[jetherton]

Hey, I'm working on a project for school and I needed to be able to do DTMF detection on a phone so I've made a simple little script and I wanted to share it.

DTMFdetector.py

Here's the usage:

from DTMFdetector import DTMFdetector
dtmf = DTMFdetector()
data = detector.getDTMFfromWAV("audioFile.wav")

It's only made to do DTMF on the phones so it only works for PCM 16bit 8000hz mono WAV files like PyS60 records. Also to get it to work you need to copy over wave.py and chunk.py from a standard Python 2.2 install.

You can find more info on the library here

Please give me feed back. This is my first attempt at making and releasing a library to the public. I'm sure there's lots of room for improvement.

John
<><

[cyke64]

Thanks to you for sharing your source code !

[akrajpal]

Hi,
Its nice to see some development happening on DTMF front.
I have conceived an idea of using DTMF during an active call to share contacts.
It so happens many a times that the calling party requires a phone number and the sharing of this conact detail many times becomes tedias during the call. The phones may not compatable to recieve business cards and you may not have a pen to note the number and so on.
To save the cost of sms and other issues, i have a concept.
While the call is active, I run this application in the background which will send a nd recieve DTMF tones. So when I send a contact or type in a number, the other person would have these numbers captured by the DTMF application.
I wanted to know if some one can help in making this application.
Feedback is welcome.

[croozeus]

Originally Posted by akrajpal

Hi,
Its nice to see some development happening on DTMF front.
I have conceived an idea of using DTMF during an active call to share contacts.
It so happens many a times that the calling party requires a phone number and the sharing of this conact detail many times becomes tedias during the call. The phones may not compatable to recieve business cards and you may not have a pen to note the number and so on.
To save the cost of sms and other issues, i have a concept.
While the call is active, I run this application in the background which will send a nd recieve DTMF tones. So when I send a contact or type in a number, the other person would have these numbers captured by the DTMF application.
I wanted to know if some one can help in making this application.
Feedback is welcome.

AFAIK, all the PyS60 supporting devices can send or receive buisness cards - even during an ongoing call. Do you have a specific device in mind for your application?

[akrajpal]

Hi, thanks for the reply.
The problem is the business caxrds are charged as SMS. Depending on the content of the BC, the more SMS are charged. Imagine if you are internationally roaming, , the SMS charges run a huge cost.
I am trying to looak at an application which will use the existing live call to transmit the DTMF tones as the contact info which will be deciphered by the app on the other side. No exttra cost involved.

[croozeus]

Originally Posted by akrajpal

Hi, thanks for the reply.
The problem is the business caxrds are charged as SMS. Depending on the content of the BC, the more SMS are charged. Imagine if you are internationally roaming, , the SMS charges run a huge cost.
I am trying to looak at an application which will use the existing live call to transmit the DTMF tones as the contact info which will be deciphered by the app on the other side. No exttra cost involved.

Interesting.

Btw, I just noticed that the DTMFdetector.py link in the first post is broken.

Here is the correct URL.
http://johnetherton.com/wp-content/u...MFdetector.zip

Still thinking,

Best Regards,
Croozeus

[sensei.frank]

Originally Posted by jetherton

Hey, I'm working on a project for school and I needed to be able to do DTMF detection on a phone so I've made a simple little script and I wanted to share it.

DTMFdetector.py

Here's the usage:

from DTMFdetector import DTMFdetector
dtmf = DTMFdetector()
data = detector.getDTMFfromWAV("audioFile.wav")

It's only made to do DTMF on the phones so it only works for PCM 16bit 8000hz mono WAV files like PyS60 records. Also to get it to work you need to copy over wave.py and chunk.py from a standard Python 2.2 install.

You can find more info on the library here

Please give me feed back. This is my first attempt at making and releasing a library to the public. I'm sure there's lots of room for improvement.

John
<><

May I know how this program works? Was the mobile phone able to detect DTMF tones, say for example when DTMF tones are generated from the PC/telephone, the mobile phone listening to it was able to detect the tones generated by the PC/telephone and displays the equivalent values to the mobile phone display?

Thank you for your response. I really would like to know because at the moment, I dont have any clues on how to do it and I think you can help me with this. This is for our current project also.

Regards,

Frank

[sensei.frank]

The link you gave seems to be broken. However, I found your latest link <<http://johnetherton.com/projects/pys60-dtmf-detector>>...Currently, Im into studying your code as I need to understand how its being done and do it in Java(hopefully) - crediting your name, of course. Thanks a lot!