EDID management on MHUB PRO systems

The PRO range of MHUB systems offer advanced EDID management from within MHUB-OS and from the units front panel. EDID management is an important facet of installing a whole home AV system, and improper configuration will result in a system that doesn’t operate at full capabilities. More and more source devices are limiting there selectable output resolutions based on the EDID they read from the display, as such you may find without proper EDID management that your devices won’t offer you the display resolutions and audio formats you want.

EDID (Extended Display Information Data) data exchange is a standardized means for a display to communicate its capabilities to a source device. The premise of this communications is for the display to relay its operational characteristics, such as its native resolution, to the attached source, and then allow the source to generate the necessary video characteristics to match the needs of the display. This maximizes the functional compatibility between devices without requiring a user to configure them manually, thus reducing the potential for incorrect settings and adjustments that could compromise the quality of the displayed images and overall reliability of the system.

EDID information looks something like this:

(20) Video Input Definition: Analog
0.700, 0.000 (0.700 V p-p)
Separate Syncs, Composite Syncs, Syncs on Green

(21) Maximum Horizontal Image Size: 62 cm
(22) Maximum Vertical Image Size : 34 cm
(23) Display Gamma : 2.20
(24) Power Management and Supported Feature(s):
Active Off/Very Low Power, RGB Color, Non-sRGB, Preferred Timing Mode

(25-34) Color Characteristics
Red Chromaticity : Rx = 0.626 Ry = 0.337
Green Chromaticity : Gx = 0.306 Gy = 0.626
Blue Chromaticity : Bx = 0.156 By = 0.057
Default White Point: Wx = 0.313 Wy = 0.329

(35) Established Timings I

720 x 400 @ 70Hz (IBM, VGA)
640 x 480 @ 60Hz (IBM, VGA)
640 x 480 @ 67Hz (Apple, Mac II)
640 x 480 @ 72Hz (VESA)
640 x 480 @ 75Hz (VESA)
800 x 600 @ 60Hz (VESA)

(36) Established Timings II

800 x 600 @ 75Hz (VESA)
1024 x 768 @ 60Hz (VESA)
1024 x 768 @ 75Hz (VESA)
1280 x 1024 @ 75Hz (VESA)

(37) Manufacturer’s Timings (Not Used)

(38-53) Standard Timings

1920×1080 @ 60 Hz (16:9 Aspect Ratio)
1280×1024 @ 60 Hz (5:4 Aspect Ratio)
1280×960 @ 60 Hz (4:3 Aspect Ratio)
1440×900 @ 75 Hz (16:10 Aspect Ratio)
1440×900 @ 60 Hz (16:10 Aspect Ratio)
1680×1050 @ 60 Hz (16:10 Aspect Ratio)
1280×720 @ 60 Hz (16:9 Aspect Ratio)

However, this becomes much more complicated in situations with multiple displays such as a splitter or a video matrix, this is because the device in question must now decide on a single EDID to present to a source device from the available displays. Normally this will be the lowest common denominator, which is ok for initial setup as it will guarantee you have video/audio in all locations.

Image to be added

However, this may not be the desired result long term. This is where EDID management becomes important. EDID management is the process by which you manually select the EDID you wish to be presented to each individual source device, this ensures you get the desired Video/Audio output from each connected source device and utilise your system to the maximum of its capabilities.

This menu can be accessed via the AV Settings menu in MHUB-OS

Edid 1

This menu contains 2 main types of EDID, Pre-Defined EDIDS such as

4K2K60, Stereo Audio 2.0, HDR

This would present a source device with a ‘display’ capable of 4K video with HDR enabled and 2.0 channel audio. Alternatively, MHUB-OS has the ability to copy an EDID from a connected display. Currently, this is only possible via the HDMI mirror ports. This will make the connected source devices behave as if they are only connected to the chosen copied output.