Editing Serial digital interface (section)

==Related interfaces==
In addition to the regular serial digital interface described here, there are several other similar interfaces which are similar to, or are contained within, a serial digital interface.

===SDTI===
{{Main|Serial Data Transport Interface}}
There is an expanded specification called SDTI (''Serial Data Transport Interface''), which allows compressed (i.e. [[DV (video format)|DV]], [[MPEG]] and others) video streams to be transported over an SDI line. This allows for multiple video streams in one cable or faster-than-realtime (2x, 4x,...) video transmission. A related standard, known as HD-SDTI, provides similar capability over an SMPTE 292M interface.

The SDTI interface is specified by SMPTE 305M. The HD-SDTI interface is specified by SMPTE 348M.

=== ASI ===
{{main |Asynchronous serial interface}}
The asynchronous serial interface (ASI) specification describes how to transport a MPEG Transport Stream (MPEG-TS), containing multiple MPEG video streams, over 75-ohm copper coaxial cable or multi-mode optical fiber.
ASI is popular way to transport broadcast programs from the studio to the final transmission equipment before it reaches viewers sitting at home.

The ASI standard is part of the [[Digital Video Broadcasting]] (DVB) standard.

===SMPTE 349M===
The standard ''SMPTE 349M: Transport of Alternate Source Image Formats through SMPTE 292M'', specifies a means to encapsulate non-standard and lower-bitrate video formats within an HD-SDI interface. This standard allows, for example, several independent standard-definition video signals to be multiplexed onto an HD-SDI interface and transmitted down one wire. This standard doesn't merely adjust EAV and SAV timing to meet the requirements of the lower-bitrate formats; instead, it provides a means by which an entire SDI format (including synchronization words, ancillary data, and video payload) can be ''encapsulated'' and transmitted as ordinary data payload within a 292M stream.

===HDMI===
[[File:HDMI to SDI Converter.jpg|thumb|[[HDMI]] to SDI converter]]

The [[HDMI]] interface is a compact audio/video interface for transferring [[uncompressed video]] data and compressed/uncompressed digital [[Uncompressed audio|audio]] data from an HDMI-compliant device to a compatible [[visual display unit|computer monitor]], [[video projector]], [[digital television]], or [[digital audio]] device. It is mainly used in the consumer area, but increasingly used in professional devices including uncompressed video, often called [[clean HDMI]].

===G.703===
The [[G.703]] standard is another high-speed digital interface, originally designed for telephony.

===HDcctv===
The [[HDcctv]] standard embodies the adaptation of SDI for video surveillance applications, not to be confused with TDI, a similar but different format for video surveillance cameras.

===CoaXPress===
The [[CoaXPress]] standard is another high-speed digital interface, originally designed for use with industrial cameras. The data rates for CoaXPress go up to 12.5&nbsp;Gbit/s over a single coaxial cable. A 41&nbsp;Mbit/s uplink channel and power over coax are also included in the standard.