[Sundance]

Can some one explain a little about HDTV resolution? I'm looking at a Barco 808 or a Marquee 8500. I see they have the same tubes so this info. would apply to either.


One of the posts said the best one could get from these PJ is 768p. Isn't 1080i full max HD res. So these projectors reallly don't do full res HD?



Thanks

 

[HoustonHoyaFan]

Both of those pj will do HDTV, 1080i and 720p with no issues. Of the two HDTV resolutions 1080i (~540p) actually requires a less capable machine with a scan rate of 33.72 Khz. 720p requires 44.95Khz.


People on this forum will talk about not "resolving" the full 1920 picture elements in the 1080 lines. I have found out recently that while this is technically true, ie if you used a test pattern you would not be able to identify 1920 distinct elements on the 808/8500 class pj, most people would be hard pressed to see the difference on video images vs. the 9" CRTs which fully resolve. In addition I was told that the reality in the transmission chain is currently limited to ~1440 picture elements.


The RP CRTs currently sold are usually capable of only 1080i, most cannot support 720p!

 

[Sundance]

Quote:

Originally posted by HoustonHoyaFan Both of those pj will do HDTV, 1080i and 720p with no issues. Of the two HDTV resolutions 1080i (~540p) actually requires a less capable machine with a scan rate of 33.72 Khz. 720p requires 44.95Khz. The RP CRTs currently sold are usually capable of only 1080i, most cannot support 720p!

Your confusing me here. Don't these two statements say just the opposite and contradict each other?



Thanks

 

[HoustonHoyaFan]

RP is rear projection, the 808 and 8500 are front projection. The majority of HDTVs sold are RP which only support 1080i! The pjs you are considering will support much higher resolutions!

 

[Sundance]

Got ya, miss read the RP for FP ...daaaaa



Thanks