AppleTV with iPhone/iPad
LightSpace's Connect or CalMAN's MobileForge have iOS versions for each App, it can installed to iPhone/iPad devices but not directly to AppleTV, since AppleTV has tvOS operating system.
It will require to run each App to your iPhone/iPad and then use AirPlay Mirroring for the AppleTV (2nd gen or later are supported).
For iOS devices, users can get HDMI Output (without AppleTV) by using Apple’s Lightning Digital AV Adapter; or for older iOS devices an Apple Digital AV Adapter.
These two Apple's Digital AV Adapter solutions are not recommended to be used, because they can provide bit-perfect patch generation only for grayscale patches, not bit-perfect color patches.
The Apple's Digital AV Adapters issue has been added to 'Known Devices Limitations with MobileForge
' web page, after consumers find out and reported these issues many times to AVSForum.com or SpectraCAL's Forum (which has been closed).
The issue has been confirmed by Joel Barsotti also, it has the lead programmer, developer and color scientist of CalMAN 4/5, but he has left SpectraCAL from October 2016.
If you will use CalMAN's MobileForge to generate patterns for a TV/Projector, you want CalMAN in Video Levels (16-235), then in the MobileForge tab (Middle Tab at the top of CalMAN) the 'Expand to PC Levels' box needs to be checked, because the video output will get compressed at the end.
Whatever iPhone/iPad device which CalMAN's MobileForge is driving works in PC Levels, then each device then converts to Video Levels when it pipes the generated pattern through the HDMI output.
When CalMAN will send command to generate 100% White 235.235.235 RGB Triplet to MobileForge App of iPhone, the iPhone will render it as 255.255.255 (RGB-Triplet) and send it to the HDMI Adapter where it will be compressed back to video levels 235.235.235 (RGB-Triplet) or 235.128.128 (YCbCr-Triplet).
Tyler Pruitt (Technical Evangelist for CalMAN) is not recommending to use these Apple Digital AV Adapters, as he has posted to AVSForum.com:
Before enabling the AirPlay Mirroring, the AppleTV video output must be set to YCbCr colorspace. On the Apple TV menu, go to Settings > Audio & Video > HDMI Output > YCbCr.
AppleTV has additional colorspace video output options, RGB-High and RGB-Low, but using any RGB selection, the incorrect conversion math of internal processing will increase even more the digital errors to the device video output.
Apple TV devices with proper settings can generate any RGB-Triplet combination for RGB-Video (16-235), but they can't generate for RGB-Video Extended (16-255).
There output differences over different generations of AppleTV devices also.
Below you will see a Digital Pixel Level Analysis evaluating all available colorspace video output settings of AppleTV (3rd Gen) using iPhone's AirPlay Mirroring of CalMAN's MobileForge patches, DVDO's AVLab TPG used as analyzer device.
CalMAN's ColorChecker Classic and Color Gamut (Primary & Secondary colors with 100% Saturation and 100% Stimulus Level) patch generation used for that test.
The following animated PNG file will swap with one second interval between three verification result pictures; YCbCr 4:4:4, RGB-High and RGB-Low colospace video output of AppleTV (3rd Gen) using CalMAN's MobileForge App:
As you can see, using CalMAN's MobileForge with AppleTV (3rd Gen), it can't provide a bit-perfect patch generation, so its not recommended as a patch generation solution.
Performing the same test with LightSpace Connect App using iPhone AirPlay Mirroring with AppleTV (3rd Gen), its not reporting any digital error with YCbCr colorspace video output:
As shown to the digital error graphs above, the AppleTV (3rd Gen) can be used from LightSpace Connect App users but not recommended from CalMAN's MobileForge users, at least by using the exact FW it's been tested.
AppleTV (3rd Gen), when its been used for SDR movie playback, it can provide a bit-perfect YCbCr 4:4:4 colorspace video output.
Using DVDO's AVLAb TPG Pixel Analyser function and streaming the MP4 files of CalMAN's ColorChecker Classic and Color Gamut chapters from Ted's LightSpace CMS Calibration Disk using AirPlay Mirroring from iPhone or direct from AppleTV via Infuse 5 Pro video player App, it had no digital error to any measured color patch.
AppleTV 4K (5th Gen) using iPhone AirPlay Mirroring with CalMAN's MobileForge has been tested also, but it had digital errors with YCbCr 4:4:4 colorspace video output:
Further testing using AppleTV 4K stopped because seems that the device adds an additional processing to the image continiously by returning fluctuating values with digital errors ranging from a theoretical minimum of 1 to a theoretical maximum of 6 per YCbCr/RGB-triplet. This means that it can't display a solid patch, each measured pixel of a solid color patch wil return different values due to that added processing the device is applying.
For that reason, AppleTV 4K is not recommended for patch generation using any supported App.
That issue has been recorded with two videos, both videos are displaying Ted's LightSpace CMS Calibration Disk MP4 Media File of CalMAN's ColorChecker Classic patches via Infuse 5 Pro App with 1080p24 YCbCr 4:4:4
Tyler Pruitt (Technical Evangelist for CalMAN) has tested AppleTV (4th Gen) using CalMAN's MobileFoge using iPhone AirPlay Mirroring and found it as bit-perfect, he has posted about this to AVSForum.com:
At this point, we can't really count to any kind of testing coming from SpectraCAL, since real digital pixel analysis by multiple sources (from professionals or home enthousiasts with reference analysers) or home users with meter measurement runs comparisons versus known references have found that using MobileForge with any supported device is not able to provide an accurate patch generation.
Problems related with Google's ChromeCast and Amazon's FireStick using CalMAN's Mobile Forge App will be explained also.
After many problems reported from any users to AVSForum related with supported devices of MobileForge App, home users who paid to buy a full license of CalMAN to be able to use MobileForge which as advertised was a bit-perfect and very low cost reference patch generation solution, Tyler Pruitt (Technical Evangelist for CalMAN) posted that they found at SpectraCAL problems also (so these problems were not there, when MobileForge developed and tested until home users find out all these issues?):
Generally we don't recommend any AppleTV device to be used a reference (bit-perfect) patch generation, even from LightSpace Connect users because there many different device generations, firmware and operating system versions and it's not easy all these to be tested properly when a new update will be released and installed.