interlacing
1. <hardware> A video display system which builds an image on the VDU in
two phases, known as "fields", consisting of even and odd horizontal lines.
The complete image (a "frame") is created by scanning an electron beam
horizontally across the screen, starting at the top and moving down after each
horizontal scan until the bottom of the screen is reached, at which point the
scan starts again at the top. On an interlaced display, even numbered scan lines
are displayed in the first field and then odd numbered lines in the second
field.
For a given screen resolution, refresh rate (frames per second) and phosphor
persistence, interlacing reduces flicker because the top and bottom of the
screen are redrawn twice as often as if the scan simply proceded from top to
bottom in a single vertical sweep.
2. <graphics> progressive coding.
(1998-02-25)
Nearby terms:
Interior Gateway Protocol « interlace « interlaced
image «
interlacing » Interlan » Interleaf » interleave
|
