Analog: For years, watching TV has involved analog signals. The signal is made of continuing varying radio waves that the TV translates into pictures and sounds. These signals reach your TV over the air, through a cable, or via satellite. Obviously, it can show only standard-definition program such as those found on regular TV, direct TV, Dish TV, cable or satellite.
Digital: Digital television is better known as DTV. A digital signal transmits the information for video and sound as ones and zeroes instead of a wave in a digital format. Digital television has certain advantages over analog. For example picture quality of digital TV is always better irrespective of the size of the screen. It allows multi-casting, and TV stations can broadcast several signals using the same bandwidth. It can also display progressive-scan DVD and can support HDTV broadcast as well.
HDTV: HDTV is by far the most common and advanced form of digital television. It can display almost everything including standard TV, progressive-scan DVD, and HDTV signals.
No comments:
Post a Comment