As technology advances, most nations are migrating from the analog to digital television. On this resource, we try to understand the difference between an analog and digital televison. The difference between them comes in the way signals are transmitted from source to the television. This transmission is the one that determines what type of television the consumer is going to buy. All televisions transited from the analog form before digital television (DTV) came to existence. An analog television involves continuous transmission of signal. The amplitude of the signal varies depending on the information of the picture. This can be likened to the way music was transcribed onto vinyl records. Signals move up and down depending on what is being broadcast. Analog signals are transmitted through radio frequency (RF). The signal gets weak with the distance it has to travel or even any obstacle on the way such as big buildings. Most analog televisions are now able to receive digital signals through the use of a set top box or a cable converter.
On the other hand, digital television uses a more advanced technology in signal transmission rather than the continuous variable signals. It converts these signals into a stream of binary on/off bits, that is, the sequences of 0 and 1. Each of the bits represents a small part of the full picture and these bits join to form a complete picture on your television which is the exact copy of the original picture. This is how the computers store files. A digital television is therefore not prone to ghosting like the analog television since a 1 bit will always be 1 while the 0 remains just that. The signal is not affected by the distance. The digital television therefore guarantees quality sound and picture. However, it is good to understand the difference between a digital TV and a high definition television (HDTV)