What is ADKEY technology?

ADKEY OSD keyboard use 2 wire other than 6 wires offers 5 key include Up Down Left Right and Confim.

When diffenent key press down there will be different resistance between the 2 wire. DSP/Microcontroller detect which key is pressed according to the resitance difference.

What is HD-SDI, EX-SDI?

SDI - Serial Digital Interface, is a uncompressed video format. So there is no need extra time to encode and decode. It is realtime transmission. 

HD-SDI - High Definition Serial Digital Interface - is the first HD analog standard, and it uses coax cable to send video in a digital uncompressed format.  Transmit video up to 150m (500ft) over 75-3 coax cable.

EX-SDI enhanced SDI technology, can transmit loseless video up to 500m (1600ft) over 75-3 coax cable.

SDI offers better image quality than AHD.

SDI is widely used in film, television, medical, industrial control and other fields.