Detector for detecting pseudo-contour noise and display apparatus using the detector

摘要

The invention provides a detector to detect pseudo-contour noise that appears when gradation display is performed in the subfield method on the display apparatus such as a plasma display panel. The invention also provides a display apparatus which makes use of the detector. The detector (60) detects the probability of pseudo-contour noise appearance as a noise quantity (MPD value), which comprises an MPD calculator (62) to calculate the MPD value, an exclusion area detector (64) to detect an area in which diffusion processing is not performed; and a subtractor (66) to remove an exclusion area from an area for which the MPD value has been determined. The display apparatus comprises the detector (60) and a noise diffusing device (70) to reduce appearance of pseudo-contour noise based on the MPD value.