Editing Serial digital interface (section)

===Other interfaces===
SMPTE 297-2006 defines an optical fiber system for transmitting bit-serial digital signals It is intended for transmitting SMPTE ST 259 signals (143 through 360&nbsp;Mbit/s), SMPTE ST 344 signals (540&nbsp;Mbit/s), SMPTE ST 292-1/-2 signals (1.485&nbsp;Gbit/s and 1.485/1.001&nbsp;Gbit/s) and SMPTE ST 424 signals (2.970&nbsp;Gbit/s and 2.970/1.001&nbsp;Gbit/s). In addition to optical specification, ST 297 also mandates laser safety testing and that all optical interfaces are labelled to indicate safety compliance, application and interoperability.<ref>{{Cite web|url=https://www.smpte.org/sites/default/files/2013-09-10-3GSDI-Hudson-V3-Full.pdf|title=3Gb/s SDI for Transport of 1080p50/60, 3D, UHDTV1 / 4k and Beyond|last=SMPTE|date=2013|access-date=2017-03-17|archive-date=2016-03-03|archive-url=https://web.archive.org/web/20160303225904/https://www.smpte.org/sites/default/files/2013-09-10-3GSDI-Hudson-V3-Full.pdf|url-status=dead}}</ref>

An 8-bit parallel digital interface is defined by [[Rec. 601|ITU-R Rec. 601]]; this is obsolete (however, many clauses in the various standards accommodate the possibility of an 8-bit interface).