Video And Audio Interface; Output Conversion Modes; Autoselect Feature - Lightware HDMI20-OPTC-TX220-Pro User Manual

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3. Product Overview
3.6. Video and Audio Interface
The HDMI20-OPTC series transmitter can receive signal from two types of sources:
▪ DVI-D
▪ HDMI (with embedded audio)
The HDMI20-OPTC series receiver can output HDMI video signal (with embedded audio).
Port Diagram of Video and Audio Interface
HDMI20-OPTC-TX220-Pro
INPUT 1
HDMI Splitter
INPUT 2
Transmitter Side
The video signal is received at the Input 1 or the Input 2. The HDMI splitter duplicates the signal and sends
the same HDMI stream to the local HDMI output and the fiber output.
Receiver Side
The video and the embedded audio signal arrives via optical cable into the HDMI splitter. It duplicates HDMI
stream and transmits the signal without modifying it to the HDMI Out 2 port. The HDMI splitter transmits the
same signal into the video converter where three output conversion modes can be set.
3.6.1. Output Conversion Modes
In Transparent mode (no conversion mode), the video signal is transmitted to the HDMI Output 1A and the
HDMI Output 1B without any changing.
INFO: Maximal data transmission capacity of Output 1B is 9 Gbps, so the video signal is above, there will
be no picture on the display.
Split mode means splitting of the original video signal into left and right halves and sending the split signal to
the HDMI Output 1A and the HDMI Output 1B.
In Downsample convert mode (convert to YCbCr 4:2:0) the video converter subsamples the 4:4:4 signal to 4:2:0
on the 1A and 1B Output port.
This function is also available via front panel's menu, Lightware Device Contoller (LDC) software and LW3
commands.
HDMI20-OPTC-RX220-Pro
Fiber OUT Fiber IN
HDMI Splitter
B B
A A
Video converter
OUTPUT 2.
Transparent
Split
Downsample
HDMI20-OPTC series – User's Manual
3.6.2. Autoselect Feature
Besides manual crosspoint selection you can
choose the Autoselect option on the video
ports. There are three types of Autoselect as
follows:
First detect mode: selected input port is
▪
kept connected to the output while it
has an active signal
Priority detect mode: always the highest
▪
priority active input is selected to
transmit.
OUTPUT 2
Last detect mode: always the last attached
▪
input is selected to transmit.
OUTPUT 1A
OUTPUT 1B
Video Interface - Example
Event master
The Concept
The HDMI signal with embedded audio comes from the Event master to Input 1. The other source is a PC,
which sends DVI-D signal to Input 2. Both of them are connected to the transmitter, where the autoselect
mode is enabled with priority 0 on the Input 1, so the Input 1 is selected.
INFO: Only one input can be selected at the same time.
First detect
Selected
N
port still has a
valid signal?
Y
Remains
selected
HDMI IN DVI-D IN
PC
OPTC OUT OPTC IN
MAIN MENU
HDMI20
> System Settings
Ports OPTC
EDID
Health
USB Remote
CONTROL
220-PRO
HDMI20-OPTC-TX220-Pro
HDMI 2.0 Multimode Fiber Transmitter
HDMI20-OPTC-TX220-Pro HDMI20-OPTC-RX220-Pro
16
N
New event?
Y
Current
Last detect
Autoselect mode
Last connected
input is selected
Priority detect
Port with
Y Port with priority
priority 0 has a
0 is selected
valid signal?
N
Port with
Port with priority
Y
priority 1 has a
1 is selected
valid signal?
N
No Audio/Video
transmission
HDMI OUT
Projector
HDMI20
OPTC
USB
CONTROL
220-PRO
HDMI20-OPTC-RX220-Pro
HDMI 2.0 Multimode Fiber Receiver