视频键盘控制系统主要是对系统的DVR（Digital video recorder）及球形摄像机和一些辅助系统在内的两个部分进行控制。具体说来，操作者通过监控专用键盘的摇杆，实现对摄像机上、下、左、右的运动控制；通过相应功能键调节摄像机镜头的焦距、光圈尺寸，并且能够设置不同线路间的切换，实现录制图像及回放等功能，对目标区域实行监控。视频键盘控制系统是视频监控系统的重要组成部分，在各类视频监控场合中发挥着越来越重要的作用。该控制系统操作简便，信息丰富，能广泛应用于各类视频监控系统。作为视频监控系统，其融合了多种功能，大限度地降低了控制电路的复杂程度。
本文对视频键盘控制系统的设计过程做系统的介绍，主要内容是W78E365单片机的程序设计，实现使用定制键盘控制摄像头活动的软硬件设计过程。
关键词：单片机，视频监控系统，键盘控制，硬件驱动，嵌入式C语言
ABSTRACT
Video keyboard control system is to control the system of DVR (Digital video recorder) and spherical cameras and a number of ancillary support. Specifically, a operator achieves the upper and lower, left and right movement control of the camera through the monitored dedicated keyboard’s rocker; adjusts camera’s lens focal length, aperture size through the corresponding function key, and also he can set up to switch between different lines, carry out recorded images and playback functions, so that can monitor the implementation of the target region. Keyboard video control system which is an important component of video surveillance system plays an increasingly important role in all types of video surveillance occasions. This control system is simple, rich information, and can be widely used in various types of video monitoring system. As a video surveillance system, it integrates multiple functions, therefore large extent reduces the complexity of the control circuit.
This article describes systematically about keyboard video control system design process. The main elements of this model is the program of single-chip W78E365, the hardware and software design process about achieving the use of custom-made keyboard to control the activities of the camera.
Keywords: Keyboard Control, Video Surveillance System, SCM, hardware drives, Embedded C
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