Patent ID: 7359007

Claim:
A method of converting a source image frame to generate a destination image frame, the source image frame including a plurality of source scan lines having a plurality of source pixel data, the destination image frame including a plurality of destination scan lines having a plurality of destination pixel data, said method comprising the following steps of: receiving the plural source pixel data using a first clock signal (CLK_src); converting the plural source pixel data into the plural destination pixel data; generating an estimated source horizontal signal (HSYNC_src′) based on a second clock signal (CLK_dst), wherein a clock period of the estimated source horizontal signal is substantially proportional to that of the second clock signal; comparing the estimated source horizontal signal with a source horizontal synchronization signal (HSYNC_src) to generate a comparing result, wherein the source horizontal synchronization signal is relative to the plurality of source scan lines; according to the comparing result, adjusting the second clock signal to generate an adjusted second clock signal; and providing the plural destination pixel data of the destination image frame using the adjusted second clock signal.