Patent ID: 7126643

Claim:
A progressive scan method used in a display including a deinterlacer that receives field data of an interlaced scanning format and converts the received field data into frame data of a progressive scanning format, the progressive scan method comprising: receiving pixel data forming field data; determining predetermined pixel windows with respect to respective center pixels that are to be interpolated to empty lines of the field data and computing a standard deviation of pixel data of the lines of the field data other than the empty lines in respective pixel windows and computing the differences between pixel data according to predetermined directions; computing the minimum absolute difference according to predetermined directions; determining a direction corresponding to the minimum absolute difference as a gradient direction among the predetermined directions; detecting a first edge direction where the standard deviation, the differences between pixel data according to the predetermined directions, and the determined gradient direction satisfy a predetermined first edge-determination condition; detecting a final edge direction where the standard deviation, the first edge direction, and the differences between pixel data divided by the first edge direction that is used as an edge boundary satisfy a predetermined second edge-determination condition; and outputting an interpolated value corresponding to the final edge direction as interpolated pixel data.