| Author |
Message |
vbbrett
Guest
|
 Posted:
Wed Dec 21, 2005 11:23 pm Post subject:
How to determine between machine and human |
|
|
I'm writing a piece of software that is supposed to determine the
difference between a human voice and something like a fax machine. A
human voice still presents frequencies that could be picked up by an
algorithm looking for a fax machine. Do you any of you guys have a
solution to this problem? Is there some attribute about voice that I
could key in on? There's not much on this topic on the web. Thoughts?
Suggestions?
Brett |
|
| Back to top |
|
 |
Chip Wood
Guest
|
| Posted:
Thu Dec 22, 2005 1:04 am Post subject:
Re: How to determine between machine and human |
|
|
Don't key on the voice, key on the fax. Those are standard
frequencies and hold steady for defined periods, voices
don't.
--
Chip Wood
"vbbrett" <brettsbignose@hotmail.com> wrote in message
news:1135185800.241965.61680@g14g2000cwa.googlegroups.com...
| Quote: | I'm writing a piece of software that is supposed to
determine the
difference between a human voice and something like a fax
machine. A
human voice still presents frequencies that could be
picked up by an
algorithm looking for a fax machine. Do you any of you
guys have a
solution to this problem? Is there some attribute about
voice that I
could key in on? There's not much on this topic on the
web. Thoughts?
Suggestions?
Brett
|
|
|
| Back to top |
|
|
Richard Owlett
Guest
|
| Posted:
Thu Dec 22, 2005 1:17 am Post subject:
Re: How to determine between machine and human |
|
|
Chip Wood wrote:
| Quote: | Don't key on the voice, key on the fax. Those are standard
frequencies and hold steady for defined periods, voices
don't.
|
Search on "formants" |
|
| Back to top |
|
|
Steve Underwood
Guest
|
| Posted:
Thu Dec 22, 2005 1:17 am Post subject:
Re: How to determine between machine and human |
|
|
Richard Owlett wrote:
| Quote: | Chip Wood wrote:
Don't key on the voice, key on the fax. Those are standard
frequencies and hold steady for defined periods, voices
don't.
Search on "formants"
|
Formants? Searching on that would kinda detract from getting the job
done. :-)
FAX tone is one of the easiest things to distinguish. It goes beep beep
beep, with well defined on and off times. Its frequency is close to
1100Hz. When the tone is on, it is always a high percentage of the total
energy in the channel - the only other thing there will be a little
noise. Few signals on the telephone network are easier to distinguish
from voice than that.
Steve |
|
| Back to top |
|
|
|
|
|
|
FAQ
Memberlist
Register
Profile
Log in to check your private messages
Log in