User's Manual

This information includes everything product developers need to know for building native
2KSDI equipment. Of course, all Blackmagic products can be updated, so if the television
industry adopts an alternative SDI-based film standard, we can add support for that too!
Frame Structure
 Transmitted at 23.98, 24 or 25 frames per second as a Progressive Segmented Frame.
 Active video is 2048 pixels wide by 1556 lines deep.
 Total lines per frame : 1650
 Active words per line are 1535. One word consists of a 10-bit sample for each of the
four data streams, i.e., a total of 40 bits. See the diagram named Blackmagic 2K Format
- Data Stream Format.
 Total active lines : 1556
 Total words per line : 1875 for 23.98/24Hz and 1800 for 25Hz.
 Fields per frame : 2, 825 lines each
 Active lines located on lines 16-793 (field 1) and 841-1618 (field 2).
Transport Structure
 Based on SMPTE 372M Dual Link mapping and SMPTE 425M-B support for mapping
SMPTE 372M into a single 3 Gb/s link.
 Timing reference signals, line number and line CRC insertion is the same as above.
 During active video, 10-bit Red, Green and Blue data is sent in the following sequence:
 Optional ancillary data is inserted into both virtual interfaces.
 At present, only audio data is included: as per standard HD audio insertion (SMPTE
S299M) the audio data packets are carried on data stream two and audio control
packets are carried on data stream one.
 Data stream 1: Green_1, Green_2, Green_3, Green_5...Green_2047
 Data stream 2: Blue_1, Blue_2, Green_4, Blue_5...Green_2048.
 Data stream 3: Red_1, Blue_3, Blue_4, Red_5...Blue_2048.
 Data stream 4: Red_2, Red_3, Red_4, Red_6...Red_2048.
Blackmagic 2K Format – Vertical Timing Reference
This diagram shows the vertical timing details with line numbers and Field, Vertical and
Horizontal bits for the Timing Reference Signal codes.
Field 1 Active
F 1 0 0 0 0 0 0 0 0 0 0 0
V 1 1 1 1 1 1 0 0 0 0 1 1
LINE # 1650 1 2 ... 14 15 16 ... 792 793 ... 825
Field 2 Active
F 0 1 1 1 1 1 1 1 1 1 1 1
V 1 1 1 1 1 1 0 0 0 0 1 1
LINE # 825 826 827 ... 839 840 841 ... 1617 1618 ... 1650
31Developer Information