In digital logic applications, bit-serial architectures send data one bit at a time, along a single wire, in contrast to bit-parallel word architectures, in which data values are sent all bits or a word at once along a group of wires. Almost all digital computers before 1951, and most of the early massive parallel processing machines used a bit-serial architecture—they were serial computers.

SDI-Serial Digital Interface, widely used in SDI encoders, SDI converters and other equipment, which has been applied to radio and television fields, security monitoring. And we have witnessed the development of the video standard with the ultra high definition standard from SD-SDI, HD-SDI to 3G-SDI, 6G-SDI, 12G-SDI and 24G-SDI.

At the same time, it has also promoted an era of a new digitized video display in both monitoring and radio and television fields. Below we discuss the difference between the various SDI interface. DefinitionSDI: Serial Digital Interface (SDI) is a family of digital video interfaces first standardized by SMPTE (Society of Motion Picture and Television Engineers) in 1989.

For example, ITU-R BT.656 and SMPTE 259M are defined for broadcast-grade video.SD-SDI: The SD-SDI standard support the 270 Mb/s bit rate. SD-SDI is used to transmitting low-resolution PAL compatible video 720. 576 @ 25fps and uses a clock rate of 27 MHz. In 1994, ITU-R (formerly International Radio Consultative Committee) released Recommendation BT.656-2, incorporating the new serial digital interface defined in EBU Tech.3267 and SMPTE 259M, which uses 10-bit transmission and non- Zero Reverse (NRZI) encoding. The clock rate was 270 Mb / s when transmitting a 4: 2: 2 level signal from ITU-R BT. My sim is invisible sims 3.

601 (part A), at which point the SD-SDI standard was defined, which is today’s SDI.HD-SDI: The standard known as the HD Serial Digital Interface (HD-SDI) is standardized in SMPTE 292M; Although this standard is known as the 1.5 Gb / s interface, the bit rates supported by HD-SDI are actually 1.485 Gb / s and 1.485 / 1.001 Gb/s. OPTCORE provides a wide line of for the special broadcast application.3G-SDI: This standard is known as the 3 Gb/s interface, but the actual bit rates are 2.97 Gb / s and 2.97 / 1.001 Gb / s.

3G-SDI supports several different mapping levels, as described in the SMPTE ST425-1 standard. These levels are called A, B-DL, and B-DS. Like the HD-SDI standard, the supports 3G-SDI CRC generation and checking as well as line number insertion and capture.6G-SDI: This standard defines a bit-serial data structure, electrical signal and coaxial cable interface for the transport of signals with a total payload of 5.940 Gb/s or 5.940/1.001 Gb/s.

This standard also specifies the electrical and physical characteristics of coaxial cables and connectors. This standard defines several mapping modes for the carriage 2160-line and 1080-line image formats and associated ancillary data into a Single-link 6 Gb/s nominal SDI bit-serial interface.12G-SDI: The 12G-SDI is an SDI standard developed to support higher resolution, frame rate, and color fidelity. It provides four times the bandwidth of HD, carrying 12Gbps, making it ideal for the 4K 60p format. This is not new, UG has been developed 6G / 12G since 2012, but has not been approved by the standard governing body SMPTE (Society of Motion Picture and Television Engineers) under the SMPTE ST-2082 draft name. Click to learn more about.24G-SDI: also known as UHD-2 or 24G UHD-SDI, defined in SMPTE ST-2083, this standard supports 8k 120p resolution.