Introduction to common sense about 3G-SDI interface
SDI is a serial digital interface that is used to transmit uncompressed digital video signals. In the 1980s, SDI was rapidly developed and defined its standards. 3G-SDI from the frame rate 3G in 3G-SDI means that the data transmission rate of the SDI signal is 3 Gbits per second. Since HDTV can support a progressive scan of 1920×1080 resolution format of 30 frames per second, 3G can support twice the frequency of the highest frame scan frequency of HD video signals, that is, 3G can support HD signals of 60 frames per second. This is a big difference when watching a dynamic video. The difference between 3g-sdi and hd-sdi The HD-SDI optical transceiver is designed and manufactured as a highly reliable, high-performance serial digital optical transmission equipment for the television industry. The signal format ranges from 19.4Mbps to 1.485Gbps. The system supports SMPTE292, SMPTE259M, SMPTE297M, SMPTE305M, SMPTE310M and DVB-ASI. (EN50083-9) Signals in digital TV formats meet the requirements of industrial grade products. 3G-SDI Ultra High Definition Digital Video Optical Transceiver is an upgraded version of HD-SDI optical transceiver with signal format from 19.4Mbps to 2.97Gbps. The system supports SMPTE424M, SMPTE292M, SMPTE259M, SMPTE297M, SMPTE305M, SMPTE310M standards, and DVB-ASI (EN50083-9). ) Signals in digital television formats. The origin of 3G-SDI With the advent of high-definition (HD) video standards such as 1080i and 720P, the interface has been tuned to handle higher 1.485 Gbps data rates. The 1.485-Gbps serial interface is often referred to as the HD-SDI interface and is defined by SMPTE 292M. It uses the same 75 ohm coaxial cable. SMPTE approved a new standard called SMPTE424M, which doubles the SDI data rate to 2.97Gbps on the same 75 ohm coaxial cable. This new standard, also known as 3-Gbps (3G) SDI, supports higher resolution image quality such as 1080P and digital cinema. Currently, the highest-speed digital product is 7K-SDI. 3G-SDI signal has been widely used in the broadcasting industry. With the continuous development of the security industry, its advantages of high-speed uncompressed digital are gradually being explored. At present, a large number of 3G-SDI series products, including SDI conversion equipment, have been launched on the market. , SDI digital switching matrix equipment and SDI distributors. These devices use 3G signals and are also compatible with 1.5G signals for long-distance transmission to meet the diverse needs of users. 125mm Wall Chaser Groove Cutting Machine
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