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Edited on Tue Jan-24-06 02:07 AM by dusmcj
in automated telephone response systems. Call 800-326-3264 to find the Regal Cinema in your area. While the sequence of menus may drive you crazy, the voice recognition itself is pretty successful.
A random sample of credit card help lines and the like will reveal similar systems, all using untrained voice reco.
In short, voice recognition capability exists which can interpret the speech of the mass American public from an audio stream and turn it into text data, at which point it is searchable for keywords.
I'll guess that since voice reco is fairly intensive, harvesting a significant fraction of total domestic American phone call volume would require delayed processing, i.e. they couldn't put together enough compute power to do reco on the calls as they happen, but instead would have to copy the voice data for each call to storage to give themselves enough time to process it. Following that the search on the resulting text would be quick.
My current hobby thought experiment is to figure out how much bandwidth the American telephone system would require for its digitized audio data. I.e., for 300 million Americans making phone calls, how much storage would say 1 second of their phone calls require ?
Oh, by the way, while I work in IT I have no access to either classified data, or to particular information that the average Chinese, Russian, Israeli or Indian graduate student here on a temporary visa doesn't have. They designed and wrote all this stuff to begin with. I.e., for any sniffers reading this, don't trouble yourselves for a moment that I'm giving away state secrets here. Al-Qaeda seems to have folks doing its work who are at least as smart as I am, and probably went to graduate school here just like those nice folks I just listed. In addition, we can all read trade journals.
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