Philips SDV5119/27 Glossary, Coaxial, Hdtv High-Definition Television, UHF Ultra high frequency

7 Glossary

A

Antenna

A device, such as a rod or wire, which picks up a received radio frequency signal or radiates a transmitted RF signal.

ATSC (Advanced Television Systems

Committee)

The Advanced Television Systems Committee, Inc., is an international, non-profit organization developing voluntary standards for digital television. The high definition television standards defined by the ATSC produce wide screen 16:9 images up to 1920x1080 pixels in size -- more than six times the display resolution of the earlier standard. However, many different image sizes are also supported, so that up to six standard-definition “virtual channels” can be broadcast on a single 6 MHz TV channel.

C

Coaxial

A single copper conductor, surrounded with a layer of insulation, covered by a surrounding copper shield and finally, an insulating jacket. An unbalanced transmission line with constant impedance. In audio, this type is commonly used for low level, line signals terminated in RCA connectors.

H

HDTV (High-Definition Television)

It is a digital television broadcasting system with higher resolution than traditional television systems (standard-definition TV, or SDTV). HDTV is digitally broadcast; the earliest implementations used analog broadcasting, but today digital television (DTV) signals are used, requiring less bandwidth due to digital video compression.

U

UHF (Ultra high frequency)

In radio or TV broadcasting: it is the frequency range of electromagnetic waves which lies between 300 MHz and 3 GHz (3000 MHz).

V

VHF (Very high frequency)

In radio or TV broadcasting: it is the frequency range of electromagnetic waves which lies between 30 MHz and 300 MHz.

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