Author Topic: Apple 4K TV Thread  (Read 21387 times)

Offline kardtoon

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Re: Apple 4K TV Thread
« Reply #45 on: January 31, 2018, 08:17 »
New firmware update for ATV 4K dynamically changes the resolution to match the content rather than force everything into 4K HDR. I've turned it on and Amazon Prime Video in 4K seems to look better.

I enabled this new feature on my Apple TV4k which is connected to my projector. Noticed that when I play a movie and the AppleTV is switching modes, screen goes black for a few seconds before it comes back again. Compared to no dynamic/frame rate matching which is instantaneous.

Do you see it too?

Offline tsammyc

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Re: Apple 4K TV Thread
« Reply #46 on: February 03, 2018, 18:40 »
On my Samsung TV, its instantaneous even when set to dynamic/frame rate matching. Say, I play a SDR iTunes movie, then a 4K HDR iTunes movie. No resetting of mode on the TV. I think the screen doesn't blank unless you are changing resolutions. Perhaps your projector needs to blank when it changes to HDR or frame rate...

Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #47 on: February 04, 2018, 11:26 »
Yes it does seem to be a projector issue. Less so with TVs
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Offline eggz

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Re: Apple 4K TV Thread
« Reply #48 on: February 08, 2018, 23:55 »
Anyone using Infuse 5 pro with their Apple TV 4K? It lets ATV4K stream movies from NAS etc. and will eventually support Dolby Vision.

Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #49 on: February 12, 2018, 18:38 »
Altered Carbon on NetFlix 4K HDR. Just about doable on ADSL2+ when stars align.

Pretty damn impressive.
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Offline eggz

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Re: Apple 4K TV Thread
« Reply #50 on: February 13, 2018, 09:18 »
Altered Carbon on NetFlix 4K HDR. Just about doable on ADSL2+ when stars align.

Pretty damn impressive.

Is it in Dolby Vision?

Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #51 on: February 13, 2018, 12:11 »
Yes I believe it is - but I am watching it on a Sony ZD9 and 760ES which isn't DV
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Offline Audiolab

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Re: Apple 4K TV Thread
« Reply #52 on: February 13, 2018, 20:35 »
ZD9 will be getting DV update soon right?

Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #53 on: February 13, 2018, 21:00 »
ZD9 will be getting DV update soon right?

Yes. But.

It is a new DV implementation with heavier processing done on source end rather than display end. That new firmware is already out in US and Europe. But not Australia. It currently enables DV on the built in app - like the NetFlix one.

But UHD and streaming players will need new firmware to support it over HDMI.

AppleTV 4K apparently has a beta firmware that works with the ZD9 DV implementation

Still waiting for Aus to get the new firmware.
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Offline Audiolab

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Re: Apple 4K TV Thread
« Reply #54 on: February 13, 2018, 21:12 »
Not familiar with DV, what do you mean processing done on source rather than display? Is that unique to Sony or is LG doing the Same?

Yes. But.

It is a new DV implementation with heavier processing done on source end rather than display end. That new firmware is already out in US and Europe. But not Australia. It currently enables DV on the built in app - like the NetFlix one.

But UHD and streaming players will need new firmware to support it over HDMI.

AppleTV 4K apparently has a beta firmware that works with the ZD9 DV implementation

Still waiting for Aus to get the new firmware.

Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #55 on: February 14, 2018, 07:05 »
I believe the reason is that DV used to be a hardware implementation on the display and source.

But they have now made DV a software implementation too.

Sony’s version of DV is the latest form.

This requires the source to decode part of the DV stream ahead of the display. The previous method sends the full DV stream to the display which decodes it fully.

I guess if you are familiar with MQA it sounds similar - there is a first level unfold and a second stage deblurring filter. You can now get the player/source to unfold the first level.
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Offline Audiolab

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Re: Apple 4K TV Thread
« Reply #56 on: February 14, 2018, 08:23 »
Thanks for the info. Not familiar with MQA also. However your explanation is very clear!

I wonder how this 2 step decoding will be in terms of picture performance vs the older 1 step decoding.........

I believe the reason is that DV used to be a hardware implementation on the display and source.

But they have now made DV a software implementation too.

Sony’s version of DV is the latest form.

This requires the source to decode part of the DV stream ahead of the display. The previous method sends the full DV stream to the display which decodes it fully.

I guess if you are familiar with MQA it sounds similar - there is a first level unfold and a second stage deblurring filter. You can now get the player/source to unfold the first level.

Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #57 on: February 14, 2018, 15:01 »
According to Dolby the end result is the same..

who knows?
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Offline Doggie Howser

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Re: Apple 4K TV Thread
« Reply #58 on: March 04, 2018, 19:29 »
I have to say the AppleTV 4K looks simply stunning with everything.

NetFlix with HDR

GrandTour on Amazon Prime with HDR.

Even on older shows like House of Cards. OMG. Devoured 3 seasons in a week.

The first season wasn’t true 4K but upsampled still looks great.
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Offline desray

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Re: Apple 4K TV Thread
« Reply #59 on: March 04, 2018, 20:31 »
Personally I think streaming will EVENTUALLY be the way to go...now that HEVC codecs able to pack a 4K stream in a more efficient package for streaming and HDR 10 and DV (another one HDR10+ with Samsung leading the way and a few supporters to bolster) along with Dolby Atmos appearing in popular streaming networks like Netflix, Hulu, Amazon etc...physical disc will be a thing of the past in say a few years time. I am withholding purchase of 4K UHD discs since last year as most of the latest titles will eventually land up in Netflix.