Not exactly Maxwell Smart’s Cone of Silence, there was a time when security staff members monitoring blurry CCTV video images on CRTs would look through a kind of cone device to cut down on monitor glare.
Nowadays, there are huge video walls in command and control rooms and security video monitoring has moved way beyond staring at a screen. Live monitoring now relies on watching pieces of action and clips generated by simple or sophisticated analytics. There has been a noticeable shift from live monitoring to retrieval of images for forensics, investigation and business management needs.