Subject:
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Re: An interesting diversion - speech!
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 8 Aug 2000 21:39:17 GMT
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Viewed:
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924 times
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John believes the ad copy to be incorrect in the All Electronics catalog, so,
as always, do your research before dropping you money... an informed buyer is
a less disappointed one! :)
Dave
In lugnet.robotics, David C. Pyatt writes:
> I just received my All Electronics Corporation Summer catalog and they have
> the 364 on page 3 for 49.95 as well... it lists a vocabulary of 60
> word/phrases so I would imagine that it is outputting a binary match code for
> the phrases. http://www.allelectronics.com will hook you up with a cool
> source for surplus electronics goodies at good prices.
>
> Dave
>
>
> In lugnet.robotics, John Barnes writes:
> > I spent this weekend interfacing the Sensory Voice Direct 364
> > speech recognition device to the RCX as a sensor.
> >
> > Technically, it wasn't that hard. The device has 8 outputs which
> > switch from a logic 0 to a logic 1 as each of 8 words are detected.
> >
> > Then it leaves the 8th output high and repeats the process for the
> > next 7 words on the remaining 7 outputs.
> >
> > I arranged for each output to have a unique resistor value attached
> > to it to provide equally spaced readings at the RCX end when the
> > connection was configured as passive/raw. The 8th output it given
> > a special half value so that it can be detected by itself for word 8
> > and in conjunction with the other 7 outputs for words 9 - 15.
> >
> > I powered the module from 4 x AA NiMH batteries because I noted
> > that the capacitors on the board are only rated at 6.4 volts so normal
> > 1.5 volt cells, when new, could stress that rating. The unit draws
> > about 40mA most of the time, so rechargeables are a good idea
> > anyhow.
> >
> > Eventually, I revised the interface connection to use 8 MOSFETs
> > (2N7000) to drive the resistor interface to the RCX which removed
> > an unacceptable dependence on the state of charge of the batteries
> > from the RCX's readings.
> >
> > In use, its Ok. Not great, but Ok. It does continuous recognition so
> > it requires a keyword to attract its attention. Then it processes the
> > next word (which may in fact be a phrase) to decide which output
> > to enable.
> >
> > So, with a keyword like "Robot",
> >
> > You train it for things like;
> >
> > Robot - Stop
> > Robot - Go
> > Robot - Turn left
> > Robot - Turn right
> >
> > I say Ok, because it's not quite as good as the literature might lead you
> > to believe. In fact, it cannot distinguish between "left" and "right", (a
> > common problem with people also but for different reasons :) so I biased
> > the training to leFFT and Ri, emphasizing the "FFT" on left and the "I" vowel
> > in right. Then it works fine.
> >
> > The only thing I changed, apart from adding the RCX interface parts was
> > the speaker you get in Sensory's SDK which is a little large. I used a
> > smaller speaker, a flat one from Radio Shack, and also an op-amp on the
> > microphone input so it will work at greater range. The whole thing is
> > installed
> > in a 10 x 10 x 4 big brick.
> >
> > For $50, I just had to know if it would work. On balance, it's an interesting
> > demo, but not really that important. It chews up an RCX input and doesn't
> > work quite as well as I had hoped.
> >
> > email me if you'd like more details.
> >
> > JB
> >
> > The device is available from JDR. Make sure you order the 364 and not the
> > earlier version which doesn't have continuous recognition.
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Message is in Reply To:
 | | Re: An interesting diversion - speech!
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| I just received my All Electronics Corporation Summer catalog and they have the 364 on page 3 for 49.95 as well... it lists a vocabulary of 60 word/phrases so I would imagine that it is outputting a binary match code for the phrases. (URL) will hook (...) (24 years ago, 8-Aug-00, to lugnet.robotics)
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