HDTV - 2 - Principles and History of HDTV

Before buying your new HDTV set, you must be familiar with some of its basic technology and function. (How else do you want to be able to answer the questions in Part 1?).

The first step essential to know that it takes, will give you the basic structure of HDTV, how it works, and some knowledge of the future of HDTV not buy yesterday's technology today!

Hd Tv

What is HDTV?

HD stands for "highDefinition ", and is the new standard of television. HDTV is actually part of the digital television (DTV) specifications) proposed by the Advanced Television Systems Committee (ATSC has defined as ATSC. The different transmission formats eighteen years, including six" to high definition "because they are an incredible growth and progress towards the resolution of the quality of a television program.

HDTV has 1125 lines of horizontal resolution compared to 525The lines of the NTSC analog TV signals. So, HDTV with more than five times the video information than previous analog NTSC television. In other words, there is more information in a similar space in which "higher resolution" or more detail in picture quality.

A short history of HDTV

Although HDTV has a very short history, has been influential in the conversion of home digitalEntertainment area. The credit goes to the service provider of satellite television, the primary demand for a new HDTV.

It all started nearly 15 years ago, in 1987, when the FCC (Federal Communications Commission) in the rule that says the standard NTSC HDTV service was to be backward compatible with existing. Another way of thinking is that to be able to receive any new signal format and are displayed on color schemes and rules set forth above and the elders hadfor black and white TV.

But later, in 1990 brought General Instrument Corporation, a transmission and all-digital broadcasting standard. By the end of 1990 has created a serious contender to four in the United States: ATRC, Zenith HDTV and AT & T, and MIT. These organizations announced its digital input on the HDTV market. It did not take long to realize that there are rules defined to be consensual and that a system is expensive to developfrom scratch. AT & T, GE, MIT, Philips, Sarnoff, Thomson and Zenith: In 1993, an alliance between the different States.

The agreement, a mutually beneficial coalition. They were based on designs taken the best features of each of their first four HDTV systems and develop a common standard for HDTV transmission system. You have successfully tested in 1995 and the FCC has set as an HDTV standard that we have today.

Next - How tois exactly HDTV system are different from the old analog and what it does?

HDTV - 2 - Principles and History of HDTV