reverberation removal

[anechoicmedia]

I'm curious if there might be a way to use an IR to remove some of the
reverberation from an audio file?

for example: a person is interviewed in a reverberant environment on
video using the camera mic

the dialog is difficult to understand due to the fact that the mic was
too far from the speaker and hence the dialog is buried in reverberant
room acoustics

could an IR be taken from the environment with the reverberant acoustics
and later used to subtract out the reverb (to some degree) from the
audio file?

[Sig Blip]

By "IR" do you mean Impulse Response?

Convolutional Reverb units use impulse responses of real rooms. The
important question is if this DSP process is reversible? I don't think
it is but convolution is a reversible process as long as information
isn't being lost like with a low pass filter (LPF).

So while a perfect inverse reconstruction isn't likely, it may be
possible that convolving with an inverse IR would clean up the signal
very similar to how multipath in telecommunications is cleaned up. I
say possible, a lot of work and research would be required to even
find that out. Then, how practical would it be to generate this room
response IR? Normally reverberation measurements use impulses
generated by a loud air pistol or popping a balloon. The exact
placement of speaker and listener would also be critical as would
absorption coefficients such as from people in the room.

Thank you for proposing this fascinating problem. Unfortunately the
solution isn't simple.

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