This paper summarizes amount of mature algorithms, and studies the technology of the digital video constitution and camera calibration, and develops a pedestrian counting system for the video which is shot by gradient came.

The application of long-distance digital video supervisory and control technique in building construction project;

New method of signal design of digital video;

An improved collusion-secure digital ringerprinting scheme for digital video;

Talk bout digital video frequency monitor and control weighing system;

Study on digital video frequency long-distance supervisory control system of substation based on network communication;

Then,based on digital video frequency,image compression,wireless communication and long-distance control technologies,a project of WLAN is designed and exploited.

Introduces video model, digital video sampling and various compressed algorithm.

According to the characteristics and composition of the digital video CCTV supervision control system,this paper presents a detailed explanation about the realization of URT digital video CCTV supervision control system,and points out the merits and the developing trend of the URT digital video CCTV supervision control system.

With the development of digital technique,the data of digital AV is increasing.

In video digital decoding system the digital video stream should be delivered to PC for software-decoding.