The 567-line television system was an experimental late 1940s proposal by

Philips Koninklijke Philips N.V. (), commonly shortened to Philips, is a Dutch multinational conglomerate corporation that was founded in Eindhoven in 1891. Since 1997, it has been mostly headquartered in Amsterdam, though the Benelux headquarters i ...

of the

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

for a European

television Television, sometimes shortened to TV, is a telecommunication medium for transmitting moving images and sound. The term can refer to a television set, or the medium of television transmission. Television is a mass medium for advertisin ...

system, with some test transmissions being made from Eindhoven. The first mention of the system appeared in an article from 1938, published in the Philips' technical bulletin, on a transportable demonstration TV station, running an at 50 fields (25 frames) per second, but no more details were provided. Most of the technology was to be borrowed from the American 525-lines system, the difference being the reduction of horizontal scan frequency from 15,750 to 14,175 Hz. This would have meant that the American sound

carrier frequency In telecommunications, a carrier wave, carrier signal, or just carrier, is a waveform (usually sinusoidal) that is modulated (modified) with an information-bearing signal for the purpose of conveying information. This carrier wave usually has a ...

of 4.5 MHz above the picture carrier would have also been the standard for Europe, and hence a lot more common worldwide. By 1950 some 567-line television sets were built and distributed to Philips employees for home testing. The 567-line system was proposed for international use but never adopted.

Russian Russian(s) refers to anything related to Russia, including: *Russians (, ''russkiye''), an ethnic group of the East Slavic peoples, primarily living in Russia and neighboring countries *Rossiyane (), Russian language term for all citizens and peo ...

engineers had already shown how 525-lines could be easily adapted to a higher resolution by breaking with American 6 Mhz channel bandwidth restrictions and moving the sound carrier up from 4.5 to 6.5 MHz, along with

625-line 625-lines is a standard-definition television resolution used mainly in the context of analog systems. It was first demonstrated by Mark Iosifovich Krivosheev in 1948. Analog broadcast television standards The following International Telecommuni ...

scanning. This 625-line system was eventually approved as

CCIR System D CCIR System D is an analog broadcast television system used in the Commonwealth of Independent States, parts of Eastern Europe and People's Republic of China. Initially known as the I.B.T.O. 625-line system this was the first 625-line system, de ...

Technical details

References

Television technology History of television {{tv-tech-stub