Hdmi Signal Transmission - Example For Trx-Trx Pair; Timing Modes - Lightware UBEX-PRO20-HDMI-F110 User Manual

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4. UBEX Concept 4. UBEX Concept
Scaling Options
If the stream of the 4K laptop is switched to the HD monitor on the HDMI out 1, it cannot display the high-
resolution video. The solution is the stream transmitted on the HDMI out 1 can be scaled for the sink device
which supports lower resolutions only. For example the 4K60 video is scaled to 1080p60 and the stream can
be displayed on the HD monitor as well.
The scaler is available on the receiver and transmitter side either. The stream of the HDMI in 1 can be re-
scaled and the transmitter transmits the optimized stream toward the receiver.
ATTENTION!
The local outputs of the transmitter always display the received original video streams and
cannot be scaled.
Lightware Device Controller (LDC)
The crosspoint settings are available in LCD menu of the device (see the details in the
2 Ports section) and in LDC software (see the details in the
4.1.5. HDMI Signal Transmission - Example for TRX-TRX Pair
The Concept
Two source devices are installed in the system: a 4K laptop connected the TRX #1, and a HD laptop connected
to the TRX #2. The stream of the 4K laptop is sent to the HDMI out 1 port of the TRX #2 (4K TV) and also
transmitted to the local output port of the TRX #1 (Local 4K TV). The stream of the HD laptop is sent to the
HDMI out 1 port of the TRX #1 (HD monitor) and also transmitted to the local output port of the TRX #2
(Local HD monitor).
UBEX series – Extender Application Mode – User's Manual UBEX series – Extender Application Mode – User's Manual
RX HDMI Output 1 and
Video Crosspoint Menu section).
Applied F-series endpoint firmware package: v1.4.1 | Applied R-series endpoint firmware package: v1.4.1 | LDC software: v1.34.0b2
Available HDMI Signal Routing
Transceiver #1
HDMI out 1
HD monitor
HDMI in 2
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4K laptop
HDMI in 2
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HD laptop
Explanation
The input of the Transceiver #1 is displayed on the local HDMI output (HDMI out 2) and the output of the
Transceiver #2 (HDMI out 1), and the input of the Transceiver #2 is displayed on the local HDMI output
(HDMI out 2) and the output of the Transceiver #1 (HDMI out 1).
4.1.6. Timing Modes
Technical Background
UBEX receivers and transceivers provide two different timing modes on the HDMI outputs:
▪ Free run: the receiver generates nominal clock frequency which is not bonded to the source. It means
TBC (time base correction) is applied in the stream which may cause frame repetition/drop between
minimum 1 and maximum 2 frames value. The seamless stream switching is available in this mode
only.
▪ Source locked: time stamps are transmitted with the stream from the source and the receiver can
generate accurate clock frequency; in this way the latency within one frame (up to 16 lines) can be
guaranteed. This mode is ideal for the video walls where the extra low latency is the most important
requirement.
The setting is available in the LDC software (see the details in the
section) and by LW3 protocol commands (see the details in the
Destinations
Transceiver #2
HDMI out 2 HDMI out 1 HDMI out 2
Local 4K TV 4K TV Local HD monitor
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HDMI Output Ports (RX/TRX Modes)
Timing Mode Setting section).
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