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文章建立了图像传输系统的逻辑模型,提炼了构成图像传输系统所需的典型逻辑器件,在详细分析高速公路业务管理特点的基础上,提出了高速公路图像传输系统的一般逻辑结构模型,讨论了该模型中各种逻辑器件在现有技术基础上的具体实现。进而具体提出了4种高速公路图像传输系统全数字化体系结构,并对每种结构的优缺点和实用性,以及全数字化系统中的录像问题进行了讨论。
The paper establishes the logical model of image transmission system and extracts the typical logic devices which are necessary for image transmission system. Based on the detailed analysis of the characteristics of expressway business management, a general logical structure model of expressway image transmission system is proposed. The various logical devices in the model are concretely implemented on the basis of the prior art. Furthermore, the full digital architecture of four kinds of expressway image transmission system is proposed in detail, and the advantages, disadvantages, practicality of each structure and the video recording problem in the all-digital system are discussed.