speech recognition
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Posted by on July 17, 2005, 10:36 am
Please log in for more thread options I am working on a system of PIC microcontrollers in which there will be communication between computer and user. The computer will choose from a menu of Chipcorder messages, but the user or operator, I want to utilize a small vocabulary of spoken words. I am learning that there some speech recognition chips available, and even setting these up I realize is not a trivial task. But I would like to do the experimenting with A/D and DAC and digitizing individual words and working on algorithms for comparing the operators spoken word with a stored template. This might even lead me into pattern recognition and neural network technologies. Has anyone experimented in these areas or set up any type of speech recognition system? | |||||||||||||||||||||||||
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Posted by Rich Grise on July 18, 2005, 4:33 pm
Please log in for more thread options On Sun, 17 Jul 2005 07:36:22 -0700, lvkeegan wrote: I made a sort of "spectrum analyzer" with eight active filters spaced across about 300Hz - 3KHz, kinda like those displays on a "graphic equalizer". I found out that when you take the fundamental out, that each phoneme has a unique spectrum, regardless who's talking! I got hung up on the pattern matching algorithm, however. These days they'd probably do the whole thing with DSP or something. Good Luck! Rich | |||||||||||||||||||||||||
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Posted by Robert Baer on July 20, 2005, 12:47 pm
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Rich Grise wrote: > On Sun, 17 Jul 2005 07:36:22 -0700, lvkeegan wrote:
> > >>I am working on a system of PIC microcontrollers in which there will
>>be communication between computer and user. The computer will choose >>from a menu of Chipcorder messages, but the user or operator, I want to >>utilize a small vocabulary of spoken words. >> >>I am learning that there some speech recognition chips available, and >>even setting these up I realize is not a trivial task. But I would like >>to do the experimenting with A/D and DAC and digitizing individual >>words and working on algorithms for comparing the operators spoken >>word with a stored template. This might even lead me into pattern >>recognition and neural network technologies. >> >>Has anyone experimented in these areas or set up any type of speech >>recognition system? >
Bell called the various phonemes "formants" as i remember.
> > I made a sort of "spectrum analyzer" with eight active filters > spaced across about 300Hz - 3KHz, kinda like those displays on > a "graphic equalizer". I found out that when you take the > fundamental out, that each phoneme has a unique spectrum, > regardless who's talking! I got hung up on the pattern > matching algorithm, however. > > These days they'd probably do the whole thing with DSP > or something. > > Good Luck! > Rich > > They evenhad a kit using various LC resonators that one could combine combinations at selected amplitudes to create these formants - to make the vowels. | |||||||||||||||||||||||||
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Posted by Joe G \(Home\) on July 18, 2005, 4:58 pm
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Checkout Sensory Inc A single chip can do all the PIC work as well as the VR. http://www.sensoryinc.com/ JG >I am working on a system of PIC microcontrollers in which there will
> be communication between computer and user. The computer will choose > from a menu of Chipcorder messages, but the user or operator, I want to > utilize a small vocabulary of spoken words. > > I am learning that there some speech recognition chips available, and > even setting these up I realize is not a trivial task. But I would like > to do the experimenting with A/D and DAC and digitizing individual > words and working on algorithms for comparing the operators spoken > word with a stored template. This might even lead me into pattern > recognition and neural network technologies. > > Has anyone experimented in these areas or set up any type of speech > recognition system? > | |||||||||||||||||||||||||
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Posted by on July 18, 2005, 2:49 pm
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Joe G Thanks very much - this is exciting to see all these features incorporated into the microprocessor itself, ans also their software packages. I wsaved the link and will be studying it carefully. Thanks. Larry Keegan | |||||||||||||||||||||||||
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> be communication between computer and user. The computer will choose
> from a menu of Chipcorder messages, but the user or operator, I want to
> utilize a small vocabulary of spoken words.
>
> I am learning that there some speech recognition chips available, and
> even setting these up I realize is not a trivial task. But I would like
> to do the experimenting with A/D and DAC and digitizing individual
> words and working on algorithms for comparing the operators spoken
> word with a stored template. This might even lead me into pattern
> recognition and neural network technologies.
>
> Has anyone experimented in these areas or set up any type of speech
> recognition system?