of Skynet Engineering is to deploy cameras. These nodes are divided into one
type of monitoring points and two types of monitoring points. One type of
point mainly covers road plazas, subways and other crowded areas, and the
second type of points are mostly important public spaces such as hospitals
and parks. Taking Guangzhou as an example, in a Guangzhou video system
construction plan released in 2013, the number of first-class points in the
city reached 58,000, and the number of second-class points reached
Different types of monitoring points have different requirements for the camera. The newly set one type of point is mostly HD camera, which requires image resolution higher than 1280×720, and is monitored by the public security for 24 hours. The second type of point is relatively loose, the budget is about half of a class, and the real-time monitoring is carried out by the relevant units, not the public security.
Common surveillance cameras are divided into domes and guns according to their shape. The guns are usually installed indoors, corridors, entrances and exits, etc. where fixed monitoring is required. The advantage of the ball machine is that it can rotate 360 degrees in the horizontal direction, and more in the open space, and rotate the cruise according to the specific situation.
These monitoring devices generate a large amount of image data every day, and how to transmit and store video data is also a technical difficulty of Skynet Engineering. The key to video transmission is to minimize the delay. The optical fiber transmission connecting the video optical transceiver is the mainstream solution today. The delay from the front end to the monitoring center can be controlled within 2 seconds.