Yeah you are right. I caught that after I sent it. I meant to say 1, 3, 5 etc all the way to 1079 then 2, 4, 6 , etc to 1080. That is your interlaced frame. 540p is 1 field of 540 lines then another UPDATED field of 540 lines. This makes the picture look smoother. In 1080i you have a total of 1080 lines but they are made up of 2 fields of 540 lines. So in actuallity, the 540p might look better because it is smoother. If you want the ultimate go with 1080p. I think only CRT projectors can handle it.
On 8/12/05, Hamish Moffatt <[EMAIL PROTECTED]> wrote: > On Thu, Aug 11, 2005 at 09:17:26AM -0500, James Oltman wrote: > > On 8/11/05, Hamish Moffatt <[EMAIL PROTECTED]> wrote: > > > However in 1080i you have 1080 lines, updated 30 times per second. > > > In 540p, you only have 540 lines! The resolution is halved, and it's > > > not much more than 480i. > > > > You are confusing frames, and fields. In 1080i, you have 2 fields of > > 540 lines a piece. The first field uses lines 1, 3, 5, etc all the > > way to 539 or whatever. The second field uses lines 2, 4, 6, 8 etc > > all the way to 540. Those two fields equal one frame of 1080i (i = > > interlaced). When you have 540p you are actually writing all 540 > > lines in both fields, thus making for a cleaner, smoother picture. If > > Yes, this is true. But, you only have 540 lines! You wrote them twice as > often, but there were only 540 unique lines. In 1080i mode, you have > 1080 unique lines updated half as often. > > Theoretically you could make it equivalent to 1080i by displaying > alternating lines (odd/even) of a 1080 line frame on your 540p display. > ie perform the interlacing in software. > > > anyone can add/correct me, please chime in. I am fairly certain that > > is how this works. It's been about a year since I played with HDTV > > modelines. > > That is how it works, but it does not make them equivalent. > > > cheers > Hamish > -- > Hamish Moffatt VK3SB <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> > > > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users > > > _______________________________________________ mythtv-users mailing list [email protected] http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
