Decoding the signal from 1988 Videophone

Nowadays it’s easy to have a video call with almost every part of the world. But it took a long time for the technology to reach this level. I will show what solutions engineers used back in 1988, so you could not only talk but also see your friend or partner during the call.

Once I saw a YouTube review of Sony PCT-15 — this device, made in Japan, was connecting to an ordinary telephone line and allowed not only to talk with another person but also to send and receive images during the call. At that time the high-speed communication was available only for…