Official Sony [X9] XBR-55X900A / XBR-65X900A Owner's Thread - Page 436 - AVS | Home Theater Discussions And Reviews
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post #13051 of 13055 Unread Yesterday, 02:19 PM
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Originally Posted by AustinJerry View Post
The firmware update upgraded ALL HDMI connections to HDMI 2.0. No issue there. The other update was to make HDMI4 compatible with HDCP 2.2 content protection, which is a requirement to use the Sony 4K media player. That was a board update, not a firmware update. I am not sure that HDCP 2.2 is a requirement for using your fancy new PC.

Whether the HDMI 2.0 upgrade supports 60Hz or not, I don't know for sure. I say give it a try, and good luck.
Thanks, appreciate the speedy response - yes, what you say makes sense. I think (think) a picture is beginning to emerge and it doesn't look too good.

The HDMI 2.0 update seems to add 60MHz functionality on all HDMI ports, but only at 4.2.0 8bit. Apparently this colour bit level is pretty bad, especially at 4k (so as to make anything other than movie content un-usable). 4.4.4 is the HDMI 2.0 ratified bit depth, and without that I'm in trouble.

The HDMI 4 port engineer upgrade now makes sense, thank. This adds the required compatibility for HDCP 2.2 content protection (needed for Netflix, etc..). What is not clear is if that same port upgrade, will also bring 4.4.4 60Mz operation (i.e. let me connect my rig to HDMI 4, to resolve any problems).

If anyone with the upgrade is able to shed any light, I'd really be grateful - though I'm not sure how you'd know (I'm blowed if I can find any info on the upgrade board itself).

I'm seriously wondering if I should try and cancel my PC order (custom build, so an worried I won't). Only other option is a 4k TV upgrade!... laughable after only 18 month use. Wow, what a muddle!
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post #13052 of 13055 Unread Yesterday, 03:21 PM
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Did someone just send up the Geoff-signal?

roo, this TV will not accept 4:4:4 4K60p, it's about that simple. The board upgrade doesn't change the HDMI's processing capabilities, it only adds the new HDCP 2.2 copy protection which is essential for playing back commercially available 4K content from the Sony media player and (eventually) UHD Blu-ray. But it will definitely accept 4K50/60p @ 8-bit 4:2:0 on all ports.

As for the chroma subsampling itself, 4:2:0 is just as much a part of the HDMI 2.0 specification as the 4:2:2 and 4:4:4 variants are. Bear in mind that the chroma component of a 4K 4:2:0 signal is technically still at 1080p resolution while the luma is at full 2160p, so it'll hardly look like some crusty old NES game, and the increased temporal resolution (frame rate) of a 4K60p image will go a LONG way to improving the picture too. (Even 1080p60 gaming is mightily impressive to my eyes because of the frame rate.) Will you get the utmost out of your fancy-pants gaming rig? Probably not, but it'll still look damned good.
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post #13053 of 13055 Unread Yesterday, 05:00 PM
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Did someone just send up the Geoff-signal?

roo, this TV will not accept 4:4:4 4K60p, it's about that simple. The board upgrade doesn't change the HDMI's processing capabilities, it only adds the new HDCP 2.2 copy protection which is essential for playing back commercially available 4K content from the Sony media player and (eventually) UHD Blu-ray. But it will definitely accept 4K50/60p @ 8-bit 4:2:0 on all ports.

As for the chroma subsampling itself, 4:2:0 is just as much a part of the HDMI 2.0 specification as the 4:2:2 and 4:4:4 variants are. Bear in mind that the chroma component of a 4K 4:2:0 signal is technically still at 1080p resolution while the luma is at full 2160p, so it'll hardly look like some crusty old NES game, and the increased temporal resolution (frame rate) of a 4K60p image will go a LONG way to improving the picture too. (Even 1080p60 gaming is mightily impressive to my eyes because of the frame rate.) Will you get the utmost out of your fancy-pants gaming rig? Probably not, but it'll still look damned good.
Geoff, you are a god send! I've been researching this all night and you're bang on the money. 4.2.0 8bit is far from the disaster I was reading about, indeed it's simple high colour bit depth, instead of Deep (10bit) or higher.

Indeed, even some HDMI 2.0 ports on more recent TV's are also constrained to 4.2.0 8bit, quite simply because that is is the colour depth most video content is encoded at (inc Blu-Ray). There I was, assuming I was going to get 16 colours or something - not at all. lol.

These two links I stumbled across, really helped put my mind at rest (and explain the science)... and you post Geoff, sealed the deal! You sir are a legend, as is AJ of course. The forum wouldn't be the same without you both!

http://www.toonormal.com/2014/01/10/...nd-deep-color/

http://www.geeks3d.com/20141203/how-...our-4k-uhd-tv/

I will genuinely sleep easier tonight guys - thanks so much to answering the call!

The rig and I salute you!...


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post #13054 of 13055 Unread Today, 05:45 AM
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No worries. And it's worth mentioning that it's quite capable of accepting up to 12-bit 4:4:4 for 4K24 signals too. It won't display such signals at their full whack because the panel is only 10-bit ('only' ) but these sets aren't as gimped as people would have us believe.
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post #13055 of 13055 Unread Today, 07:01 AM
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The rig and I salute you!...

I dropped £4,300 on the PC rig last night.
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