Bandwidth Limitation; The Difference Between The Scaler And The Frc - Example - Lightware UBEX-PRO20-HDMI-F100 User Manual

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5. UBEX Concept 5. UBEX Concept
5.1.7. Bandwidth Limitation
The UBEX endpoints can transmit two video streams at the same time up to 20 Gbps bandwidth. When the
bandwidth limit is exceeded, the priority of the streams is the following:
Transmitter Side
The stream of the HDMI in 1 has the higher priority and the stream of the HDMI in 2 will not be transmitted
until the bandwidth limit problem is solved (the parameters of the video is still received by the receiver). In
that case the stream tile of the disabled stream become amber in the LDC software.
Transmitter side
Receiver Side
The switched stream of the HDMI out 1 has the higher priority and the stream of the HDMI out 2 is going to
be disabled (the parameters of the video is still received). In that case the stream tile of the disabled stream
become amber in the LDC software.
Receiver side
Transceiver Side
Thanks to the 20G full-duplex SFP+ interface the transceiver has no bandwidth limitation on the input and
output sides either. The device is able to receive and transmit 2x 4K60 Hz 4:4:4 24bit streams on both HDMI
ports.
Transceiver side
INFO:
You can find the bandwidth requirements belong to each resolutions in the
the Resolutions section.
HDMI in 1 HDMI in 2
Status Stream tile (LDC) Status Stream tile (LDC)
Enabled Disabled
Stream 1
HDMI out 1 HDMI out 2
Status Stream tile (LDC) Status Stream tile (LDC)
Enabled Disabled
Stream 1
HDMI in 2 HDMI out 1
Status Stream tile (LDC) Status Stream tile (LDC)
Enabled Enabled
Stream 1
Required Bandwidth of
Applied F-series endpoint firmware package: v2.0.0 | Applied R-series endpoint firmware package: v2.0.0 | LDC software: v2.5.9b3
series – Extender Application Mode – User's Manual series – Extender Application Mode – User's Manual
5.1.8. The Difference between the Scaler and the FRC - Example
The following example helps to understand how works the scaler and the frame rate converter and describes
the differences between them.
Example for Downscaling
Stream 2
When the resolution of the stream is bigger than the supported resolution of the sink devices:
HDMI out 1: set the scaler for the supported resolution to fit the stream to the sink device.
▪
▪ HDMI out 2: the frame rate converter crops the center part with 1080p resolution from the picture.
Example for Upscaling
Stream 2
Stream 1 When the resolution of the stream is smaller than the supported resolution of the sink devices:
HDMI out 1: set the scaler for the supported resolution and it fits the stream for the sink device.
▪
▪ HDMI out 2: the frame rate converter fills the extra image part with black pixels.
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