When was high definition tv introduced

A third idea under discussion is to use the fiber-optic cables, currently being installed by telephone companies, to carry high-definition television signals.

After buying new high-definition sets, viewers would subscribe to fiber-optic cable service, in much the same way as some traditional-TV-set viewers now buy cable TV packages. When high-definition television eventually becomes available, the new hardware will have more in common with computers than with ordinary television sets.

Traditional television works on an analog system: audio and visual elements are converted to undulating electric waves for transmission to television receivers TV sets , which reconvert the waves into visible light rays pictures and audible sound. High-definition television will be digital. The new sets will convert analog waves into digital code, with strings of zeros and ones representing each bit of picture information, color, shade, placement.

A microchip in the new sets will process the digital code, paying strict attention to each light element, to produce richly detailed pictures. HDTV is not without its critics, some of whom contend that the enhanced pictures are barely discernible from those on old-fashioned TV. Even so, market analysts predict HDTV will be worth billions of dollars a year to the electronics industry; therein lies the real incentive.

In the United States, where only one major company, Zenith, continues to make TVs, the financial motive is especially strong. The good news for American companies interested in regaining a toehold in the consumer electronics market is that current U. The bad news is that Japan began HDTV broadcasts in , giving it a big head start in perfecting the equipment. January 8, November 19, October 25, August 21, April 27, May 30, December 31, July 3, August 15, News Developments Ideas.

The Development of HD Technology The earliest high-resolution experiments date back to the s and s , when resolution was measured in lines per screen. But further development of analog HDTV was blocked by limited bandwidth.

HD Today HDTV uses a standard called p, which delivers a resolution of xp, equivalent to 2,, pixels per frame 2. Related posts:. Researchers achieve HD video streaming at 10, times lower power April 27, Tech push transforms TV viewing experience May 30, Not so with high-definition TV. High-definition television broadcasts are the law of the land now. A scant few months after the digital switchover, a number of manufacturers and broadcasters are pushing 3-D TV, which would require a whole new upgrade cycle.

No government mandate for this, so only the market will determine whether 3-D TV is the next great thing. Follow us for disruptive tech news: John C. Abell and Epicenter on Twitter.