Community Antenna Television
Community antenna television
The transmission of TV programs to the home and office is via coaxial
cable. Since they were already wired into so many homes, cable TV
companies have had great success selling Internet access. Unlike the
other cable service, Internet via cable does not have distance
limitations. Cable television or community antenna television is a
system of providing television to consumers via radio frequency signals
transmitted to televisions through fixed optical fibers or coaxial
cables as different to the over-the-air method used in traditional
television broadcasting in which a television antenna is required.
FM radio programming, high-speed Internet, telephony and similar
non-television services may also be provided. The short form of CATV is
often used to mean Cable TV. It originally stood for Community Antenna
Television from cable television's origins in 1948.
Technology:
Technically, community antenna involves distributing a number of
television channels collected at a central location to subscribers
within a society by means of a branched network of visual fibers or
coaxial cables and broadband amplifiers. As in the case of radio
broadcasting the use of special frequencies allows a lot of channels to
be distributed through the same cable, without separate wires for each.
A Set-top box or the tuner of the TV, VCR or radio selects one channel
from this varied signal. The same program is often at the same time
broadcast by radio waves and distributed by cable.
Other programs may be distributed by cable only. Rules restricting
content are often more calm for cable than for over-the-air TV.
Traditional vs. modern:
Conventional cable TV systems worked strictly by way of analog signals
but many modern cable TV systems also employ the use of digital cable
technology that uses compressed digital signals, allowing them to
provide many more channels than they could with analog alone.
Contemporary cable TV systems also offer other services such as video
on demand, telephony and high-speed data. Cable television is normally
regarded as a natural monopoly and a single provider serves most areas.
A form has to be filled by the broadcasters as liability insurance for
the cable TV industry. Coverage is provided for general liability.
Slander, insult or offense, infringement of copyright, literary title
or slogan, plagiarism, misappropriation or piracy of intellectual
property and invasion of privacy arising out of programming distributed
over the cable system. Coverage is extensive for contractual
accountability with sponsors and advertising agencies and franchise
agreements with public entities.
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