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Display Interfacing and SuperMHL

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Aaron Star
Display Interfacing and SuperMHL
on Dec 27, 2016 at 12:15:32 am

More of an FYI post.

I compiled an abbreviated list from Wiki, Vesa, and press release articles, of display interfacing details. This after reading an article on SuperMHL 1.0. It is important to know what is possible with your current GPU to monitor cable interface. If you are expecting 1080P@60FPS, or 4K60P and you are using the wrong interface, it will never happen. Your monitor display capability needs to match your GPU port capability.

The GPU manufacturers also seem to downplay the interface standards in marketing and specs sheets. The AMD GPUs seem to lack support of HDMI 2.0 interfacing except on the latest RX series. Until one understands that a dongle adapter is need to convert DP to HDMI2.0. Then you realize AMD actually supported HDMI 2.0 as far back as HD5700 days.

After reading through the list, most will conclude that interfacing Display Port is the preferred method due to the superior bandwidths.

The GPU to monitor interface standards can be a good tell as to the quality and performance of the GPU.

Most of the Deep color information has to do with whether the display driver will support it. DVD playback applications interface hardware directly and may support color standards and audio formats that Vegas may not. 10-bit+ color in Vegas may require pro video hardware like FirePro, or specialized hardware drivers that pass info beyond 8-bit. So the hardware and interface may support the mode, but the GPU driver may not, or may not allow it from the desktop windowed mode. It would be nice if Magix would post system specs, or how to's on supporting 10-bit displays or better video from Vegas.

This post was thrown together quickly and so may not be 100% accurate.

DisplayPort -

1.0 - May 2006 -- 8.64 Gbit/s data rate over a 2-meter cable

1.1 - April 2007-- same as 1.0, allows for fiber optic modes for longer distances

1.2 - Dec. 2009 -- 17.28 Gbit/s in High Bit Rate 2 (HBR2) mode, stereoscopic 3D,xvYCC, scRGB and Adobe RGB 1998, and Global Time Code (GTC) for sub 1 µs audio/video synchronization, AMD FreeSync

1.2a - Dec 2005 -- AMD GPUs - Active Adapter DisplayPort 1.2a-to-HDMI 2.0. These adapters will enable any graphics cards with DP1.2a outputs to deliver 4K@60Hz gaming on UHD televisions that support HDMI 2.0

1.3 - Sept 2014 -- 32.4 Gbit/s (25.92 with 8b/10b encoding overhead) with the new HBR3 mode featuring 8.1 Gbit/s per lane (up from 5.4 Gbit/s with HBR2 in version 1.2)

24-bit color(8bit video like AVC)
(4K UHD) 3840x2160@120Hz
(5K) - 5120x2880@60Hz
(8K UHD) 7680x4320@30hz

1.4 - Feb 2013 -- HBR3 (32.4 Gbit/s) same as 1.3, adds Error correction, HDR10 (REC2020),

display stream compression (DSC 1.0) visually lossless 3:1:
(8K UHD) 76804320@60Hz with 10-bit color and HDR
(4K UHD) 3820x2160@120Hz with 10-bit color and HDR (No DSC on)

1.4a - Feb 2015 -- HBR3 (32.4 Gbit/s) same as 1.3, adds Error correction, HDR10 (REC2020), Partial Panel Self Refresh (PSR) allows GPU to refresh only what has changed (Video preview window vs whole GUI timeline),

display stream compression (DSC 1.1) visually lossless 3:1:
(8K UHD) 76804320@60Hz with 10-bit color and HDR
(4K UHD) 3820x2160@120Hz with 10-bit color and HDR (No DSC on)


1.0 - Dec 2002 -- 3.96 Gb/s 1080p@60Hz 24bit color, and 8 channel LPCM/192 kHz/24-bit audio

1.1 - May 2004 -- 3.96 Gb/s added DVD-Audio (DVD-A) specific for 192kHz 24-bit stereo audio, or 5.1 CH at 96kHz 24-bit audio

1.2 - Aug 2005 -- 3.96 Gb/s added "Super Audio CD" mode up to 8 CH. Added PC spec to implement sRGB and YCbCr color space modes.

1.3 - June 2002 -- 10.2 Gb/s deep color, with 30-bit, 36-bit and 48-bit xvYCC, sRGB, or YCbCr modes. Added "Dolby TrueHD" DTS-HD Master Audio modes.

1.3a - Nov 10 -- clarified sRGB video quantization range, more audio stream mode improvements
§ ATI Radeon HD 5000 series

1.3b to c - Mar 2007-2008 -- HDMI compliance changes, and HDMI type C connector.

1.4 - May 2008 -- 10.2 Gb/s deep color (HD), (TRU 4K/Digital Cinema) 4096x2160@24Hz, (4K UHD) 3840x2160@24/30Hz 24-bit color, added:
§ HDMI Ethernet Channel 100Mb/s (HEC)
§ Audio Return Channel (ARC)
§ 3D formats
§ Micro HDMI Connector
§ AMD Radeon HD 6000 Series

1.4a - March 2010 -- additional 3D Format

1.4b - Oct 2011 -- 3D 1080P@120Hz or 1080@60P FPS
§ AMD Radeon HD 7000 Series
§ AMD R9-290x
§ AMD Fury-X

2.0 - 18 Gb/s --(TRU 4K/Digital Cinema) 4096x2160@24Hz, (4K UHD 60P) 3840x2160@60Hz 24-bit color, added REC 2020 Color Space / Deep color HD modes, added:
§ 32 CH 1536kHz-24bit PCM audio
§ Dual video streams on the same screen
§ 25P 3D formats
§ HE-AAC and DRA audio standards
§ AMD GPUs - Active Adapter DisplayPort 1.2a-to-HDMI 2.0. These adapters will enable any graphics cards with DP1.2a outputs to deliver 4K@60Hz gaming on UHD televisions that support HDMI 2.0

2.0a - april 2005 -- 18 Gb/s added HDR Video

2.0b - March 2016 -- 18 Gb/s added HDR10 standard and Hybrid Log-gamma (HLG)
§ GeForce GTX 1080(GP104 GPU)
§ AMD Polaris / RX series

2.1 - Unknown date -- ? Gb/s support for HDR with Dynamic Metadata


1.0 - 2.0 - Jan 2008 -- 1080P uncompressed, 8 Channels PCM Audio, HDCP 1.0

3.0 - Aug 2013 -- (4K UHD) 3840x2160@30Hz, Multiple Displays, HDCP 2.2

4.0 - SUPER MHL 1.0:
"Delivery of up to 8K 120fps video Deep Color support up to 48-bit color depths Wider color gamut to view content the way filmmakers intended High-Dynamic Range (HDR) support to strike the perfect balance of bright spectral highlights along with shadow details Immersive surround sound with support for object audio such as Dolby Atmos®, DTS-UHD™, 3D audio, and an audio-only mode Advanced connectivity configurations to link multiple MHL devices together (TV, AVR, Blu-ray player) and control them via one remote Power charging up to 40W Content on multiple displays when connecting a single device New reversible superMHL connector New support for the MHL Alt Mode for the USB Type-C specification" ~androidcentral


Display Stream Compression 1.1 - allows for 108Gb/s visually lossless data(not mathematically lossless) streams.

Since 8K@120FPS@48bit color is supported, all major color spaces, resolutions, and FPS below that are supported.

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Dave Haynie
Re: Display Interfacing and SuperMHL
on Jan 10, 2017 at 4:54:37 am

NIce list!

But you also need to know your GPU's capabilities. You can put a DisplayPort to HDMI 2.0 converter on an older GPU board, but it's likely limited by the GPU's display hardware to 2560x1600 or so resolutions. Many of today's GPUs support 4K displays but won't handle 8K... not that I'm personally too worried about moving to 8K anytime soon. And yet, 4K hit much. much faster than I had expected, mostly due to the manufacturing costs on 4K LCDs not being substantially higher than those of 2K LCDs.

It's the typical "weakest link" thing... something is going to set your boundaries. Could be the interconnect, could be the GPU... could even be the OS. For example, last I checked, MacOS didn't support DisplayPort's Multi-Stream protocol (the thing that lets you split a single DisplayPort into multiple DisplayPorts, or lets you "daisy-chain" DisplayPort monitors.


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