Digital Television And Its Effects

The achievements of modern digital technologies of last two decades are indeed profoundly impressive; they have lit many candles. The latest ICTs (Information and Communication Technologies) have completely changed our world outlook. The digital technologies are advancing at a fantastic rate; every new step opens up fresh vistas.

the hi-tech innovations of last quarter of 19th century have dramatically changed the way people watch the television. From black-and-white to color and from low-definition to high-definition, television had come a long way. The newest transformation is an introduction of DTV (Digital Television); outfitted with interactive services and superior video and audio visual quality features; digital television proffers viewers a more affluent television experience than ever before. The ones and zeros of digital technology started sweeping away of analogy system

on 1 of June, 1990, when General Instrument proposed an all-digital high DTV system; launching an era of digital television as different from present day analogue television as was the introduction of color from the 19th century mechanical scanning experiments of Baird and Compbell-Swinton.

Digital technology is more efficient means of broadcasting compare to analogue systems. As a natural result of recent technological progress, all electronic equipments and systems are going to be digital. They are more reliable and less susceptible to noise and interference. The quality of signal can be controlled by controlling the bits/symbol rate. The digital signals can be duplicated exactly. The latest data compression techniques allow a more efficient use of the precious bandwidth; which means either more services can be delivered in less space or a more realistic picture can be viewed. The digital technology is capable of transmitting at least four to ten digital services /channels of comparable “standard” quality with same bandwidth required for s single analogue channel.

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