Video data through motion detection, MPEG-4 compression, and the use of UDP protocol located above the RTP / RTCP protocol is sent to the remote receiver. 视频数据经过运动检测、MPEG-4压缩处理后,利用位于UDP协议之上的RTP/RTCP协议将编码后的视频流发送到远程接收端。
The sub-system includes the displacement data collecting by GPS, data compression of the collected data, encapsulation of the compressed data according to TCP / IP protocol, and transmission of the encapsulated data to data transmission sub-system. 该子系统首先对GPS位移监测数据进行采集,然后对采集数据进行压缩,再按TCP/IP协议对压缩后数据进行封装,最后将封装后的TCP/IP数据包发送到数据传输子系统。
The large information capacity of multimedia data and the limited transmission bandwidth make the compression code of the video / audio, the option of network protocol and the framework of stream media server the key technology in real-time tutoring system. 由于多媒体数据的大信息量和有限的传输带宽,使得视音频的压缩编码、网络协议的选择以及流媒体服务器的架构成为实时教学系统中的关键技术。