Voice Recognition - Electronic Circuits Projects Diagrams Free

builderz · 4th March 2008, 11:46 AM

I am using a mega32 to enable voice recognition in my robot. im confused about fingerprint generation and comparing of fingerprints in voice signals.

mrmonteith · 4th March 2008, 05:28 PM

Well, I haven't gone that far in making anything similar. But just think about voice as soundwaves with certain patterns. Typically you record the same sound/s repreatedly and try to find changes in frequency, amplitude, etc and see if there is a correllation. Then look for certain spot/s that change. Then you try to make a record of those spots that change as a pattern to look for. Then the next time the system hears that same sound it looks it up in a table and tries to match it.

There are numerous ways that chips do this. Most require lots of A/D sampling and lots of processing power.

Now unless you're planning on spending most of your controllers cycles trying to do this you might be better off on connecting a chip that will do most of that work for you and let the controller decide what to do with the results instead.

Michael

4th March 2008, 11:46 AM	(permalink)
builderz New Member	Voice Recognition I am using a mega32 to enable voice recognition in my robot. im confused about fingerprint generation and comparing of fingerprints in voice signals.

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4th March 2008, 05:28 PM	(permalink)
mrmonteith Experienced Member	Well, I haven't gone that far in making anything similar. But just think about voice as soundwaves with certain patterns. Typically you record the same sound/s repreatedly and try to find changes in frequency, amplitude, etc and see if there is a correllation. Then look for certain spot/s that change. Then you try to make a record of those spots that change as a pattern to look for. Then the next time the system hears that same sound it looks it up in a table and tries to match it. There are numerous ways that chips do this. Most require lots of A/D sampling and lots of processing power. Now unless you're planning on spending most of your controllers cycles trying to do this you might be better off on connecting a chip that will do most of that work for you and let the controller decide what to do with the results instead. Michael