[78-L] Removing hiss - yet another idea

[Robert M. Bratcher Jr.]

At 11:07 PM 2/8/2010, you wrote:
>This was done over 35 years ago by Richard Burns and David (?) Packard
>in a device called the Packburn.  It had a switching circuit which
>selected the quieter of each groove wall, and then was improved to use
>the combined pair when both are equal.  You could watch the lights
>following the action.  Following the switcher it had a blanker which was
>an impulse de-clicker which removed the click and interpolated the
>missing sound with what preceded and followed it.
>
>And this was long before our mutual friend Lloyd Stickles developed the
>original idea that became CEDAR.  I was at early presentations of all of
>these devices.
>
>Mike Biel  mbiel at mbiel.com

Wow, that sounds interesting!!

>Mark L. Bardenwerper, Sr. wrote:
> > John Wright wrote:
> >
> >> When I'm restoring I start with a stereo file and sometimes see noise in
> >> one channel and not in the other, which is useful, cut'n'paste the good
> >> bit.
> >>
> >> Now,
> >>
> >> David Burnham wrote
> >>
> >> "the main problem with all noise reduction systems: how do you
> >> distinguish between signal and noise? "
> >>
> >>
> >> That got me thinking. If you have two 78s of the same recording the
> >> music is the same, but the noise is different, and likely different all
> >> the way through.
> >>
> >> So has someone invented a computer program that compares the two
> >> recordings and just saves the sound that is COMMON to both? i.e. the
> >> music?
> >>
> >> Let me have a share in the new patent, please :o))
> >>
> >>
> > Isn't that pretty much the same as declicking a mono recording saved in
> > stereo, then combining the 2 tracks?
> >
> >