What is the difference between SDI and traditional analog signal matrix?

SDI matrix is ??a digital video matrix switcher with a BNC interface. It is a high-performance intelligent matrix switching device specially developed and produced for the display switching of SDI digital video signals. It is used to switch various video input signals to the video output channel.

On any channel, it is mainly used in radio and television projects, multimedia conference halls, large-screen display projects, TV teaching, command and control centers, etc.

The first thing I learned about the Xunwei technical article is that due to different signal sources, the matrix circuit principles are also different. The traditional matrix is ??a cross-point circuit processing structure (Cross-point Circuit) as shown in Figure-1, while SDI is currently

1:1 or 1:4 or 1:8 SDI image input distribution amplification card method, plus 4-way or 8-way SDI signal synchronization processing method to synchronously distribute the input and output signals, and finally use AD or DA

(analog/digital) is converted into NTSC or PAL TV image signals and output to the monitor. From the appearance and equipment structure, there is almost no big difference between the traditional array and the SDI matrix. However, in terms of system architecture,

We can find that the traditional matrix changes into more irregular matrices such as 16x4, 32x8, 32x16 and 64x16, 96x16 or 128x32, 256x96 to 4096x256.

The SDI matrix is ??currently limited by signaller components and distribution amplification rules. The current matrix size is approximately 1x4, 4x4, 8x8 and 16x16, 32x32, and then after card stacking, it becomes 64x32, 64x64 and 96x32, 96x64 and then the maximum 128x32, etc.

Regular structure, the current technical conditions are about 128x128, which is the maximum capacity that can be actually applied.