Re:Sound Based Near Field Communication without NFC Chips
by zwieback on Monday June 20, 2011 @10:31PM
(#2677154)
I wonder what the maximum bitrate is, NFC is already pretty slow. Can you get a stable 9600 baud with cellphone speakers and microphones?
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Re:Sound Based Near Field Communication without NFC Chips
by _-af-_ on Monday June 20, 2011 @10:51PM
(#2677218)
It's actually not very flexible. I've seen field trials of this. It is an interesting concept but not very implementable.
You could do the same data transfer by having the phone display a barcode and use a barcode scanner.
They claim that outfitting an existing system with an NFC reader costs $100 to $800. Which is not true. An NFC dongle is under $20. They are looking at costs of NFC stand alone terminals (w/ LCD display, etc.) and that high cost is due to secure element and certifications those have to go through to work w/ Visa/Mastercard networks.
It is an interesting technology and has its uses but not as an NFC replacement.
Re:Sound Based Near Field Communication without NFC Chips
by tgrisfal on Monday June 20, 2011 @10:56PM
(#2677227)
At a guess, you could probably get a few kbits.
But you really would get better results for video. Just using some round numbers from QR codes for an example, 33 px * 33 px * 15 Hz = 16 kbit, which is much more even allowing for the metadata overhead and an error-correcting protocol.