When Was The First High Definition Television Invented?
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It has been more than 80 years since the first television demonstration took place in London. Since that time the television evolution has undergone remarkable advancements. The most notable development is the High Definition Television or HDTV.
HDTV is a distinctly digital system. HDTV delivers considerably more resolution than the standard definition television and it features a wider aspect ratio format that is similar to human peripheral vision. HDTV delivers the astounding image quality with the highest DTV resolution combined with CD-quality Dolby Digital surround sound. HDTV has been around in different forms since the 1970s and has an interesting history.
During the 1970s and 1980s, the trial HDTV product was being developed in Japan. The purpose was to improve television quality. The first HDTV system was called MUSE. The Muse utilized filtering techniques to decrease the original source signal in order to reduce the use of the bandwidth. In the US in the 1980s, the National Association of Broadcasters asked Japan's public network, NHK, for their concepts behind the MUSE system, and to present them to the Federal Communications Commission. There was resistance by some groups such as the Terrestrial Television Broadcasters who worried they may be pushed out of the market because HDTV required more bandwidth than standard TV. Also, Congress did not like innovative Japanese technology coming to the US and they did not want new communication technology being owned by another country. The concerns were resolved when the US government enlisted the services of experts to create a new form of HDTV. In 1987, the Federal Communications Commission asked for advice from the private sector and formed the Advisory Committee on Advanced Television Service. After various groups spent years working separately, they eventually merged into one group called the Grand Alliance.
As the group of researches worked to create a new form of HDTV, they discovered that it would have to be partially digital to ensure it would fit into current channels. This enabled the researchers to develop a system that was different from the Japanese system. The Japanese NHK version of HDTV was analog, but the American researchers' version became entirely digital.
In the United States, the first demonstration of HDTV took place in 1981. At the start, there were about 23 different Advanced Television systems proposed to the committee. By 1990, there were only 9 and they were all based on analog technology. By mid 1991, the principal ATV designs were based on an all-digital design. In 1995, a number of companies together presented a proposal to the FCC for an all digital ATV system. In December, 1996, after some tweaking, the proposal was approved by the FCC. It became the Advanced Television Systems Committee (ATSC) standard for terrestrial DTV/HDTV broadcasting.
After 35 years of development, High Definition Television began to enter the consumer marketplace. Today, High Definition Television is the television choice replacing the analog television. With the years of research and development that has gone into the HDTV system, this form of television is likely to remain for decades.
Article Source: Articlelogy.com
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