Editing Broadcast television systems (section)

=== Evolution ===
For historical reasons, some countries use a different video system on [[Ultra high frequency|UHF]] than they do on the [[Very high frequency|VHF]] bands. In a few countries, most notably the [[United Kingdom]], television broadcasting on VHF has been entirely shut down. The British [[405-line television system|405-line]] system A, unlike all the other systems, suppressed the upper sideband rather than the lower—befitting its status as the oldest operating television system to survive into the color era (although was never officially broadcast with color encoding). System A was tested with all three color standards, and production equipment was designed and ready to be built; System A might have survived, as NTSC-A, had the British government not decided to harmonize with the rest of Europe on a 625-line video system, implemented in Britain as PAL-I on UHF only.

The French [[819 line]] system E was a post-war effort to advance [[France]]'s standing in television technology. Its 819 lines were almost high definition even by today's standards. Like the British system A, it was VHF only and remained black & white until its shutdown in 1984 in France and 1985 in Monaco. It was tested with SECAM standard in the early stages, but later the decision was made to adopt color in 625-lines L system only. Thus, France adopted system L both on UHF and VHF networks and abandoned system E.

Japan had the earliest working HDTV system ([[Multiple sub-Nyquist sampling encoding|MUSE]]), with design efforts going back to 1979. The country began broadcasting wideband analog [[high-definition video]] signals in the late 1980s using an interlaced resolution of 1,125 lines, supported by the [[Sony HDVS]] line of equipment.

In many parts of the world, analog television broadcasting has been shut down completely, or in process of shutdown; see [[Digital television transition]] for a timeline of the analog shutdown.