Digital TV (not to be confused with \"High Definition TV\") is a new format for broadcasting television signals via satellite or conventional over land services (networks). Although digital tv is not mandated yet for all TV services it is on the near Horizon. Digital techniques are used to conserve bandwith (defined as the amount of space or speed required to transfer the data neccessary to produce the Video picture to be viewed. This is accomplished by turning conventional (analog) TV broadcasts into number codes. Much Bandwidth conservation can be realized by simply broadcasting only the changes from one picture to another (in other words broadcasting the changes as opposed to painting a complete new picture.) It is possible to transmit 4 television pictures in the same spectrum (space) as conventional Television uses for 1 picture. This is advantageous for a number of reasons. Satellite broadcasting space Interference immunity, and economical reasons regarding broadcast power consumption. You are currently receiving pictures that are generated as digital signals and are converted to usable format for our cable system as well as conventional analog (old method) receivers.
Why are some channels more clear than others? The most asked question in any cable service system is the one above. There are many reasons why pictures vary from channel to channel but we will deal here with a few....
