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Post by Troy Walters on Jul 3, 2004 10:16:19 GMT
Hi all. Early this year I've came across a news article on about a fantastic new process developed in UK which can decode the colour subcarrier from a B&W kinescope film print!!! The story was at this site www.eetuk.com/features/OEG20020621S0008 but is no longer there. I read that they successfully recovered some of the colour in areas of an early 70s B&W kinescoped Top Of The Pops episode. Anyways I'm searching for more info on this process as I'm interested in knowing more plus one of my mates reckons it's impossible to get colour information from a B&W film. So does anyone here know more about this process of know of sites that elaborate on this process? It will be really interesting to see this process being applied to B&W kinescopes films of early 1950s American TV shows that were initially broadcasted in colour, one example being a 1954 episode of Toast Of The Town (Ed Sullivan Show) and any other early colourcasted shows including the pre-1954 experimental era! Cheers Troy |
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Post by William Martin on Jul 3, 2004 13:28:42 GMT
yup its gone, do you happen to remember how this was done? is it that the subcarrier caused interference on the image or is it similar to the theory I put forward last year about estimating colour from the grey scale in the image?
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Post by H Hartley on Jul 3, 2004 13:40:24 GMT
The only problem you might have is if some keen technician switched off the subcarrier because he knew he would using B/W film. However i believe a 1960s Morcambe & Wise B/W TR came to light recently where it was very evident of a 'dancing' subcarrier on the print.
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Post by William Martin on Jul 3, 2004 13:46:18 GMT
ah right, so its actulay visible on the film. this could make recolourisation a lot cheaper, what about things that were recorded on colour cameras such as the dads army episode room at the bottom(?) does this have a carrier?
and things recorded in b/w but on colour cameras? during 1969?
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Post by Richard Fitzgerald on Jul 3, 2004 16:11:48 GMT
Hi all. Early this year I've came across a news article on about a fantastic new process developed in UK which can decode the colour subcarrier from a B&W kinescope film print!!! The story was at this site www.eetuk.com/features/OEG20020621S0008 but is no longer there. I read that they successfully recovered some of the colour in areas of an early 70s B&W kinescoped Top Of The Pops episode. Anyways I'm searching for more info on this process as I'm interested in knowing more plus one of my mates reckons it's impossible to get colour information from a B&W film. So does anyone here know more about this process of know of sites that elaborate on this process? It will be really interesting to see this process being applied to B&W kinescopes films of early 1950s American TV shows that were initially broadcasted in colour, one example being a 1954 episode of Toast Of The Town (Ed Sullivan Show) and any other early colourcasted shows including the pre-1954 experimental era! Cheers Troy Troy, if you post your query on the Doctor Who Restoration Team forum www.rtforum.co.uk you should be able to get the full details of this proposal as the guy who came up with the theory is a regular there. The other posters are essentially correct - the idea is to take the sub-carrier information that has been recorded on the b&w film and "decode" it to recover the original colour details. Although individual frames can be processed in this way there are practical difficulties in scaling up to recover a whole programme - some people suggest it simply cannot be done. The other main problem is of course that you need the sub-carrier to have been recorded in the first place! Though apart from the example mentioned above I believe the existing b&w prints of Year of The Sex Olympics and Doctor Who's Mind of Evil both have the sub-carrier info on them. |
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Post by richard m on Jul 4, 2004 11:40:16 GMT
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