Developer Information - Blackmagic Design HDLink Manual De Instalación Y Funcionamiento

Developer Information

Blackmagic 2K Format – Overview
The latest Blackmagic Design products use the new 3 Gb/s 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 3 Gb/s 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!
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.
The diagram, Vertical Timing Reference, shows the vertical timing details with line numbers and
Field, Vertical and Horizontal bits for the Timing Reference Signal codes.
The diagram, Data Stream Format, shows the data stream formats around the optional ancillary data
section of the horizontal line. Note that each active pixel takes up three samples.
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