Since the invention of television in the 1920s, the TV has been a main medium for media,entertainment and leisure, But before television there were newspapers which was a big form of communications and then came telegraphs which allowed instant communication over vast distances;Same sort of thing which was used for soldiers to contact family and vice versa. With the telegraph slowly fading then came the radio, this became the most used and popularized; as radio was developing , the telephone was perfected and the content for it was well developed beyond its years, this then became a dominant form of mass-communication technology.....UNTIL!!!
THE RISE OF THE TELEVISION
The early concepts of TV were predicted in the 18th and 19th centuries. Scientists from around the world worked to perfect television for decades, with the key breakthroughs coming in the early 20th century, the invention springing from the work of many minds.
Color was added in the 1950's, but the technology was same. Digital television is actually the transmission of television signals using digital methods. Analog transmission is always as a constantly variable wave; digital transmission consists of an electrical pulse which has two possibilities: on and off, which are represented by a one and a zero. Because a digital signal does not fluctuate, it is either present or totally absent, a digital transmission is more precise than an analog transmission. Although, both signals are transmitted in same way and have the same range, but they behave differently at the limits of their ranges. An analog signal degrades over distance and may be barely detectable at the farther reaches of the broadcast area. As the signal reaches the farther limits of its range, the signal-to-noise ratio decreases and the quality of the broadcast suffers, although the range remains the same. In comparison, when the signal-to-noise ratio decreases in a digital signal, the quality of the broadcast does not degrade, but the range shrinks.
http://www.youtube.com/watch?v=ZagSqk7FMio
The Internet may not have changed everything but it’s changing a lot, including traditional activities such as warehousing and distribution. Just as the Internet has sped the flow of information and diversified the availability of data, it is also changing the way retailers use warehouses and distribution centers to manage the flow of inventory. In fact, among the most significant impacts of the Internet may be its ability to improve the match between demand and inventory.
There are many advantages of digital TV over Analog TV some of them are superior image resolutions for a given bandwidth, smaller bandwidth for a given image resolution, compatibility with computers and the Internet, interactivity, superior audio quality, consistency of reception over varying distances, capacity for multicasts etc. These features place the digital TV much ahead of Analog TV and future of digital TV looks very bright.
In the future, cable operators might also move to all digital means of delivery, which means you may be required to lease a set-top box or own a TV with a digital cable tuner to continue to receive the channels you now view on a conventional TV.
The transition from analog to digital TV is not going to affect the future of the commercial video equipments like DVD players or other video equipments. Future of the videos produced for the computers and Internet are poised for a big leap ahead. The digital TVequipped with enhanced video quality, increased resolution handling and compatibility with computers would pave the way for thousands of beautiful amateur videos currently unavailable for the general masses. High quality videos currently available on the net would be shared and shown to the masses through digital TV soon without compromising on their quality of the video. The future of video seems to be on the launch pad of a very bright path with digital TV.
WEB 2.0
http://www.youtube.com/watch?v=6gmP4nk0EOE
No comments:
Post a Comment