Progressive scan (
also known as known as 480p) is one of two methods used
for "painting" an image on a television screen (the other being
interlaced scan), where the lines are drawn
in one at a time in sequential order. The entire single frame image is painted
every 1/60th of a second, allowing for twice the detail to be sent in the same
amount of time used in interlaced systems. Progressive scan is a method used in
today's
CRTs, computer
monitors
and high-end television displays. Progressive scanning results in a more
detailed image on the screen and is also less susceptible to the flicker
commonly associated with interlaced scanning.
Most television displays that are capable of progressive scanning can also
perform deinterlacing, which enables interlaced video to be viewed on
progressive scan sets. Progressive scan is now the standard of choice for both
DVD video and DTV. To use and view
progressive scanning technology the source (DVD player, High-definition cable or
satellite for example) and the display must both be progressive scan
compatible.
Compare with interlaced scan.
