Teletext and to pad out the fixed packet. The vertical caption position is determined by the packet address. In the case of the Ceefax and ORACLE systems and their successors in the UK, the teletext signal is transmitted as part of the ordinary analog TV signal but concealed from view in the Vertical Blanking Interval (VBI) television lines which do not carry picture information. The teletext signal is digitally coded as 45-byte packets, so the resulting rate is 7,175 bits per second per used lines (41 7-bit 'bytes' per line, on each of 25 frames per second). A teletext page comprises
BBC World Service Service is funded by the United Kingdom's television licence fee, limited advertising and the profits of BBC Worldwide Ltd. The service is also guaranteed £289 million (allocated over a five-year period ending in 2020) from the UK government. The World Service was funded for decades by grant-in-aid through the Foreign and Commonwealth Office of the British Government until 1 April 2014. The controller of BBC World Service, English, is Mary Hockaday. The BBC World Service began in 1932 as the BBC Empire Service, broadcasting on shortwave and aimed principally at English speakers across the British Empire. In his first Christmas