480p to 720p?
Dear Gary: I read the interview with Joe Kane, the one about RKR Video DVD and the Princeton Graphics AF3.0HD monitor, and I talked to a couple of friends about it. One of them did not think that the RKR DVD was any good and that probably a (new) Panasonic monitor with regular DVD would do just fine. Since we are very enthusiastic but not all that knowledgeable and I cannot really put myself in the position "If it is good enough for Joe Kane it is good enough for me," we have a few questions DVD video data is stored in 480(p), correct? (per frame) If the above is true, then, how is the NTSC signal generated? Is it something like half of the lines from the first frame and in the next cycle half of the lines of the next frame? By reading the article I thought that the RKR would take all of the 480 lines, display it in the monitor, and you would have a full progressive frame (not interlaced). Something that a regular DVD cannot really do. On another matter, would you shed some light about how is the 480p image converted into a 720p image?
Clueless Fans From New England, Astorga-Vergara, Juan,
mailto:Juan.Astorga-Vergara@compaq.com
Video Technical Director Joe Kane Comments:
NTSC is generated in the player. Simply stated each frame is broken into two fields, then the appropriate fields are repeated in the correct sequence to create the 2/3 pulldown. "By reading the article I thought that the RKR would take all of the 480 lines, display it in the monitor, and you would have a full progressive frame (not interlaced). Something that a regular DVD cannot really do." That’s just the beginning. Once you are in the progressive domain it is fairly easy to translate to any other p format. That’s easy relative to the i to p conversion which isn’t needed. You can watch 24 frame material at 72 frames per second and not deal with the 2/3 motion artifacts. (My RKR unit is set for 600p/72.) "On another matter, would you shed some light about how is the 480p image converted into a 720p image?" That’s p to p conversion. As already pointed out, it’s something relatively easy to do.
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