Pixel-by-Pixel Active I/P conversion and interlaced video origination
Many of today's DVDs feature concert videos, documentaries, current events, sports, nature footage and other subjects originally captured on interlaced video. For this reason, any high-end progressive scanning system must solve the problem of motion artifacts for footage shot on video. Video based I/P conversion creates new pixels from existing information. For example, to enable progressive scan output for a field of odd scanning lines, the player must create the pixels that compose all the even scanning lines. Unfortunately, this can result in motion blur. Horizontal lines in the scene can flicker on and off. Other areas can suffer from an unnatural shimmer.
Scanning lines
EVEN Past 3 | ODD Past 2 | EVEN Past 1 | ODD current | EVEN future |
Time sequence
I/P conversion of video originated material. The red pixel, on an even scanning line needs to be created for the current field of odd scanning lines. If not done properly, this can result in zipper-like edges on moving objects, line flicker and unnatural shimmering.
Sony's Pixel-by-Pixel Active I/P conversion overcomes these problems with built-in motion detection and two distinct video conversion algorithms: one for still objects, another for moving objects. As with film origination, the algorithms are applied separately for each individual pixel. So both can be applied to different parts of any given scene!
ES DVD Players 2005, Version 4.0 | Page 14 |