[EE] 24-bit A/D. Are We in the Twilite Zone Here?
Dan Michaels email (remove spam text)
>No this is not the twilite zone at all, infact relality!
>You cna keep the 24bit resoultion and still be OK.
>Note that we are talking of while noise whos bandwidth is infinite in both
>directions and the effective sum of the power is (Zero) think before you
>Ok so what can we do about its, as often we will have this noise flip and
>change the state of a signal, very much unwanted!
>OK remember that the effective power is Z-E-R-O? but at any one time it may
>be at the maximum or at the minimum correct also? So what would happen if
>your where to mix in another while noise source of equal maximum and minimum
>amplitude swings over a period of time? Would there not be a high chance
>that the resultant mixing of these two white noise signals be also or near
>zero for most of the time?
>Now here is the tricky question, over the same infinte period is the
>resultant signal power also zero?
>You will find that this is often called bit jittering!
I think I have the general idea of what you are talking about here.
>From information theory, encryption works because you can take a
non-random bit stream and XOR it with a random stream, and the result
comes out random. Likewise, I have read that you can add a small
amount of random noise to an image that has non-random hash on it,
like streaking, banding, washedout areas, pixellation, etc, and
greatly improve the overall image quality.
So it stands to figure that you can possibly add some random noise
to a waveform that has some non-random interference on it, and
effectively "mask" that interference. I have actually thought
about trying this in the past. Might actually work for small
"nibby" noise, and leave the longer-term waveforms being captured
more or less intact.
Cheers and thanks for the input,
- Dan Michaels
See also: www.piclist.com/techref/io/atod.htm?key=a%2Fd
You must be a member of the
piclist mailing list
(not only a www.piclist.com member) to post to the