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HDCP
The DTP T SW4 HD 4K switcher acts as an HDCP and HDMI repeater by actively handling
HDCP key negotiation and authentication on the inputs and the output. However, it does not
report itself as a repeater or forward a KSV list. The switcher supports HDCP output mode.
Input
The HDMI input negotiates and authenticates HDCP with the source device if the source
requires HDCP encryption. The authentication process is repeated whenever the stored
EDID is changed or updated, which is indicated by pulling HPD low.
HDCP support can be disabled using SIS command (see
page 44) or PCS (see
Output
The output is pre-authenticated and encrypted, in accordance with the configured HDCP
output mode. If the output requires encryption but the connected sink device cannot be
authenticated, the output displays a green screen.
HDCP output modes
•
•
•
•
TMDS output format
The TMDS output format has three components:
•
•
•
By default, the input format is configured for Auto, which automatically forces RGB 4:4:4
Full, with the video format dependent on the source signal and the sink capabilities. Use SIS
commands or PCS to force the output format (see
Output Configuration Panel
Color depth and deep color support
The options are:
•
•
This can also be disabled or changed via SIS commands or PCS (see
Depth
Input Configuration Panel
Follow input — Output is always authenticated but only encrypted when required by
input. HDMI authentication is continuous. DVI authentication occurs for a maximum of
10 seconds, then fails. This is the default mode.
Always encrypt output — Output is always authenticated and encrypted. HDMI
authentication is continuous. DVI authentication occurs for a maximum of 10 seconds,
then fails.
Follow Input (with continuous DVI trials) — Output is always authenticated but only
encrypted when required by input. Both HDMI and DVI authentication are continuous.
Always encrypt output (with continuous DVI trials) — Output is always
authenticated and encrypted. Both HDMI and DVI authentication are continuous.
Video format — either DVI or HDMI
Color space — RGB 4:4:4, YCbCr 4:2:2, or YUV 4:4:4
Quantization range — either full (0-255) or limited (16-235)
on page 31)
Automatic — The DTP T SW4 HD 4K switcher determines the best color depth
supported by the sink by monitoring the EDID of the sink.
Force 8‑bit
on page 43 or
Output Configuration Panel
HDCP Input Authorization
on page 31).
TMDS Output Format
on page 44 or
Video Color Bit
on page 31).
DTP T SW4 HD 4K • Operation
on
28
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