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Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

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Re: Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

#101

Post by vonmoltke »

dragonwriter wrote: post #46
vonmoltke wrote: post #10

Earlier quoted context omitted.

> Will you only speak of sensitive subjects in rooms with no windows? That is exactly why almost all DOD secure areas are windowless.

> That is exactly why almost all DOD secure areas are windowless. I'm pretty sure that a bigger factor in why secure facilities have limitations on windows (and especially on ground floor windows) is physical security.

Not really. Non-operator windows do not degrade physical security that much, or really at all if they are not accessible from the ground. It is primarily danger of surveillance that drives the lack of windows.

Re: Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

#105

Post by grkvlt »

joewee wrote: post #48
mvid wrote: post #25

Earlier quoted context omitted.

It might be possible to cancel that noise out. But something like a pink noise generator or an office grey noise generator would probably fool it, the same way it would fool a microphone at distance

This doesn’t work anymore, if it ever did. There is free software capable of isolating audio like a single voice from background noise.

Not sure how this can't work, it's just audio jamming, same as for EM waves.

You just need to broadcast sufficient noise to cover the signal, i.e. the S:N ratio is such that the receiver (crisp packet, microphone, etc.) can no longer see the signal above the noise floor. Now, this might mean broadcasting a loud noise signal, which could overwhelm your (or other friendly) receivers (ears, etc.) so optimal placement of the jamming noise source becomes an issue.

Generally, you want it closer to the threat than you, so that distance attenuation keeps it bearable for you but still jams possible recording devices. Or, introduce high bandwidth noise vibrations into the surfaces of the area you are in, such as windows or walls. Anyway, it's very possible and in use today in secure facilities that must be protected from audio eavesdropping.

Re: Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

#106

Post by grkvlt »

freewilly1040 wrote: post #9
fooker wrote: post #8

Earlier quoted context omitted.

>Thinking atomic bombs :( The same ones which have prevented large scale open military conflicts involving superpowers for the last 60+ years? Atom bombs have likely saved more lives than they have taken, if we had conventional wars with modern technology without MAD.

That’s one read on history. Another is that the world has been tremendously lucky to not have suffered a nuclear holocaust since WWII. Many powerful people have done everything they could to advocate for nuclear bombings in the past 60 years, and we’ve had some extremely close calls with near accidental launches.

I think the thing that saved the world was Stalin's stroke, if he had held onto power for longer he had the right kind of volatile personality to go 'fuck it' and start something..

Re: Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

#108

Post by adrianhel »

JetSpiegel wrote: post #93
abootstrapper wrote: post #88

Earlier quoted context omitted.

Anyone remember the TV show Fringe? I seem to remember them using science fiction tech like that. Life imitates art.

It was capturing telephone touch tones on a plate of glass. Olivia's smartphone could dial based on touch tones, that's totally sci fi these days.

Dialing back based on tones is not sci fi at all. The glass thing is sci fi though. Good stuff!

Re: Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

#109

Post by zerb »

lifeisstillgood wrote: post #47
devoply wrote: post #37

Earlier quoted context omitted.

Some of them do, there are geosynchronous spy satellites. https://www.popsci.com/gaofen-4-worlds-most-powerful-geo-spy... "It may also have a lower resolution video streaming capacity."

Ok I was coming to say "spy satellites at 40,000 km up - I doubt they can see anything. And if the linked article is correct the Chinese satellites up there have a resolution of 50m - good luck finding a crisp packet. But the new generation "might" have a resolution of 1m. which is insane. Then again, good luck knowing which square meter of the 1/3 of the earths surface you can see, has the crisp packet in. I still t…

I guess I stand corrected. But the practicality, as others note, still seems limited.

Re: Algorithm recovers speech from a potato-chip bag filmed through glass (2014)

#110

Post by oreo82 »

mynewtb wrote: post #28
devoply wrote: post #7

Now imagine doing this with a high res satellite anywhere on earth.

Satellites will never get such resolution due to optics and atmosphere. Drones however...

never say never...what you're saying could 'never' happen, already has.
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