What is HDTV
Do we know the wonders of HDTV? To know and understand the technology behind HDTV, we need to learn as to what is HDTV. High Definition Television (HDTV) is a digital signal that delivers or broadcasts high-resolution pictures on big screen. This is the technology of the future. We all watch televisions but did we ever wonder as to, in what resolution do we watch television. The resolution of a television remains fixed and we cannot change the resolution as and when we wish. It is here that the HDTVs are launched and it provides a complete makeover on how we watch television. HDTV is simply not a TV with a wide screen, but it brings an array of options in the world of entertainment both in audio as well as video. HDTV has set new standards of viewing Television. It is all about transforming digital signals and from the consumer’s viewpoint it reflects better viewing and finest acoustics. The birth of HDTV is a result of the process of upgrading digital technology from analog technology. The unique selling point of HDTV is its higher resolution picture. We need to understand how we receive TV signals at home. As we watch DVD on a non-HDTV at home, the technology involved in it is that the digital signals of the disc that gets converted to analog and your TV can display them to you. However, in this process the picture resolution and quality is lost. It is here, that we find a High Definition Television comes and it provides its viewers with a cinematic experience. The 720 or 1080 lines as compared to 520 lines is a great improvement in picture quality and that makes HDTV unique and special. In the recent times it is the hottest selling electronic gadget with its amazing detail and splendid digital superiority. What makes HDTV so great viewing? To answer this we need to compare the aspect ratio of a HDTV with a normal TV. The normal TV generally has aspect ratio of 4:3. This implies that the screen is 4 units wide with every 3 units high. Whereas in case of HDTV it is 16:9, the wide viewing offers the experience of most picturesque movie theater viewing. HDTV also helps in squeezing the black and the grey bars that come on the sides of the pictures or on the top and below of the picture referred as the windowpane screen or the letter box screen making the picture look wider. HDTV is an absolute winner when it comes to resolution. Higher resolution implies better picture quality. The glossary of television defines resolution as the clarity of picture on the screen based on the pixels on the screen. A 4:3 aspect ratio TV screen has 480 lines, each with 720 pixels whereas a HDTV of 1080 lines and 1920 has six times the pixel density thus displaying sharper and vivid image. Additionally, HDTV uses the technology of Progressive Scanning to display a complete image. In Progressive Method every pixel is refreshed simultaneously while in the Interlaced method the pixels are refreshed alternatively, first the odd lines and then the even ones. The speedy delivery of the image gives crystal clear picture and makes it worth viewing. This is a major advantage over older analog televisions. Thus, why not expand your digital signal universe with a HDTV viewing experience? Its after all, for your eyes only. You can find more information at LCD TV Reviews.
