Serial (radio and television)

When you watch TV or listen to the radio, the programs come to you through a series of signals that are sent out from a source. These signals are called serial signals. Serial signals contain all the information that makes up a program, like the audio and video, and they are sent out in a specific order.

Think of a serial signal like a train that carries different types of cargo from one place to another. The cargo can be things like food, toys, or books. Just like a train has a specific order in which the cargo is arranged, a serial signal also has a specific order in which the audio and video are arranged.

When you turn on your TV or radio, it receives these signals and uses a special decoder to separate the audio and video from the serial signal. It then plays the audio and displays the video on your screen in the correct order.

It's important to note that not all programs are sent out through serial signals. Some are sent out through other types of signals like digital signals, which travel faster and can carry more data than serial signals. But serial signals are still used for many programs and are an important part of how we watch TV and listen to the radio.