Brief History of TV in the TK and abroad.

Television started in the 1876 when a man named Nipkow invented a rotating disk. This rotating disk could be used to capture and project moving images with the use of electricity. But unfortunately he never developed a system that could work the disks. However, come 1925 and John Logie Baird had invented an operational telly that could use this device. It could also transmit pictures via am electronic signal. He was so forth considered the first person to invent the TV as we know today.

In 1928, America saw the first broadcasting of TV across the world.  This begun on the 2^nd of July. But by 1929 both Britain and Germany were starting to see broadcasting facilities as well. However, the amount of viewers was of course limited as the television was so new. The next country to be broadcast to was France in 1931, and from there more and more countries began to get televisions.

In 1922, the BBC was formed by John Reith and began with radio broadcast. This continued up to 1936 when the world’s first TV service was launched. Two systems were used on an alternate week basis against each other to see which worked best. These were the Marconi-EMI’s 405 line system and the Bairds 240-line system. They each had their own broadcasting studio, but in the end the 405-line system was picked in 1937 as the best broadcasting machine.

The UK broadcasting standards used is PAL. This stands for Phase Altering Line and is an analogue television encoding system. Subcarriers are used to carry the information for broadcasting. This forms a signal for a baseband. For Pal, the frequency of the subcarrier is 4.43361875 MHz.  However, NTSC contains 29.97 interlaced frames of video per second and SECAM has a chrominance signal of 4.4 MHz.