engaging in anal sex, and Channel 4's digital channel E4, who spoofed it in a set of their own idents and it also was identified by the public for the wrong reasons. In the United States, cable channel MTV changes its presentation every few months. However, since its inception, the logo (the letter "M" with "tv" on the lower right side) has always remained the same. In Japan, the state's public broadcaster NHK has set up an institute, the NHK Broadcasting Culture Research Institute, to preserve historical TV and radio presentations within the country, as well as researches of Japanese broadcasting presentations throughout the years. See also History of BBC television idents TVARK, a website which specialises on TV presentations References External links Channel 4's idents BBC 'Rhythm & Movement' idents TV Live Coverage of past BBC, ITV, Channel 4 and other UK Channels The TV Room