所谓CCTV(Closed Circuit Television),即闭路电视的简称,是指一般情况下,由特定用户通过封闭线路使用的专用电视系统。CCTV在发展初期主要用于工业领域、工厂生产线的监控等,因此有时它也被称为ITV(Industrial Television)。而最近几年,在CCTV领域,非特定用户通过因特网远程观看网络摄像机拍摄图像的方式开始普及,如 The so-called Closed Circuit Television (CCTV), short for Closed Circuit Television, refers to a dedicated television system used by a specific user through a closed circuit in general. In the early days of development, CCTV was mainly used in industrial fields and factory production line monitoring, so sometimes it was also called ITV (Industrial Television). In recent years, in the field of CCTV, non-specific users through the Internet to remotely view the network camera to capture images began to popularize, such as