Television Brings Entertainment a Step Further

We can all agree that television has been an influential tool ever since its inception in the early 1920s. We have come to depend on the utility of the tube for almost everything that we require an update of. We all tune in to our TVs to find out what is new in all aspects of our lives. Television somehow holds our attention and gets us glued to it for quite a lot of hours.

In almost every home, the television is at the centre of family home entertainment systems.

1. How does a television work?

The five different ways to get a signal into your TV are:

  • programs broadcast through antennas placed outside your house or inside,
  • VCR or DVD player that connects to antenna terminals
  • Cable TV that connects to the antenna terminals
  • Large satellite-dish antenna that connects to antenna terminals, and
  • Small satellite-dish antenna that connects to antenna terminals

Broadcast programming is controlled by the three bands of frequencies in the radio spectrum allocated by the FCC (Federal Communications Commission). These bands are broken down into 6 to accommodate the TV channels. A composite video signal which is amplitude-modulated is broadcasted into your TV with the sound being frequency-modulated and works as a separate signal.

VCR works with the signal of channel 3 or 4 projected from a circuit that takes in the video and sound signals converting it into the signals of channel 3 or 4. Cable, on the other hand, have signals that are encoded. The service cable providers will modulate the different cable-TV programs then, transmits them to your TV. You would need a decoder to decode the signals in the same way a VCR does.

A decoder is also used to decode signals beamed in by satellites to earth and transmits them to your TV and sends them to either channel 3 or 4. This is for large satellite antenna. Small satellite-dish systems are encoded in MPEG-2 and the decoder transmits it to an analog TV signal and goes through channel 3 or 4 again.

2. The newest in television viewing

Digital TV or high definition TV also decodes the MPEG-2 format signals similar to satellites but uses new, and larger screen format just like a computer monitor will show with high resolution. Other types of boxes will decode the signals and send it to normal TV after converting it to analog.

All the hype now is HDTV or what is known as high definition TV.

If you want to shop for an HDTV you must have the following: a source such as a local, cable or satellite HDTV station, a way to receive the signal as in an antenna, cable or satellite, and you should of course own an HDTV. And to get a signal, you will need: An antenna, cable, and satellite service. Remember to check with your provider which packages work with your HDTV.

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