1. SDI II Intel® FPGA IP Quick Reference
2. SDI II IP Core Overview
3. SDI II IP Core Getting Started
4. SDI II IP Core Parameters
5. SDI II IP Core Functional Description
6. SDI II IP Core Signals
7. SDI II IP Core Design Considerations
8. SDI II IP Core Testbench and Design Examples
9. SDI II Intel® FPGA IP User Guide Archives
10. Document Revision History for the SDI II Intel® FPGA IP User Guide
5.3.1. Insert Line
5.3.2. Insert/Check CRC
5.3.3. Insert Payload ID
5.3.4. Match TRS
5.3.5. Scrambler
5.3.6. TX Sample
5.3.7. Clock Enable Generator
5.3.8. RX Sample
5.3.9. Detect Video Standard
5.3.10. Detect 1 and 1/1.001 Rates
5.3.11. Transceiver Controller
5.3.12. Descrambler
5.3.13. TRS Aligner
5.3.14. 3Gb Demux
5.3.15. Extract Line
5.3.16. Extract Payload ID
5.3.17. Detect Format
5.3.18. Sync Streams
5.3.19. Convert SD Bits
5.3.20. Insert Sync Bits
5.3.21. Remove Sync Bits
5.4.1. HD-SDI Dual Link to 3G-SDI (Level B) Conversion
5.4.2. 3G-SDI (Level B) to HD-SDI Dual Link Conversion
5.4.3. SMPTE RP168 Switching Support
5.4.4. SD 20-Bit Interface for Dual/Triple Rate
5.4.5. Dynamic TX Clock Switching for Arria V, Cyclone V, and Stratix V Devices
5.4.6. Intel FPGA Video Streaming Interface
7.1.2.1. Changing RX CDR Reference Clock in Transceiver Native PHY IP Core
7.1.2.2. Merging Simplex Mode Transceiver in the Same Channel
7.1.2.3. Using Generated Reconfiguration Management for Triple and Multi Rates
7.1.2.4. Ensuring Independent RX and TX Operations in the Same Channel
7.1.2.5. Potential Routing Problem During Fitter Stage in Arria® 10 and Cyclone® 10 GX Devices
7.1.2.6. Unconstrained Clocks in SDI Multi-Rate RX Using Arria® 10 and Cyclone® 10 GX Devices
7.1.2.7. Unused Transceiver Channels
7.1.2.8. Routing Transceiver Reference Clock Pins to Core Logic in Stratix® 10 Devices
5.3.20. Insert Sync Bits
Inserting sync bits prevents long runs of 0s.
Repeating patterns of 3FF or 000h for 6G-SDI and 12G-SDI video standards in the 10-bit parallel interface may result in a long run of zeros feeding the scrambling polynomial. A long run of zeros goes up to a length of 160 "1"s and 339 "0"s, which may cause the generation of the pothole pathological condition.
To prevent long runs, this feature modifies the 10-bit parallel interface data stream. It replaces the two LSBs of repeated 3FF or 000 code words with sync-bit values of 10b for 000h words and 01b for 3FFh words.
Figure 23. Sync Bits
However, to ensure the words are synchronized and aligned in the receiver, this feature retains one complete sequence of preambles (3FFh 000h 000h) without modification.
Figure 24. Sync Bits Insertion Process