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These standards are used for transmission of uncompressed, unencrypted digital video signals (optionally including embedded audio and time code) within television facilities they can also be used for packetized data. 6G-SDI and 12G-SDI standards were published on March 19, 2015. 3G-SDI (standardized in SMPTE 424M) consists of a single 2.970 Gbit/s serial link that allows replacing dual link HD-SDI. Dual link HD-SDI consists of a pair of SMPTE 292M links, standardized by SMPTE 372M in 1998 this provides a nominal 2.970 Gbit/s interface used in applications (such as digital cinema or HDTV 1080P) that require greater fidelity and resolution than standard HDTV can provide. Īdditional SDI standards have been introduced to support increasing video resolutions (HD, UHD and beyond), frame rates, stereoscopic (3D) video, and color depth. A related standard, known as high-definition serial digital interface (HD-SDI), is standardized in SMPTE 292M this provides a nominal data rate of 1.485 Gbit/s. For example, ITU-R BT.656 and SMPTE 259M define digital video interfaces used for broadcast-grade video. Serial digital interface ( SDI) is a family of digital video interfaces first standardized by SMPTE (The Society of Motion Picture and Television Engineers) in 1989. SMPTE (The Society of Motion Picture and Television Engineers) Serial digital interface uses BNC connectors