progressive segmented frame (TV) (psF)

The scanning methods for video display are interlaced scan and progressive scan, the continuous, top-to-bottom image display.

There is a significant difference between these two methods. In interlacing, two fields are displayed with a line offset. Each field has a vertical blanking interval. Progressive scan is different, working with one full frame and having only one vertical blanking interval. For this reason, some studio equipment cannot necessarily derive one with progressive scan from an interlaced signal. The same is true for CRT monitors, which produce an analog blanking signal.

Progressive Segmented Frame (psF) eliminates these disadvantages by splitting a full frame into two subframes, each consisting of the odd and even lines. The difference with interlaced frames is that the two fields have only one motion phase per frame instead of two.

By this measure, 1.080psF of high-definition television HDTV is compatible with 1.080i, but not with 1.080p. A corresponding variant also exists for Standard Definition Television( SDTV).