High Definition Television is basically different from regular TV as it offers a television broadcasting system with a much higher resolution when compared with traditional formats. HDTV is broadcast digitally and its introduction coincides with Digital Television being introduced. Regular television has a system in which waves are scanned at 480i. This means that at a given point of time four hundred and eighty lines of pictures are sent by the service provider to the television. The lines alternate between odd and even in a succession that is too fast for the human eye. HDTV sends around a thousand eighty or seven hundred and twenty lines, which is more than double the regular TV in the former case. The advantage is that the resolution is much clearer and the picture quality is much better.
The difference between HDTV (High-definition television) and a normal television is it has a drastically higher resolution. It is far better than other formats like (NTSC, SECAM, PAL).
Apart from the early versions found in Europe and Japan, HDTV is broadcasted digitally. HDTV's introduction generally clashed with that of DTV (Digital television) format. This technology was started in US during early 90s by the Digital HDTV Grand Alliance. The grand alliance consisted of AT&T, Philips, MIT, Sarnoff, General Instrument, Thompson and Zenith.
Though a huge number of high-definition television standards have been planned but implementation will be limited. The existing HDTV values are defined as ITU-R BT 709 as 1080 active interlaced lines or progressive lines, or 720 progressive lines, applying a 16:9 aspect ratio. HDTV has two times the better resolution than that of standard-definition television. Therefore providing a better quality than TV and DVD.
The difference between a HDTV (High Definition TV) and a regular TV set is in the number of lines that is transmitted to and displayed on the screen.
HDTV is high resolution, working on 1125 lines of resolution. This is over five times the information that a regular 525 line NTSC television set receives. With so much more data being received, the TV picture is much sharper and realistic.
The downside is that a HDTV set consequently needs a signal that occupies five times more bandwidth. At the moment, HDTV sets are around a third more expensive than regular TV sets. However, this new era of digital TV broadcasts means HDTV sets can display TV output in wide screen mode.
