When a show is filmed the broadcasting service gets that video, and then uploads in to the TV satellite dish. A broadcasting station is a building that broadcasts the recorded programs to a TV satellite dish or analog cable. This building is also used to broadcast live shows, such as news or sports games. Now you, as a subscriber to this service, get access to those uploaded videos. Depends on which service you have, digital or analog, there are different ways to obtain it.

In analog, the video quality is worse than digital and is also worse than your average computer screen resolution. If you take into account that television has been around long before computers, it is weird that the resolution is still as low as it is. The analog signal is transferred through antennas and receivers. This service is not available in many parts of the world, and that is where digital comes in.

Digital is the best quality television, and is ten time better than the best analog TV. For this you need a computer style monitor, or a HDTV. The signal is better than analog because of the pixels. The pixels in a digital screen hold a much greater amount than analog TV.

A TV satellite dish is placed atop your house and then gathers signals from a satellite that is in space. The signal is then transferred to a receiver located on your television. A receiver is a box that collects, decodes, and translates codes of the television broadcasts in order for your TV to read it. HD channels are only available to a TV that can read HD codes, i.e. a HDTV.