TV

Television is a widely used telecomunication medium for sending (broadcasting) and receiving moving images, either black and white”) or color , usually accompanied by sound. “Television” may also refer specifically to a television set, television programming or television transmission. The word is derived from mixed latin and greek roots, meaning “far sight”. Since late 1930, the television set has become a common communications receiver in homes, businesses and institutions, particularly as a source of entertainment and news. Since the 1970s, recordings on video cassette, and later, digital media such as DVD, have resulted in the television frequently being used for viewing recorded as well as broadcast material.

A standard television set comprises multiple internal electronic circuits, including those for tuning and decoding broadcast signals. A display device which lacks these internal circuits is therefore properly called a monitor, rather than a television. A television set may be designed to handle other than traditional broadcast or recorded signals and formats, such as closed circuit television (CCTV), digital television (DTV) and high definition television (HDTV).

Around the globe, broadcast television is financed by either government, advertising, licensing (a form of tax), subscription or any combination of these. To protect revenues, subscription TV channels are usually encrypted to ensure that only subscription payers receive the decryption codes to see the signal. Non-encrypted channels are known as free to air.