Two great examples of extracting unusual extra info from an old recorded signal. Does anyone know of more?
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2. Recovering advanced teletext with more colors from an old VHS recording. The advanced teletext was supported by few TVs then (in 1995), but the work means it can be seen by more people now. http://text-mode.tumblr.com/post/182010051418/in-1995-some-countries-started-to-broadcast-a-new …pic.twitter.com/VCcNGgg2AC
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3. Apparently there are ways to recover sound based on vibrations of the objects in recorded video – great with high-speed camera, but can work even with regular 60fps video (and be used for spying!). (thx
@adrianholovaty)https://twitter.com/adrianholovaty/status/1085426605403660294?s=21 …Show this thread -
4. Not quite new unexpected info, but re-running the tapes of lunar landings again to achieve higher quality and see meteor activity on the lunar surface more precisely. (Fascinating project!) (thx
@Infoseepage) https://www.computerworld.com/article/2525935/computer-hardware/the-lost-nasa-tapes--restoring-lunar-images-after-40-years-in-the-vault.html …pic.twitter.com/Xrx0CAtV6R
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5. Somewhat similar: playing back recorded audio that couldn’t be played back at the time because the tech didn’t exist yet – includes audio of a few people singing in 1860 (!). (thx
@multikev)https://www.economist.com/babbage/2011/07/12/the-written-sound …Show this thread -
6. Original copies of Mike Oldfield’s album “Tubular Bells” were made near a VLF transmitter and inadvertently contain a secret Morse code transmission – which someone only realized much later. https://hamgear.wordpress.com/2015/03/09/tubular-bells-and-vlf-interference/ … (thx
@yorgle)Show this thread -
7. Of course, in the modern world there are also parallel issues, such as this AOL snafu from a decade ago:https://www.cnet.com/news/aol-apologizes-for-release-of-user-search-data/ …
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