Quote:
Originally Posted by murphyv310
Back in 1962-63 British Relay did experiments under Henry Chmiel's wing of interpolating 405 basically doubling up the picture, each line was sampled and fed into a store and then compared with the next transmitted line....
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Can you give a reference for that. The only line store technolgy that I know of from that era was the set of capacitors and switches that the BBC used in the CO6/501 625>405 converter. I suppose it might have been possible with glass or mercury delay lines.
What you are describing is a very simple line doubler. This approach, while impressive on static pictures, can give unpleasant results on moving ones due to interlace.