{{short description|Serial digital interface for video transport}} '''SMPTE 259M''' is a standard published by SMPTE which "describes a 10-bit serial digital interface operating at 143/270/360&nbsp;Mb/s."<ref name="SMPTE 259M">{{Cite book | doi = 10.5594/S9781614824077| title = ST 259:2008 : For Television — SDTV1 Digital Signal/Data — Serial Digital Interface| journal = St 259:2008| year = 2008| pages = 1–18| isbn = 978-1-61482-407-7}}</ref>

The goal of SMPTE 259M is to define a serial digital interface (based on a coaxial cable), called SDI or '''SD-SDI'''.

There are 4 bit rates defined, which are normally used to transfer the following standard video formats: {|class="wikitable" !Variant !Bit rate !Aspect ratio !Total lines (per frame) !Active pixels (per line) !Active lines !Frame rate |- |SMPTE 259M-A |{{no wrap|143 Mbit/s}} |4:3 |525 |768 |486 |59.94i |- |SMPTE 259M-B |{{no wrap|177 Mbit/s}} |4:3 |625 |948 |576 |50i |- |SMPTE 259M-C |{{no wrap|270 Mbit/s}} |4:3 or 16:9 |525 |720 |486 |59.94i |- |SMPTE 259M-C |{{no wrap|270 Mbit/s}} |4:3 or 16:9 |625 |720 |576 |50i |- |SMPTE 259M-D |{{no wrap|360 Mbit/s}} |16:9 |525 |960 |486 |59.94i |}

==References== {{reflist}}

{{SMPTE standards}}

Category:Film and video technology Category:SMPTE standards

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