Re: Speech recognition system for Home automation.

[RickH <passport@xxxxxxxxxxxxxxxxxxxxx>]

On Sep 9, 7:15 am, Soren <soren.skou.niel...@xxxxxxxxx> wrote:
> Hi,
>
> I'm looking at possibilities of constructing a relatively cheap home
> speech recognition system to turn appliances on and off. As i see it I
> have several options:
>
> - Use a computer:   Pros: Good Software is easy to get, Probably the
> fastest way to get a system. Devices could be run from the serial/
> parallel port.
>                              Cons: Expensive solution for such a
> "simple task". Computer must be dedicated and run all the time = high
> power consumption = expensive.
>
> - Build a system from speech recognition IC's or Microcontrollers:
>                             Pros: Components are relatively cheap, Low
> power consumption, Good recognition rate
>                             Cons: Components are often SMD's (haven't
> found any that are not) which means specialized equipment is to be
> used. Demo/development boards costs too much to justify its use. Maybe
> long development time.
>
> - Buy Specialized solution:
>                             Pros: Plug'n'play
>                             Cons: Extremely expensive, removes the fun
> of DIY :)
>
> What I really need is a robust recognition system that works with
> microphones not placed directly in front of the speaker.. like in the
> corner of the living room.
>
> Does anyone here know of such a system, or tried to develop one? It
> only needs to recognize 5-10 words. It's really a "toy" project.
>
> Thanks,
> Soren

Whatever you do, the quality of the microphone is most critical.  I
would suggest using the Crown pressure zone mics:

http://www.crownaudio.com/mic_web/pzm.htm

A cheap little condenser mic capsule from radio shack (if they even
sell them anymore since they are now a damn cell phone store) would
probably not cut it.