The Research Of Ships Video Wireless Transmission Control System

In recent years, with the rapid convergence of embedded technologies, wireless communication technologies, image processing technologies and network technologies, ships video monitoring technologies has achieved great development. However, with the character of the special navigational condition, large video data quantity and the strong real time, the size of wireless communication channel bandwidth and the way of dealing with video data stream will decide the quality of the whole ships video monitoring system directly.This system chooses 32 bit low power ARM920T-based microcontroller AT91RM9200 as the kernel of hardware system, applies ANYDATA company's DTU-800 as wireless communication model, constructs embedded multiple task OS Linux as the software platform, makes use of CDMA 2000 1X network as wireless transmission media, it can transfer shipborne video and audio data stream of Ethernet format to Internet, between the shipborne monitoring station and offshore-based monitor and command center.Through proof and practical test, put forward the scheme of multi-channel bundling transmission, the system uses the routing controller as the main control model, and integrates with four CDMA 2000 1X channels, transmits video and audio signal as the same time, increases the bandwidth of communication channel, and controls the transmission of video and audio data stream by the method of multiplex polling redundancy, realize the transmission of huge video data, high-definition video images and real time audio in ships video monitoring system.By the research of this system, it can realize one of the methods that solve ships video communication bottleneck, led to the development of ships video monitoring system, improve the monitor ability and management of the coast and inland water ships aquatic traffic safety efficiently, offshore vessels will favor the decreasing of the occurrence of the sea traffic accidents and promote sea navigation safety.