Televison

TELEVISION

Work done by:Sara Sousa

Solange Gonçalves

The history of television is both complex and far-reaching, involving the work of many inventors and engineers in several countries over many decades. Initially, work proceeded along two different but overlapping lines of development: those designs employing both mechanical and electronic principles, and those employing only electronic principles. Electromechanical television would eventually be abandoned in favor of fully electronic designs.

History

The origins of what would become today's television system can be traced back to the discovery of the photoconductivity of the element selenium by Willoughby Smith in 1873, the invention of a scanning disk by Paul Gottlieb Nipkow in 1884, John Logie Baird's demonstration of televised moving images in 1926 and Philo Farnsworth's Image dissector in 1927.

History

BBC One (BBC1 until 1997) is the primary television channel of the British Broadcasting Corporation (BBC). It was launched on 2 November 1936 as the BBC Television Service, and was the world's first regular public television service with a high level of image resolution. It was later renamed BBC tv until the launch of sister channel BBC Two in 1964. The channel has an annual budget of £840 million. Along with the BBC's other domestic television stations, it is funded entirely by the licence fee, and therefore shows uninterrupted programming with no commercial advertising. It is currently the most watched television channel in the United Kingdom, ahead of its traditional rival for ratings leadership, ITV1.

Bbc one

The history of BBC television idents starts in the early 1950s, when the BBC first displayed a logo between programmes to identify its service. As new technology has become available, these devices have evolved from simple still black and white images to the sophisticated full colour short films seen today. With the arrival of digital services in the United Kingdom, and with them many more new channels, branding is perceived by broadcasters to be much more important, meaning that idents need to stand out from the competition.

This article describes the development of the BBC's main television channels' identities.

Bbc two

ITV is a public service network of British commercial television broadcasters, set up under the Independent Television Authority (ITA) to provide competition to the BBC. ITV is the oldest commercial television network in the UK. Since 1990 and the Broadcasting Act 1990, its legal name has been Channel 3, the number 3 having no real meaning other than to distinguish it from BBC One, BBC Two and Channel 4 - prior to this, the network had no legal overall name. In part, 3 was assigned as televisions would usually be tuned so that the regional ITV station would be on the third button, the other stations being allocated to that of the number their name contained.

Itv 1

Channel 4 is a UK public-service television broadcaster which began transmissions on 2 November 1982. Although commercially self-funded, it is ultimately publicly owned; originally a subsidiary of the Independent Broadcasting Authority (IBA), the station is now owned and operated by the Channel Four Television Corporation, a public body established in 1990, coming into operation in 1993.

The channel was established to provide a fourth television service to the UK that would break the duopoly of the Licence Fee funded BBC's two established services and the single commercial broadcasting network, ITV. Channel 4 enjoys almost universal coverage in the UK and some neighbouring countries and a significant audience share, despite having seen new competition with the growth of cable, satellite and digital services.

Channel 4

Five is a television channel that broadcasts in the United Kingdom. Launched in 1997, it is the fifth and final national terrestrial analogue television channel to launch. Originally called Channel 5, the station rebranded itself as Five in 2002.

Channel 5

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