The SDI TX display pipeline is shown in This Figure.
The SMPTE UHD-SDI Transmitter Subsystem accepts AXI4 Video streams and outputs native SDI streams by using Xilinx transceivers as the physical layer.
The Video Mixer enables you to mix video layers and allows mixing up to four streaming or memory layers. Each layer can be up to 4K resolution and can perform color space conversion. The TRD design uses memory layer 1 to fetch video data.