show that multimedia projector sharing system prototype designedin this paper can satisfied the need for multi-user projection sharing system, and the userswitching response time is only about one second. Since this system uses regular types ofwireless local area network and computer to make projector sharing, then the system islow-cost and high performance, so the program has a very wide range of prospect in themarket.