本系统的基本思想是针对我国现行城市路网结构及交通流的具体特点，基于交通信号区域控制理论展开的。
The basic idea deals with our country nowadays city traffic network structure and traffic flow based on traffic signal area control theory.
在关键帧判别模块和重要区域识别模块的输出信号控制 下，编码模块对视频数据进行压缩编码。
The coding module compresses and codes the video data under the control of the output signal of the key frame discriminant module and the important regional identification module.
在区域控制单元中，分别介绍了处理单元、输入信号检测、看门狗电路、通信扩展的设计。
Also many design methods are put forward when introducing of the area part, such as processing unit, input signal detection, watch dog circuit, extended communication and so on.
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