AM-FM picture carrier beat type noise filters

For the first time, modulation domain filters are proposed for removing beat type noises in video corrupted by unwanted external signals during the transmission process. We demonstrate the effectiveness of our proposed algorithm on picture carrier beat type noise observed in a real-world situation involving the transmission of critical video signals obtained from a traffic monitoring system. We compare and contrast our results with a traditional linear time invariant (LTI) notch filter. The technique can be generalized for removal of a variety of fixed pattern noises characteristic of many infrared and other non-visible wavelength electro-optical detectors. In addition, we provide a theoretical comparison of modulation and frequency domain image representation strategies in the context of digital image filtering.