How are digital television pictures sent? The TV program is filmed, This is a real life analogue signal It is converted to a Digital signal The signal is transmitted using radio waves It is received by your aerial and decoded at your house Watch TV
Digital Signal Signal with quite large signal to noise ratio. The signal only consists of ‘1’s and ‘0’s so it can be recovered exactly. This can be done as many times as necessary.
The advantages of digital signals The disadvantages of digital In pairs discuss Unwanted noise quality Quantity of information Unwanted errors Easy to use The advantages of analogue signals The disadvantages of analogue simple complicated Needs extra equipment Difficult for humans to understand Easy for computers to work with
Write your own code and swap with your neighbour to decode A 0 B 1 C 10 D 11 E 100 F 101 G 110 H 111 I 1000 J 1001 K 1010 L 1011 M 1100 N 1101 O 1110 P 1111 Q 10000 R 10001 S 10010 T 10011 U 10100 V 10101 W 10110 X 10111 Y 11000 Z 11001 Put commas between the words to help the decoding Encoding