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<blockquote data-quote="Stergios Giotas" data-source="post: 1058289830" data-attributes="member: 1573"><p>Παρακάτω μια σύντομη και εμπεριστατωμένη εξήγηση για ποιο λόγο δε θα δούμε σύντομα το Dolby Vision σε προβολείς:</p><p></p><p></p><p><a href="https://forum.blu-ray.com/showthread.php?p=15286674" target="_blank">https://forum.blu-ray.com/showthread.php?p=15286674</a></p><p></p><p></p><p>Dolby Vision relies on the algorithms knowing the display’s capabilities to properly tone map HDR content. Since for projectors brightness levels depend on many variables that are determined by setting, equipment, and time (ambient light, screeen’s gain, loss of brightness with time, etc), there would be no way for the algorithms to automatically know the brightness of a projectior on the screen. Hence, no projector makers have released one with Dolby Vision. </p><p></p><p>Dolby Cinemas use Dolby Vision because they use specific equipment and control ambient-light to the point that they know how to calibrate it so that the light from the screen reaches a specific level which Dolby Vision can use to properly render the picture through the projector. Since at home equipment and ambient light varies so much from setup to setup, there’s no current way for companies to include it and make sure that it works as intended. For flat screens it’s a different story because their brightness levels are known and they don’t noticeably degrade until thousands upon thousands of hours later, and ambient light affects their performance way less compared to projector setups. I think it will come to projectors at some point but not anytime too soon.</p><p></p><p></p><p>You don’t need 4,000 nits to be able to play DV content. Dolby Cinemas hit only about 106 nits, and no current consumer display available can achieve that brightness yet. It is true that DV discs are mastered at 4,000, but for DV to work properly, it just needs to know the displays capabilities/limitations in terms of contrast, brightness, color, etc., and it’ll tone map as appropriate within those capabilities to properly render the picture on the given display.</p><p></p><p>That’s why it is the superior HDR format right now. It not only does it dynamically change the metadata to enhance the picture, but it does so within the displays’ limitations so that the picture is compromised minimally or not at all (depending on the display).</p></blockquote><p></p>
[QUOTE="Stergios Giotas, post: 1058289830, member: 1573"] Παρακάτω μια σύντομη και εμπεριστατωμένη εξήγηση για ποιο λόγο δε θα δούμε σύντομα το Dolby Vision σε προβολείς: [url]https://forum.blu-ray.com/showthread.php?p=15286674[/url] Dolby Vision relies on the algorithms knowing the display’s capabilities to properly tone map HDR content. Since for projectors brightness levels depend on many variables that are determined by setting, equipment, and time (ambient light, screeen’s gain, loss of brightness with time, etc), there would be no way for the algorithms to automatically know the brightness of a projectior on the screen. Hence, no projector makers have released one with Dolby Vision. Dolby Cinemas use Dolby Vision because they use specific equipment and control ambient-light to the point that they know how to calibrate it so that the light from the screen reaches a specific level which Dolby Vision can use to properly render the picture through the projector. Since at home equipment and ambient light varies so much from setup to setup, there’s no current way for companies to include it and make sure that it works as intended. For flat screens it’s a different story because their brightness levels are known and they don’t noticeably degrade until thousands upon thousands of hours later, and ambient light affects their performance way less compared to projector setups. I think it will come to projectors at some point but not anytime too soon. You don’t need 4,000 nits to be able to play DV content. Dolby Cinemas hit only about 106 nits, and no current consumer display available can achieve that brightness yet. It is true that DV discs are mastered at 4,000, but for DV to work properly, it just needs to know the displays capabilities/limitations in terms of contrast, brightness, color, etc., and it’ll tone map as appropriate within those capabilities to properly render the picture on the given display. That’s why it is the superior HDR format right now. It not only does it dynamically change the metadata to enhance the picture, but it does so within the displays’ limitations so that the picture is compromised minimally or not at all (depending on the display). [/QUOTE]
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