The SDI interface is an acronym for serial digital interface. The serial interface is an interface that sequentially transmits each bit of data and the corresponding data through a single channel. Due to the high data rate of serial digital signals, they must be processed before transmission. Use scrambled non-return-to-zero inversion (NRZI) to replace the early block coding. Its standards are SMPTE-259M and EBU-Tech-3267. The standards include digital composite and digital component signals including digital audio. Before transmission, the original data stream is scrambled and converted into NRZI code to ensure that the original data can be restored reliably at the receiving end. In this way, the digital serial interface can be conceptually understood as a baseband signal modulation. The SDI interface can pass 270Mb/s serial digital component signals, and for 16:9 format images, it should be able to transmit 360Mb/s signals. The SDI interface cannot directly transmit the compressed digital signal. After the compressed signal recorded by the digital video recorder, hard disk and other equipment is replayed, it must be decompressed and output through the SDI interface before it can enter the SDI system. Sometimes it is difficult to determine whether the interface is a high-definition SDI or a standard-definition connector. You need to check the manual or test directly.
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