AfterDawn: Glossary


525/60 refers to a NTSC analog TV signal. Although NTSC only has 486 horizontal lines in its Active Area, a NTSC video signal also includes extra vertical sync lines, which are basically just filler timed to allow the electron guns in a CRT television time to reposition themselves at the top of the screen. There are 39 vertical sync lines, resulting in a total of 525 lines (486 + 39).

60 is a reference to NTSC's Fieldrate of approximately 60 Fields per second, resulting in 29.97 (30 / 1.001) Interlaced frames per second.

Related Guides
Digital Video Fundamentals - Resolution and Aspect Ratio

Related glossary terms

Related software tools

Freeware for Windows Rating: 3.12
Freeware for Windows Rating: 2.82
Freeware for Windows Rating: 3.32
Freeware for Windows Rating: 3.42


Select a term to see the explanation