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Serial Electric Powered Interface (SDI) is a standard for transmitting digital video and audio over coaxial or fiber optic cable. The SDI standard uses 8 or 10 bit data words. SDI signals are not compressed and are automatically synchronized between the appropriate source (transmitter) and destination (receiver).

This is for the serial digital interface used in professional video. For general information about serial ports, see the Serial Communication section.

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SDI

What resolution is SDI? SD-SDI, actually the first version of the standard, was introduced in 1989. It supports files up to 576i (NTSC and PAL resolutions at 25fps are acceptable) and four different bitrates: 270Mbps, 360Mbps. s, 143 Mbps and 177 Mbps. Digital Analog Serial Interface uses BNC connectors
Starting year	1989	Organization	SMPTE (Society of Motion Picture and Television Engineers)

The Serial Digital Interface (SDI) is a digital video interface receiver first standardized by SMPTE (The Of Society Motion Picture Plus Television Engineers) in 1989.^{[1] [2]} For example, ITU-R BT.656 and SMPTE 259M define the digital video channels used to carry broadcast quality video. A related standard known as High Definition Serial Interface (HD-SDI) has been standardized up to 292M; smpte a offers a nominal data rate of 1.485 Gbps.^[3]

Introduced forAdditional SDI standards to support growing video resolutions (HD, UHD and above), frame rates, stereoscopic (3D) video, ^{[4][5 ]} more color depth. ^[6] Dual link HD-SDI consists of a pair of SMPTE channels, conventional 292M from SMPTE 372M in 1998;^[2] This provides a nominal 2.970 Gbps interface used in approaches (such as Digital Cinema HDTV or even 1080P) that require higher fidelity and resolution than the HDTV standard can provide. Simple 3G-SDI (standardized at 424MB) consists of a 2970Gb/s serial connection, allowing double-tap replacement for HD-SDI. 6G-SDI and 12G-SDI standards refer to March 19, 2015 publication^[7][8]

These standards are used to transmit uncompressed and unencrypted digital picture signals (possibly including embedded audio and coded timing) from television equipment; they can be used for packet data at the same time. SDI can be used to connect various parts to devices such as recorders, PC monitors, and switchers. However, coaxial options are standardlengths are usually less than 300 meters (980 feet). Fiber optic models in specifications such as 297M provide long distance transmission limited only by the longest fiber length or repeaters. SDI and HD-SDI are generally only available in professional educational equipment, as various licensing agreements restrict the general use of unencrypted digital interfaces such as SDI and prohibit their use as consumer products. Several professional video and HD video compatible DSLR cameras and all uncompressed video compatible client cameras use the interface, HDMI is often referred to as pure HDMI. There are various modifiers for existing DVD players and other utilities that allow the user to add an important serial digital port to these devices.^[quote]

Electrical Interface

Various serial digital interface standards use almost all or (most) coaxial cables with BNC connectors and nominal impedance75 Ohm. This is the same cable format used in analog video installations, potentially making it easier to innovate (although longer distances at higher data rates may require higher quality cables). The specified signal amplitude at the source was 800 mV (±10%) peak-to-peak; Due to attenuation at the receiver, much lower voltages can be measured. With an on-device equalizer, it is possible to transmit SDI 300 at 270 Mbps over several meters (980 feet) without the use of repeaters, but shorter lengths are preferred. The HD bitrate has a shorter maximum playback time, typically 100 meters (330 feet).^[9][10]

Uncompressed digital dots are transmitted signals. The data is encoded in NRZI format and a linear feedback change register is used for fact scrambling to reduce the chance of long zero or one messages being present, especially at an intersection. The interface is considered to be self-synchronizing and self-synchronizing. Cropping is performed This is by finding a special time pattern that is displayed on a serial digital display (unencrypted) as a sequence of ten ones followed by twenty zeros (twenty ones followed by forty zeros in HD); This bit is not allowed anywhere in the actual data payload.

Default

name

Default	Submitted	Debit	Examples of video formats
SMPTE259M	SD-SDI	1989[2]	270 Mbps, 360 Mbps, 143 Mbps and 177 Mbps	480i, 576i
SMPTE-344M	ED SDI	2000[11]	540 Mbps	480p, 292M	HD SDI	1998[2]	1 576p
smpte.485 Gbps, 1.485/1.001 Gbps	720p, 1080i
SMPTE-372M	Dual link HD-SDI	2002[2]	2970 Gbps and 2970/1001 Gbps	1080p60
SMPTE-424M	SDI 3G	2006[2]	2.970 Gbps and 2.970/1.001 Gbps	1080p60
SMPTE ST 2081	6G-SDI	2015[7]	6 Gbps	1080p120, 2160p30
SMPTE ST 2082	12G-SDI	2015[8]	12 Gbps	2160p60
SMPTE T 2083	24G-SDI	In development[12][13]	24 Gbps	2160p120, 4320p30

Debit

• For standard definition applications defined by SMPTE 259M, the available data rates are 270 Mbps, 360 Mbps, 143 Mbps, and 177 Mbps. 270 Mbps should be the most commonly used; Indeed, a 360 Mbps interface (which is used for widescreen compatible resolution) is sometimes encountered. 143 and then 177 Mbps were interfaces intended for digital transmission over composite encoded video (NTSC or PAL) and are also now considered obsolete.
• For higher resolution processing (mostly 525P), several interfaces are defined at 540 Mbps, as well as a common interface for a dual-link interface at 270 Mbps. They are usually rare. HDTV
• For applications, the serial electrical interface is defined by SMPTE 292M. Two speeds are defined: 1.485 Gbps and 1.485/1.001 Gbps. A ratio of 1/1.001 allows the SMPTE 292M to support training formats with frame rates of 59.94Hz, 29.97Hz in addition to 23.98Hz for good performance. compatibility with existing NTSC systems. The 1485 Gb/s version associated with the standard supports other commonly used frame rates, including 60 Hz, 50 Hz, 30 Hz, 25 Hz, and 24 Hz. Both standards are commonly referred to as the nominal 1.5 Gb/s data rate.
• For some high-resolution applications that require higher resolution, image quality, or color fidelity than the HD-SDI interface can provide, the SMPTE 372M standard defines a dual-link interface. As the name suggests, this interface consists of SMPTE, a pair of 292-megapixel connections running in parallel. Specifically, my dual channel interface supports 4:2:2, 10-bit, 1080P printers at 60Hz, 59.94Hz and therefore 50Hz frame rates and 12-bit, RGB and 4:4:4 encoding depths. trying on a color choice.
• The nominal 3Gbps interface (20.97Gbps to be exact, but unfortunately commonly referred to as “3Gig”) was standardized by SMPTE in 2007 as 424M. Revised in 2012 as SMPTE ST 424:2012, it supports all supported variants of 1st dual interface, 485Gbps, but has only one cable instead oftwo.

Other Interfaces

SMPTE 297-2006 defines a fiber optic system for the transmission of serial digital signals. It is specifically designed to carry SMPTE ST 259 (143 to 360 Mbps), SMPTE ST 344 (540 Mbps), SMPTE ST 292-1/-2 (1.485 Gbps or 1.485/1.001) signals. Gbps) and ST Smpte 424 signals (2970 Gbps and above 2970/1001 Gbps). In addition to optical specifications, ST 297 also provides for laser safety testing, but all optical interfaces must be labeled to demonstrate safety compliance, scope, and therefore compatibility.

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Fixat SDI-codec-bugg.
Se Corrigió El Error Del Códec SDI.
Risolto Bug Del Codec SDI.
Correction Du Bogue Du Codec SDI.
SDI-Codec-Fehler Behoben.
Naprawiony Błąd Kodeka SDI.
Corrigido O Erro Do Codec SDI.
SDI-codec-bug Opgelost.
SDI 코덱 버그를 수정했습니다.
Исправлена ​​ошибка кодека SDI.