HAI 100 4K PLUS • Configuration
7
Output Compatibility Correction
EDID Minder manages the EDID stored at the HDMI input and presented to the source device.
The HAI 100 4K Plus scans and monitors the EDID of the sink device connected to the HDMI
output. It determines the interface (DVI or HDMI) and color depth, and uses that information to
adjust the signal so that it is compatible with the output device.
TMDS Output Format
The TMDS output format has three components:
•
Video format
— either DVI or HDMI
•
Color space
— RGB 4:4:4, YUV 4:2:2, or YUV 4:4:4
•
Quantization range
— either full (0-255) or limited (16-235)
To set the TMDS output format, use the TMDS SIS commands shown on
By default, the output format is configured for Auto, which automatically forces RGB 4:4:4
Full. The video format depends on the source signal and the sink capabilities.
NOTE:
When the source signal is detected as 4K/UHD @ 60Hz with YUV 4:2:0 (based
on AVI infoframe data), it passes unaltered, overriding the TMDS output format
setting. If the TMDS output format is changed while the signal is passing, the setting
is applied, but with no observable change. The TMDS output format resumes as
configured when the source signal changes to a signal other than 4K/UHD @ 60Hz
with YUV 4:2:0.
Other TMDS output formats, which can be set using the
command on page 13, include:
•
DVI RGB 4:4:4
•
HDMI RGB 4:4:4 Full
•
HDMI RGB 4:4:4 Limited
•
HDMI YUV 4:4:4 Limited
•
HDMI YUV 4:2:2 Limited
Color bit depth support
If the incoming signal uses deep color but the sink device does not support it, the color
depth is truncated to the next best color depth, as reported in the sink EDID. The options
are:
•
12-bit > 10-bit
•
12-bit > 8-bit
•
10-bit > 8-bit
This feature can be set to always force 8-bit, using the
command on page 13.
Hot Plug Detect (HPD)
The HAI 100 4K Plus monitors HPD on the HDMI output to determine if a new sink has
been connected. If necessary, the signal for that output is modified in response to the EDID
of the connected device.
