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Old 14th Mar 2009, 10:20 am   #9
Synchrodyne
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Join Date: Jan 2009
Location: Papamoa Beach, Bay of Plenty, New Zealand
Posts: 2,943
Default Re: 625-Line Television Broadcast Standards

Quote:
Originally Posted by Mr Hoover View Post
Hi

Read somewhere the 625 line system was initiated in 1946 & some
experimental transmissions from Holland started around 1948/49.
The 1946 timing is confirmed in a comment I have since found at:

http://www.bvws.org.uk/405alive/faq/405_hist.html

To quote:

"The rest of Europe opted for 625 lines, a system devised in 1946 by two German engineers, Möller and Urtel (it appears that the Russians came up independently with a very similar system and if you had set anyone else the problem - to Europeanise the American 525-line standard - they would have come up with something pretty similar). In Geneva a Mr W. Gerber proposed this as a European system and it has remained in use until the present day."

It seems, then, that the Russian version of the 625 line system was more the result of synchronicity than imitation. And that the Russian choice of 6 MHz video bandwidth could simply have been an engineering decision, there being no precisely "right" number for this parameter.

Cheers,
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