HTP-1 Installation and User Guide Release 1.8.1
Video Features
The video system of the HTP-1 supports HDMI 2.0b and HDCP 2.3 on all ports. It is the job of the HDMI
“repeater” inside of the HTP-1 to pass video according to the rules of HDMI while extracting the audio
for local decoding. It has two HDMI output ports that output the same content, so the current HDMI
input video content is sent to both output ports. During normal operation, audio is extracted and not
passed through. Selecting a non-video input (audio-only input) will leave the current HDMI input
selected to continue to pass video but the HTP-1 will render audio from the selected audio source.
At system startup (cold start, not the quick start), there will be no video passed through the HTP-1 until
the HTP-1 control system is up and running.
The current video status can be found on the
info
screen (blue circle i) next to the label “video status:."
Optionally, the video status can be displayed on the bottom of the Home page by enabling its display
from the System settings page. Just check the box next to “Display Video Status on Home Page:."
UHD Support
By default, all HDMI inputs have Ultra High Definition (UHD) support enabled. There are some legacy
(older) devices that may have problems with the HTP-1 indicating support for UHD. A problematic
source device might be identified by seeing discolored video on the TV all the time, horrible looking
video on the TV all the time, never getting audio from the source all the time, etc. On the
INPUTS
tab of
the
Web GUI Home Page
there is a switch setting for every HDMI input titled “UHD Capable." Setting a
switch to the off position will remove information from the EDID that can cause problems for these
legacy devices. In technical terms, the HDMI Forum Vendor Specific Data Block is removed along with
video timing formats defined in HDMI 2.0 that are found in the Short Video Descriptor block.
This change in the EDID takes effect immediately upon changing the setting on the Inputs page. There
will be a momentary disruption in the video passing to the TV while the EDIDs are being reconfigured.
EDID Management
The HTP-1 will read and parse the downstream EDIDs and populate an internal data structure with the
capabilities of each display device connected to the 2 output ports. It then creates a combined EDID
from this data to present to upstream devices (devices connected to the HDMI inputs). The EDIDs are
created with a logical AND approach, meaning that both downstream devices must support a capability
in order for that capability to be enabled in the upstream EDID.
At startup of the HTP-1 (cold start, not the quick start), the EDIDs will not be made available to the
upstream devices until the control system is up and running and can load the audio descriptors with the
correct audio support. After this is completed, the EDID will be presented to the upstream devices.
Turning off a downstream device will NOT result in its EDID capabilities being removed from the
“combined” EDID that is created and presented to upstream devices. In order for HTP-1 to “forget” an
output port EDID, the HDMI cable must be disconnected from the output port and the HTP-1 power
cycled (full power cycle, not the quick start).
HTP-1 User Manual
Page 86
V1.8.1
