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Speech Recognition and sound cards for use at car
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settra View Drop Down
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    Posted: 02/May/2010 at 1:53pm
Ok guys here is the point.On my car i am using a laptop.I'm generaly a big lover of windows speech recognition and have used it allot on my desktop pc on wich i didint had any probs.
But when it came to my laptop, i had some hard time.Not even it wasent able to understand any of the macros i had create but it was hardly understanding me at all.
So i wonder what is the prob. the slow proccecor?(1ghz 2 cores(netbook)
or the not so good sound card?(general netbook audio card)
the truth is that on my desktop, even though when i have music at full (and its allot) it dosent hear me speaking but it also dont get any commands through the songs lyrics (i have a general desktop audio card),but on the netbook it gets any kind of commands.
So i wonder if its not the proccecor but the sound card, and if so, if i get a ultra card (200+euro) will it be able to understand me on the netbook even in car and with the musc loud??
For any more specifications go ahead and ask me:D
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mmarkoe View Drop Down
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Points: 210 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mmarkoe Quote  Post ReplyReply Direct Link To This Post Posted: 02/May/2010 at 7:11pm

Most Netbooks only have 1 GB RAM and we consider 2 GB the absolute minimum. In addition, the Atom processor is woefully inadequate and finally as you have surmised the built in soundcard is likely not well shielded and is picking up electronic noise.

If you have access to a USB Sound pod this is the least expensive way to upgrade your soundcard. These USB Sound pods are designed specifically for the frequency range of the human voice and are thus ideal for speech recognition.

Even with the USB Sound pod, it is likely you will not be getting good results for speech recognition because of the slow processor and in adequate RAM.

Finally, using speech recognition in the environment of an automobile is not ideal in terms of background noise. You would need a highly noise canceling microphone like the Sennheiser ME3.

Marty Markoe, eMicrophones, Inc.



Edited by mmarkoe - 02/May/2010 at 7:19pm
Marty Markoe, MVP
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settra View Drop Down
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Points: 8 		Post Options Post Options   Thanks (0) Thanks(0)   Quote settra Quote  Post ReplyReply Direct Link To This Post Posted: 03/May/2010 at 7:38am
well. in the future i am planing to use the desktop pc on car.In the meantime i was also considering an external sound card.But the question is. If i have a very good sound card-cpu-microphone. will it be able to understand me even with loud music?(considering that the music outpout will be also the computer)
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Originally posted by settra settra wrote:

well. in the future i am planing to use the desktop pc on car.In the meantime i was also considering an external sound card.But the question is. If i have a very good sound card-cpu-microphone. will it be able to understand me even with loud music?(considering that the music outpout will be also the computer)
The USB sound pods are external sound cards.
 
You will need to define loud music? What is loud for me might not be loud for you. Also, it depends on the environment. If you dictate near windows or walls sound will reverberate off these and if the microphone is not noise canceling enough it will pickup the echos.
 
For typical high noise environments here are the 4 best microphones for accuracy and noise canceling (the Sennheiser MD431II is the most noise canceling). Also, these should be considered close talk microphones. In high noise, they should be 1/2" from your mouth.
  1. Sennheiser MD431II
  2. Sennheiser ME3
  3. Samson Airline 77
  4. Samson Q7 (with windscreen)

Marty
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okey. actually. i hope for this: that the mic wont be near me (it wont be easable seen) like 10-20 inches away from me, and that at least at normal sound (when the max volume of the radio would be 60, then normal is round 30), (And definetly when theres no sounds at all) it will be able to understand me perfectly. what do u think of that? will it be spoiled money or is it worth trying?
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Originally posted by settra settra wrote:

okey. actually. i hope for this: that the mic wont be near me (it wont be easable seen) like 10-20 inches away from me, and that at least at normal sound (when the max volume of the radio would be 60, then normal is round 30), (And definetly when theres no sounds at all) it will be able to understand me perfectly. what do u think of that? will it be spoiled money or is it worth trying?
Forget about it. You are trying to defeat the laws of physics. The further a microphone is from the mouth, a stronger microphone audio signal is required. With a strong pickup signal, every sound (even a fly) can be picked up between the microphone and your mouth. This distorts the audio signal and makes it from difficult to impossible to achieve high speech recognition accuracy.
 
This is why almost everyone uses close talk microphones.
 
Marty
Marty Markoe, MVP
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okey.Thats what i wanted to hear (almost:P) thanks allot man!
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