Bandwidth Limitation; The Difference Between The Scaler And The Frc - Example - Lightware UBEX-MMU-X200 User Manual

 
     
6. UBEX Concept 6. UBEX Concept
6.3.4. Bandwidth Limitation
Two video streams can be transmitted at the same time from an endpoint device 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 becomes amber in the LDC software.
Status
Transmitter side
Enabled
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
becomes amber in the LDC software.
Status
Receiver side
Enabled
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 the HDMI
input and output ports either.
Status
Transceiver side
Enabled

INFO: You can find the bandwidth requirements belong to each resolutions in the
the Resolutions section.
Applied F-series endpoint firmware package: v1.5.4 | Applied R-series endpoint firmware package: v1.5.4 | Applied MMU firmware package: v1.3.3 | LDC software: v2.4.2b4
HDMI in 1 HDMI in 2
Stream tile Port tile Stream tile
Status
(LDC) (LDC) (LDC)
Disabled
1/01
HDMI out 1 HDMI out 2
Stream tile Port tile Stream tile
Status
(LDC) (LDC) (LDC)
Disabled
1/01
HDMI in 2 HDMI out 1
Stream tile Port tile Stream tile
Status
(LDC) (LDC) (LDC)
Enabled
1/02
Required Bandwidth of
series – Matrix Application Mode – User's Manual series – Matrix Application Mode – User's Manual
6.3.5. The Difference between the Scaler and the FRC - Example
The following example helps to understand how the scaler and the frame rate converter work and describes
the differences between them.
Example for Downscaling
Port tile
(LDC)
1/02
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
Port tile
(LDC)
1/02
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.
▪
Port tile
▪ HDMI out 2: the frame rate converter fills the extra image part with black pixels.
(LDC)
1/01
64 64