More information on the HDTV technology behind the
LG 42LD550 42-Inch 1080p 120 Hz LCD HDTV
What is High Definition TV (HDTV)?
HDTV is a type of DTV service. HDTV provides high resolution programming in a widescreen format. A current analog TV picture provides resolution of up to 480 horizontal lines. An HDTV picture can have up to 1080 lines, allowing for stunning picture detail. Widescreen format refers to an image’s aspect ratio, which is a comparison of screen width to screen height. Analog television has an aspect ratio of 4 by 3, which means the screen is 4 units wide by 3 units high. The aspect ratio of HDTV is 16 by 9, the same as the wide scope of a movie theater screen. HDTV programs can include Dolby digital surround sound, the same digital sound system used in movie theaters and on DVDs.
(Courtesy of www.fcc.gov)
What is an “LCD Display”?
Liquid-crystal display televisions (LCD TV) are television sets that use LCD technology to produce images. LCD televisions are thinner and lighter than CRTs (cathode ray tubes) of similar display size, and allow for larger size screens to maximize your viewing enjoyment!
What makes HDTV better than today’s television?
HDTV offers incredibly detailed, life-like picture quality with up to 5 times the sharpness of today’s television along with digital surround sound capability and a widescreen format. (Consumer Electronics Association)
Why are we switching to DTV?
DTV is more flexible and efficient technology than the current broadcast system, which is an “analog” system. For example, rather than being limited to providing one analog programming channel, a broadcaster will be able to provide a super sharp “high definition” (HDTV) program or multiple “standard definition” DTV programs simultaneously. Providing several program streams on one broadcast channel is called “multicasting.” The number of programs a station can send on one digital channel depends on the level of picture detail, also known as “resolution,” desired in each programming stream. DTV can provide interactive video and data services that are not possible with “analog” technology.
Converting to DTV will also free up parts of the scarce and valuable broadcast airwaves. Those portions of the airwaves can then be used for other important services, such as advanced wireless and public safety services (police, fire departments, rescue squads, etc.).
(Courtesy of www.fcc.gov)
What kinds of TVs are HDTVs?
High-definition TVs can be standard direct-view tubes, slim LCDs and plasma monitors, rear-projection units or front projectors that require separate screens. HD refers to resolution-the horizontal lines that can be displayed on the screen-not the technology upon which the TV is based.
Though the resolution, not the specific technology used makes a TV “HD”, LG’s cutting edge plasmas provide the ultimate viewing experience from 42″ to 60″, including models with 10,000:1 contrast ratio and technology which provides over 40 years (60,000 hours) of picture performance.*
* MTBF
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