Multi-standard television sets were made for use in the television industry, so that one TV set or monitor could show video content from other television systems. Multistandard is only used with analogue television. In digital television, there are different standards, like DVB, ISDB, and ATSC. However digital multistandard tv set are not existing. Multistandard devices in digital TV may be PC extension card. Phillips produced a

valve A valve is a device or natural object that regulates, directs or controls the flow of a fluid (gases, liquids, fluidized solids, or slurries) by opening, closing, or partially obstructing various passageways. Valves are technically fittings ...

TV set that could receive most 625 line and

819 line 819-line was an analog monochrome TV system developed and used in France as television broadcast resumed after World War II. Transmissions started in 1949 and were active up to 1985, although limited to France, Belgium and Luxembourg. It is associa ...

television systems. In the United Kingdom, there were quite a number of TV sets produced that were capable of receiving both monochrome 405 line and 625 line PAL I broadcasts. These sets usually had a large relay or relays that would switch the circuits, through manual control.

The USSR and PAL in SECAM countries

In the mid-1980s

The Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, it was nominally a federal union of fifteen nationa ...

implemented a program, in which it would be mandatory for new colour TV sets sold to include PAL also, in view to migrating to

PAL Phase Alternating Line (PAL) is a colour encoding system for analogue television. It was one of three major analogue colour television standards, the others being NTSC and SECAM. In most countries it was broadcast at 625 lines, 50 fields (25 ...

. That is why an Australian video tape will play in colour on a Russian TV set. Eventually it became the standard practice for all

SECAM SECAM, also written SÉCAM (, ''Séquentiel de couleur à mémoire'', French for ''color sequential with memory''), is an analog color television system that was used in France, some parts of Europe and Africa, and Russia. It was one of th ...

TV sets made to also accept PAL. This trend gradually propagated throughout SECAM countries, including France itself."PAL-L" being used in some French hotels

NTSC playback in PAL countries

In order to be able to watch American video tapes, the people of Europe started to buy video recorders that would play back an

NTSC The first American standard for analog television broadcast was developed by National Television System Committee (NTSC)National Television System Committee (1951–1953), Report and Reports of Panel No. 11, 11-A, 12–19, with Some supplement ...

video tape and convert the colour component of the video content to PAL, whilst leaving the number of lines the same, and the field rate, slightly slowed down in order to accommodate the exact 64 microsecond line length required for PAL. Newer TV sets would automatically accommodate the 60 Hertz vertical scan rate, and older TV sets needed a manual adjustment of the vertical hold.

DVD The DVD (common abbreviation for Digital Video Disc or Digital Versatile Disc) is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan. The medium can store any kin ...

players give the option of converting the whole signal to PAL standards complete with 50 Hertz scan rate. The results given by a modern DVD player can be quite pleasing when playing back an NTSC DVD.

PAL playback in NTSC countries

In the USA proper, the ability for an American TV set, or DVD player to play back a PAL DVD became widespread in the post Y2K period. By 2009 about 80% of DVD and TV setups in the United States could play a PAL DVD. So now a PAL DVD can be sold in the United States, without the need to issue the DVD, converted into NTSC.

References

{{Reflist Television technology