Developer Information
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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.
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.
During active video, 10-bit Red, Green and Blue data is sent in the following sequence:
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 – Overview
The latest Blackmagic Design products use the new
3G-SDI video, which allows twice the data rate of
traditional HD-SDI video. We thought it would be
a really nice idea to add 2K film support, via this new
3G-SDI technology, so we could simplify feature film
workflows. With the popularity of Blackmagic Design
editing systems worldwide, now thousands of people
can benefit from a feature film workflow revolution.
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!
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