RECOMMENDATION ITU-R BT.1381-1 - Serial digital interface-based transport interface for compressed television signals ...
ANNEX 1 - SDI-based transport interface for compressed television signals in networked television production
1 Introduction
2 Normative references
3 General specifications
4 Header data
    4.1 Ancillary data formatting
    4.2 Line number
    4.3 Line number CRC
    4.4 Code and AAI
    4.5 Destination and source address
    4.6 Block type
    4.7 Payload CRC flag
    4.8 Header expansion reserved data
    4.9 Header CRC
5 User data signal format
    5.1 Data block
    5.2 Data block header
    5.3 Payload CRC
6 Error detection and handling (EDH)
7 Code, AAI, block type, data type registrations