Satellite multimedium bidirectional long-range real-time teaching systems

Abstract

The system utilizes multimedia client end, retransmitter, retransmission service centre, class management and service centre to carry on three functions of video-audio class, data class and class management. The multimedia client end scattered at each small satellite station is connected to internal connected retransmitter through Ethernet and the retransmitter is connected to external connected server which connects to retransmission centre of server at main satellite station through two-way satellite network connection. The class service centre is at server of the main satellite station and the multimedia client end is connected to retransmission center at main satellite station server and class management and service centre.

Description

technical field [0001] The invention relates to a multimedia long-distance real-time teaching system, in particular to a two-way satellite multimedia long-distance real-time teaching system, which belongs to the field of computer technology. Background technique [0002] With the rapid development of multimedia and network communication technology, network education / distance education has been derived from the original mode based on local area network and Internet to the mode based on two-way satellite network, and the research and application of multimedia real-time distance education based on two-way satellite network is also Notable achievements have been made. After searching for the novelty of the existing technology, two similar products were retrieved. They are: TrainNet developed by Israel Mentergy Company; Meeting point 4.5 developed by Israel VCON Company. [0003] TrainNet developed by Israel Mentergy Company is currently the most powerful interactive long-distan...

AI Technical Summary

Problems solved by technology

[0004] The existing system has the following problems: (1) It cannot support the normal interaction of video and audio on a too narrow backhaul bandwidth (for example, less than 100kbps); (2) It cannot support the cross-network transmission of multicast data, which leads to the inability of the system Send teaching resources directly to students' desktops; (3) Cannot support cross-network deployment of the system, which leads to a limited number of student terminals supported by the system (often the same number as satellite stations); (4) Most synchronous real-time teaching systems The multi-point group interaction mechanism in the video conferencing system is directly adopted, which is not suitable for real-time teaching

Using this interaction mechanism not only increases the complexity of upper-layer management, but also causes unnecessary system resource overhead, especially the overhead of network bandwidth resources.

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