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 19:18:59 GMT
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Viewed:
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2102 times
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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. 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 has 1 Reply:
 | | Re: An interesting diversion - speech!
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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 (...) (26 years ago, 8-Aug-00, to lugnet.robotics)
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Message is in Reply To:
| | An interesting diversion - speech!
|
| 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 (...) (26 years ago, 7-Aug-00, to lugnet.robotics)
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