Has anybody attempted to repair the interference from a GSM cellphone in an audio recording? Are there any DPSs available for that?

Here's what I came up with manual repair:
http://j7n.sytes.net/temp/phone.mp3
http://j7n.sytes.net/temp/phone2.mp3

I've never heard of an automated process to do that. And I doubt it would do a better job than your manual repair.
Well done! What tools did you use ?

The process requires an audio editor whose interface is very familiar to you, unless you plan spending a day or more on it. I think it took me about two hours, but I didn't time it. Repair consisted of selecting each pulse and applying the DC offset command on it. Then I used the pencil tool to redraw the edges.

First select an individual square shaped pulse and experimentally determine the amount of DC correction needed. For stationary transmitters this shouldn't be changing during one session of chat with the base station. Correction should be more painful and less effective if the distance to the cellphone is changing. Keep track on how long each pulse is (27 samples at 48k) and the distance between them: This will help to locate the impulses in complex recordings.

I've been having the same problems when dubbing vhs videos onto my pc - gsm interference - and I live in an apartment, so I have no idea who's phone it is (not mine).



Is it possible to devise some sort of match filter software that can detect this annoying sound (I've managed to isolate it mostly in a separate recording) in a particular recording? That way, at least I'll know if the recording is spoiled or not.

Does anyone know if this mobile phone connecting signal is always the same ?
It would make the audio repair job much easier if the location of the pulses is easily predictable

It's been a while since I did any wireless comms course, but I would expect that the exact timing of the signals depends on which TDMA "slot" the phone is using. Still, it should be possible to implement some sort of "matched filter" to recognize these signals - and maybe even automate the process of removing them.

Anyone else know of such a tool for the pc?