Serial digital interface
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![AMD DirectGMA enables low-latency peer-to-peer data transfers between devices on the PCIe bus and AMD FirePro-branded products. Devices supporting DirectGMA can write directly into the graphics memory of the GPU and vice versa the GPU can directly access the memory of a peer device.](/Images/godic/202502/10/AMD_DirectGMA.svg5127.png")
![HDMI to SDI Converter](/Images/godic/202502/10/HDMI_to_SDI_Converter5127.jpg")
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. For example, ITU-R BT.656 and SMPTE 259M define digital video interfaces used for broadcast-grade video. 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.