graywolf wrote on Fri, 15 Sep 2006 07:39:11 -0700 > Lets back up a bit here. You have a sensor that has an analog out put. > You send that output to an analog to digital converter. The converter > produces an 8, or 10, or 12, or in this case 22 bit digital > representation of the analog signal. Then that digital > representation is > processed digitally. Note that the analog signal does not change. The > only difference is that the higher bit rates produce a more accurate > representation of the analog signal. There is no magic here, just > technology. > > Rephrasing that, the analog signal is simply broken up into more > digital > pieces, nothing is added to it.
But the analog signal output is not a smooth curve; it is a stepped voltage representing the capture of from 0 to about 50,000 electrons. Sampling at 22 bits will simply give a number of similar outputs for each step where the voltage is the same. The benefit will come from averaging these to reduce noise. At least that is how I envision it... Regards, Jim -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
