The UHD-SDI audio-video loopback example design is built using the UHD-SDI TX and RX subsystems along with the UHD-SDI Audio IP core. Video data generated by the video test pattern generator is passed to the UHD-SDI TX Subsystem. The UHD-SDI TX Subsystem outputs SDI stream after insertion of the ST352 payload (if any) and passed to the UHD-SDI Audio (Embed) IP for audio data insertion. To do so, bit 18 ( use_anc_in ) of sdi_tx_ctrl[31:0] has to be set to 1’b1 in the UHD-SDI TX Subsystem. Audio data is generated by the audio test pattern generator. See Appendix C to for more information on the audio test pattern generator. Native SDI video stream with audio insertion is passed to the UHD-SDI TX IP for transmission. The UHD-SDI RX Subsystem receives video and audio and passes the native video stream to the UHD-SDI Audio (Extract) IP. Audio is extracted by UHD-SDI Audio IP. The UHD-SDI TX Subsystem, UHD-SDI RX Subsystem, UHD-SDI Audio (Embed) IP, and UHD-SDI Audio (Extract) IP are configured through ports and does not include the AXI4-Lite interface for this example design. The example design application software runs on a MicroBlaze ™ processor .
Note: The MicroBlaze processor is not shown in the above figure for simplicity.