Patent ID: 6097368
Filing Date: 2000-08-01
Classification: G09G

Abstract:
A method for determining an equalization code set for use with a pulse number modulation (PNM) code that is used to display video images on a digital display device, the equalization code set acting to reduce moving pixel distortion (MPD) in the displayed images, the method comprising the steps of:a) determining first and second PNM code values defining a transition between respective first and second gray scale values;b) selecting a first trial equalization code value in the PNM code;c) determining a first objective measure of MPD error in a transition from the first PNM code value to the first trial equalization code value and then to the second PNM code value;d) selecting a second trial equalization code value in the PNM code;e) determining a second objective measure of MPD error in a transition from the first PNM code value to the second trial equalization code value and then to the second PNM code value;f) comparing the first objective measure of MPD to the second objective measure of MPD to determine which of the first and second trial equalization code values has a smaller measure of MPD and assigning the respective trial equalization code value having the smaller measure of MPD as a preferred equalization code value;g) assigning the preferred equalization code value to the equalization code set, whereby the preferred equalization code value replaces the second code value when a transition between the first code value and the second code value is detected.