Progressive Scan

A superior way of viewing video images compared with the traditional interlaced method. With interlacing, the two fields of each video frame(the odd and even horizontal lines) are shown one after another. With progressive scanning all of the horizontal lines of the frame are displayed in one go.
The benefits are lack of 'flicker' and jagged edges typical of interlaced displays like CRT televisions and smoother horizontal resolution.
A number of DVD players can output video progressively, although it is not offically available with NTSC material. The signal must be fed to a non-interlaced display such as a plasma screen or LCD or DLP projector.
Certain televisions also feature progressive scan (or deinterlacing). Such sets analyse the video signal and insert extra scanning lines to increase the apparent resolution (compare with 100Hz scanning).