What is a serial digital interface?

Serial Digital Interface (SDI) is a video interface usually used in professional applications. It uses standard coaxial video cables with professional connectors Bayonet Neill-Concelectman (BNC) to carry a video that is coded as a digital data flow. Since the serial digital interface cables originally lacked the capacity for transporting a high-resolution video signal (HD), the SDI standard was extended by high HD-SDI bit cables. This is sufficient to transmit a signal of 480 lines at 60 interlaced images per second, which corresponds to the standard resolution of the North American National Television System (NTSC). It can also carry a 576-line signal at 50 interlaced frames per second, corresponding to the standard of the alternating line of the European phase (PAL). These interlaced standard definitions of NTSC and Palignals contained 30 or 25 complete images broken in half, per second.

Given thatE has grown a television resolution, Society of Movie Picture and Television Engineers (SMPTE) upgraded the standard digital interface standard to allow higher data belt widths. While the ED-SDI, which means an improved SDI definition, allowed the transfer of 480 or 576-line signals consisting of 60 or 50 full frames per second, this standard proved to be insufficient for high-resolution video (HD). The HD-SDI has passed several forms to achieve a third-generation 3G-SDI standard that builds on a double HD-SDI standard to allow up to three gigabits per second data transfer, more than enough to carry a full-resolution video signal at 1,080 lines up to 60 full.

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serial digital interface has a number of advantages over the connectors of audiovisual consumer connectors. SD-SDIODS cable runs up to 984 feet (300 meters) and even high-bite-backed-digital digital interfaces with 328 feet cable runs (100 meters), much longer than what is reasonably possible with consumer standards such as HDMI or component video. SDI also transmits an uncompressed digital video signal without any encryption and security that is built into the HDMI standard. It also uses standard 75-ohm coaxial cables and safely suitable BNC connectors, increasing the likelihood that the connection will remain tight, reducing both the risk of cable dropping and the risk that the noise affects the digital signal.