Απάντηση: Xenon vs Uhp Part II
Μηπως να ρωτησουμε τον Γκρεγκ απο τι χρονολογια και πριν θεωρει μια παραγωγη παλαια ? :flipout::flipout::flipout::flipout::flipout:
Σορυ φιλος, δεν κρατηθηκα αλλο......
υγ, το παραπανω αποτελει χιουμορ, οχι ειρωνια. :ernaehrung004:
Διαβασε τι ακριβως λεει ο ιδιος για το θεμα, μιας που σε ενδιαφερει (αφου εσυ ειχες την απορια περι Rec.601 και HD):
I
've said for a long time that projectors should provide switchable SMPTE-C and Rec. 709 primary colors (if implemented correctly the complementary colors and all other colors simply follow from the primaries), in addition to whatever native primaries they may have. That is reasonably easy to do with a good CMS (color management system) in the projector. The Yamaha DPX-1200/1300 (1300 had a few improvements) had the best CMS for that purpose that I have seen. It provided the ability to enter the primary colors by their x,y values fairly accurately for users without measurement equipment (and of course could be adjusted more accurately with measurement equipment) and it would calculate the correct Lightness values for each color automatically (or that could be entered manually too). It also provided the ability to independently adjust the complementary colors in the same way, but that really wasn't necessary because the CMS was designed correctly. This was one major contributing factor to why I thought the Yamaha DPX-1300 was the best 720p projector (although it also had its flaws). The Sharp XV-Z series also provides a good CMS that will also allow you to get pretty close to accurate SMPTE-C and Rec. 709 primaries. It shouldn't be surprising that I gave very high marks to both the Yamaha and Sharp projectors for their color accuracy.
Anyway, to your question directly, I believe that
for the moment, most of the time the SMPTE-C primaries provide more natural color than Rec. 709 primaries with the currently available HD sources. There are certainly exceptions, where non-CRT monitors were used for monitoring, or where electronic CMS systems were used for partial correction of the color gamuts, or where telecine colorists judgement calls are significant to the results, etc. Therefore, I think it is really beneficial to be able to switch between both color gamuts and pick the one that works best with each piece of source material. When set up to do that kind of A/B comparisons I think a lot of people will agree with me that the color differences are very significant after they have looked at a variety of source material (particularly those rich in reds and purples - and/or - that have more saturated flesh tones). Of course, not everyone will agree with me - and that's perfectly fine - the majority of people prefer the even more saturated native primaries of most projectors (else the manufacturers wouldn't be making them that way - you can be sure of that !!!). I don't feel like its my role to convince users what they should like (but to help educate those that want to know more about video technology) - it's my role to report how projectors perform and then let users decide what they want based on what they like. (I do feel it's my role to try to influence manufacturer's to make projectors that perform accurately to the applicable standards - but they can do that and still provide other switchable modes that they believe generate more sales than adhering to standards.