What is SDI and CPRI?

Dear friend!
SDI has many meanings. It is short for a string of words. For example:
Serial Digital Interface, Software-Defined Infrastructure, and so on.
The serial digital interface is most commonly used, It can be extended to HD-SDI signal(High definition video signal transported by serial digital interface), or SD-SDI(Standard definition video signal transported by serial digital interface). The client side of Huawei optical transmission equipment supports the access of video signals of the SDI interface type.

Common Public Radio Interface (CPRI)：

A common standard of the key internal interface between the REC and the RE of the wireless base station. This standard was established by Huawei, Ericsson, NEC, Siemens, and Nortel in June 2003. It aims at standardizing the baseband and RF interface. The CPRI has a set of mature standards, which advance the standard and equipment. The major feature of the CPRI is that baseband is separated from RF to reduce the cost of engineering, equipment room, and equipment.

The SDI service is used in video surveillance and video conferences.

CPRI services are widely used in base stations of operators.

Thanks！