Low-distortion detection of pulses superimposed on an unknown an

Details Low-distortion detection of pulses superimposed on an unknown an Low-distortion detection of pulses superimposed on an unknown an

1981-06-04

1983-06-14

Richardson, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

250203R, 307231, 307518, 328114, 358166, 358125, 358213, 364455, 364517, 375 76, H04N 521

Patent

active

043886469

ABSTRACT:
Significant features of interest of each pulse shape, amplitude and time of occurrence characteristics, are preserved in a detection circuit that (1) employs a tapped delay line as part of means for deriving a pedestal signal at the predicted current level of an input signal to the delay line, the level of the pedestal signal being determined by extrapolating the slope and level of a running segment of the past history of the input signal level to the delay line, (2) subtracts the derived pedestal signal level from the actual level of an applied input signal, comprised of pulses superimposed on an unknown and variable background signal, to produce a difference level, (3) indicates the occurrence of a pulse by this difference level being at least equal to a threshold level, (4) selectively applies the applied input signal as the input signal to the delay line when the difference level is below the threshold level, and (5) selectively applies the pedestal signal as an input signal to the delay line when the difference level is at least equal to the threshold level.

REFERENCES:
patent: 3120578 (1964-02-01), Potter et al.
patent: 3444380 (1969-05-01), Webb
patent: 4160272 (1979-07-01), Thomas et al.
patent: 4268863 (1981-05-01), Los
patent: 4334244 (1982-06-01), Chan et al.

Affiliated with

Also associated with

Rating

Low-distortion detection of pulses superimposed on an unknown an does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-distortion detection of pulses superimposed on an unknown an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-distortion detection of pulses superimposed on an unknown an will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-167034