HDTV - A Beginner's Guide

are the analogue TV has been around for nearly half a century, while the standard definition TV (SDTV) has been here for over a decade. Today the situation is more and more content is always in high definition, which are not for display on analog TV and SDTV suitable disposal. The conversion to High Definition TV (HDTV) seems inevitable, but there are concerns that if it works and to consider the products. This article is essential to the understanding and help in HDTVthe selection process.

Evolution of analog TV to digital TV

Hd Tv

HDTV has been developed previously, there were two dominant analogue TV standard - NTSC and PAL / SECAM. Both standards use interlacing technology and aspect ratio of 4:3. During the era of analog, there have also been attempts to develop Japan as the muse of HDTV. This was finally starting, because the channel bandwidth requirement on large. Then came the development of video compression technologiesas MPEG-1, MPEG-2, H.264 and VC-1. This HDTV-enabled systems are suitable for broadband transmission frequencies of the channels available on satellite, terrestrial e. This also applies to the development of optical media such as HD DVD and Blu-ray has brought.

Advantages of HDTV on analog TV and SDTV

Higher resolution is the most obvious benefit of HDTV over analog and SDTV. For analog TV, the image is made of interlaced horizontalLines. For SDTV, 480p is what the image is images progressive scan done. For all HDTV formats - 720p, 1080i and 1080p, lines interlaced or progressive frames are far greater, the result of better quality. Another advantage of HDTV is the aspect ratio or picture. Use 04:03 for 16:09 against the analog TV and SDTV, like in the movies, they claim.

What are the different types of display HDTV?

The plasma screenThe technology to make the gas xenon and neon, which are sandwiched between glass plates. It offers better color and white image and response, and refresh rates, making it ideal for displaying fast moving video. A typical 50-inch screen size with an average cost of $ 1,500. The LCD screen technology based on liquid crystals. Advantages over plasma more life, no, the answer to burning and consumption of electricity. Screen size with a typical 37-inchaverage cost of about $ 1,000. Projection TV, DLP is the most popular of a cheaper alternative to plasma and LCD. This is actually a rear projection technology, micro-chip projectors used in combination with a color wheel and a series of small mirrors. This mechanism provides a high contrast ratio and can be brighter and DLP HDTV is ideal for larger environments. Average price for a 72-inch screen size is about $ 2,000.

SDTV and analog TV will be goneHDTV in a few years and will remain here. If you want to purchase now, should be the choice of the future. It should work both existing analog and SD and the increasing number of HD content. Also, keep in mind that HDTV is a mature technology, such as analog SDTV, and will continue at some point he went to join the others who have made ​​the switch. Enjoy today's technology that the next stage of Super High Definition TechnologyHi-Vision is just around the corner.

HDTV - A Beginner's Guide