SDI


Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.

SDI

(library)

SDI

(programming)

SDI

(1) See software-defined infrastructure, Single Document Interface, Strategic Defense Initiative and Switched Digital International.

(2) (Serial Digital Interface) SDI is a unidirectional video interface. Standardized by SMPTE in the late 1980s, SDI has been the primary interface for transmitting uncompressed digital video signals. SDI will eventually be replaced by IP-based NDI, and the many cables used in broadcasting facilities will be replaced with an Ethernet topography. See NDI.

SDI uses a high grade of coaxial cable and a BNC connector with Teflon insulation. It also supports optical fibers with ST, SC and FC connectors. Following are the common formats transmitted over SDI. See ITU-R BT.601, BNC connector, fiber-optic connectors and serial interface.
SD-SDI                  Aspect  Transfer(Standard Definition)   Ratio   Rate
 Digitized NTSC (4FSC)    4:3    143 Mbps
 Digitized PAL (4FSC)     4:3    177 Mbps
 Component ITU-R BT.601   4:3    270 Mbps
 Component ITU-R BT.601  16:9    360 Mbps

 HD-SDI (High Definition)  See  HD-SDI.
 Component ITU-R BT.709  16:9  1,485 Mbps
 Dual-link (two cables)        2,970 Mbps

 3G-SDI (3 Gbps)
 One-cable version of HD-SDI   2,970 Mbps



Blackmagic SDI Capture Board
Two sockets are input, and two are output. At 4:2:2 color sampling, SDI uses one line for in or out. However, HD-SDI at 4:4:4 requires two lines. See chroma subsampling. (Image courtesy of Blackmagic Design Pty. Ltd, www.blackmagicdesign.com)
References in periodicals archive ?
Many years ago, at the advent of the transition from analogue to SDI, I remember what life was like for many of my colleagues.
They included the national SDI policy coordinator, an initiator of early SDI development, a key technical SDI coordinator, a representative from data providers, a regional SDI coordinator, and an SDI research coordinator.
Another product that's now available within the AAS Technology line of HD CCTV SDI products is the SD/HD/3G-SDI 1x2 Distribution Amplifier & Extender.
This new converter will allow the four HD-SDI links to be connected to an HDMI 4K device, and will also handle the new Dual Link 3 Gb/s SDI 4K connections built into the new UltraStudio 4K and DeckLink 4K Extreme capture and playback products from Blackmagic Design.
In the past year alone, SDI has been recognized repeatedly for its dedication to customer service and community involvement.
In October of that year, SDI was fined a total of $8,150 for four violations: allowing the humidity in a work area to drop below 20 percent, which can cause static electricity; not having enough space between work stations to guard against one incident spreading to another area; not having the appropriate tools for the type of materials being handled; and for not having the proper notations that hazardous materials were in use, Fryer said.
Responding to the OTA report, the SDIO says its analyses and recent experiments indicate each stage of SDI "could operate effectively," even in the face of Soviet countermeasures such as direct attacks on the system.
First of all, SDI does not resemble a simple shield; it is a group of technologies, in some cases merely vague theories, that would rely on lasers, particle beams, and supercomputers to track and shoot down Soviet missiles.
UltraStudio SDI is a small compact design that fits right into your hand
The Blackmagic SDI Control Protocol uses the blanking space in an SDI data stream to send commands for things such as camera and lens control, color correction, program return, tally, talkback and more over SDI cables so customers don't have to to deploy additional, expensive equipment and run extra cables.
The new plant will also house the SDI aerospace division that manufactures explosive charges for tactical missile systems, spacecraft launch vehicles, and military aircraft crew-ejection systems.
An announcement by the pro-SDI Scienceand Engineering Committee for a Secure World, chaired by physicist Frederick Seitz, president emeritus of Rockefeller University in New York City, says the APS report was written before the administration decided to use a present-day technology called kinetic-energy weapons (KEW) as a starter in an evolutionary SDI scheme.