Read the text again and answer the questions.
1. What type of broadcasting uses radio waves?
2. What problems were there with this system?
3. What is binary code?
4. How can TVs receive digital information? Name four routes.
5. Does a decoder have to be inside a TV? Explain your answer.
6. What's the difference between an HDTV and a standard TV?

1. Analogue broadcasting uses radio waves.

2. The problems were interference, weak signal, poor picture or sound, and a limited number of channels.

3. Binary code is a way of sending information using only two symbols: \(0\) and \(1\).

4. TVs can receive digital information through four main routes: an aerial, a cable connection, a satellite dish, or the Internet.

5. No, a decoder does not have to be inside a TV. It can be built into the TV, or it can be a separate box connected to the TV.

6. An HDTV has a higher resolution than a standard TV, so the picture is sharper and more detailed.

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