The Encoded Signal
Video information is constrained by available transmission bandwidth and the limitations of recording media. To overcome this limitation, the video information must first be condensed or compressed so it will fit within the available space. This is done through a process called encoding, which involves taking all the parts of the video and audio information and combining or eliminating the redundant material mathematically. It is also the process of converting from one form of information, such as light, to another form, such as electrical or magnetic data, for use in recording and transmitting video and audio signals.
Analog and Digital Encoding
There are four ways to encode or process video signals. In both the ...