HD TV : What is it?
| High-definition televisions (HDTVs) display images at much higher resolutions than PAL, SECAM, NTSC, and other video formats. They are designed to receive digital TV (DTV) signals, which take up less bandwidth and supports additional services, such as pay-multimedia and interactive TV. Most HDTV sets have 16:9 aspect ratio and support wide-screen DVD formats. They also support 5.1 surround sound using Dolby Digital, allowing them to produce theater-quality audio as well.
|
|
view recommended products
Kinds of HD TVs include the following: |
Cathode ray tube (CRT) HDTVs
- CRT HDTVs use phosphor-coated glass tubes to emit light and produce colors.
- They are cheaper and require lower maintenance, but they are usually heavy and bulky.
- They are similar to traditional analog TVs, but are clearer and have higher resolutions.
Rear projection HDTVs
- Rear-projection HDTVs project the image from behind the screen, unlike traditional films where the projector is placed in front.
- They are available in larger screen sizes and support high-resolution images.
Liquid crystal display (LCD) HDTVs
- LCD TVs consist of liquid crystals arranged in a matrix, which can permit or block light to create complex images.
- They provide excellent color and image quality, but are usually more expensive than read-projection TVs.
LCD projection HDTVs
- LCD projection HDTVs also use liquid crystals, but the entire image is projected onto the screen instead of being built from liquid crystals.
- They use a smaller chip instead of three color tubes, which allows more compact designs and larger screen sizes.
Digital light processing (DLP) HDTVs
- DLP HDTVs use a semiconductor chip containing microscopic mirrors, each representing one pixel.
- Each mirror is arranged to produce a specific color and intensity. This results in crisp, sharp images even at large screen setups.
|
view recommended products
Receiver: Choose an HD TV with a tuner or receiver for easier setup and installation. The receiver can be integrated into the set or installed separately. If you have no TV subscriptions, look for an HD-ready set, which can receive HD signals but require a separate tuner from your service provider.
Resolution: Choose a high-resolution HD TV for viewing films and displaying high-quality images. If you frequently play DVDs, look for one with a 720p format to support wide-screen video. |
Are you a manufacturer or supplier? Be listed here! EMAIL US |
Do you have something to add to this guide? If your suggestion passes our editorial standards, we will add it in and acknowledge you as a contributor. |
view recommended products
|
|
QUICK JUMP:
|
