October 1998
Beginner
192 pages
3h 52m
English
Television signals used to be recorded in an analogue format. That simply means the signal could be of any value from 0 to 1 volt.
Whenever you pass an electronic signal down a wire, through a connector, into another machine, recorded onto tape, etc., it loses some quality – the signal becomes slightly distorted, and It is impossible for the receiving machine to work out exactly what the original signal looked like.
Once a tape had been copied a few times, that quality loss (generation loss) became apparent, so we tried not to copy tapes too often.
The other way of sending a signal is to take thousands of measurements, and send a series of binary numbers down a cable. So, if at a particular time ...
Read now
Unlock full access