Whois & Analysis for tvtechnology.com

Digital television (DTV) is the transmission of audio and video by digitally processed and multiplexed signal, in contrast to the totally analog and channel separated signals used by analog television.

Digital TV can support more than one program in the same channel bandwidth.

It is an innovative service that represents the first significant evolution in television technology since color television in the 1950s.

Several regions of the world are in different stages of adaptation and are implementing different broadcasting standards.

Below are the different widely used digital television broadcasting standards (DTB):

Satellite television is a service that delivers television programming to customers (usually paying subscribers) by relaying it from a communications satellite orbiting the Earth directly to the customer's location.

The signals are received via an outdoor parabolic antenna usually referred to as a satellite dish and a low-noise block downconverter (LNB).

A satellite receiver then decodes the desired television programme for viewing on a television set.

Receivers can be external set-top boxes, or a built-in television tuner.

Satellite television provides a wide range of channels and services.

It is the only television available in many remote geographic areas without terrestrial television or cable television service.

Cable television is a system of delivering television programming to paying subscribers via radio frequency (RF) signals transmitted through coaxial cables, or in more recent systems, light pulses through fiber-optic cables.

This contrasts with broadcast television, in which the television signal is transmitted over the air by radio waves and received by a television antenna attached to the television.

FM radio programming, high-speed Internet, telephone services, and similar non-television services may also be provided through these cables.

In telecommunications, broadband is a wide bandwidth data transmission with an ability to simultaneously transport multiple signals and traffic types.

The medium can be coaxial cable, optical fiber, radio or twisted pair.

Broadcasting is the distribution of audio and/or video content or other messages to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a model.

Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuum tube radio transmitters and receivers.

Before this, all forms of electronic communication (early radio, telephone, and telegraph) were , with the message intended for a single recipient.

The term broadcasting, borrowed from the agricultural method of sowing seeds in a field by casting them broadly about, was coined by either KDKA manager Frank Conrad or RCA historian George Clark around 1920 to distinguish this new activity of "one-to-many" communication; a single radio station transmitting to multiple listeners.