TVL (TV Lines)
Analog surveillance video resolution is measured in terms of broadcast TV lines as viewed on a monitor screen. Video quality is charted with converging lines of higher and higher density. The TVL resolution number is the line density where the camera is no longer able to reproduce individual lines. The higher this number is, the better the picture.
The digital recording resolution can be expressed in effective pixel dimensions.
Typical pixel dimensions:
||510 x 492
||768 x 494
||811 x 508
||976 x 582
Learn how Digital Recorders interact with TVL images