精选优质文档-倾情为你奉上Unit 1 Living with technologyThe evolution of video and sound devicesEarly history of TVThe first public TV broadcasts were made in the USA in 1925. Later, in 1928, the first long-distance TV broadcast was made between the UK and the USA. Regular public broadcasting followed shortly afterwards, first beginning on 11 May 1928 in New York and on 20 August 1929 in London.Many different people contributed to the development of TV. Most early TV broadcasts were made using a
