Patent ID: 7436455

Claim:
A de-interlacing device for generating data of a plurality of corresponding pixels according to data of a plurality of selected pixels in a field of an interlaced image, the device comprising: a first de-interlacing unit; a second de-interlacing unit, wherein the second and first de-interlacing units use different de-interlacing methods; and a pattern recognizing unit for recognizing whether or not the data of the selected pixels has a special pattern, wherein: the pattern recognizing unit outputs the data of the selected pixels to the first de-interlacing unit and then the first de-interlacing unit generates the data of the corresponding pixels accordingly if the data of the selected pixels has the special pattern, the pattern recognizing unit outputs the data of the selected pixels to the second de-interlacing unit and then the second de-interlacing unit generates the data of the corresponding pixels accordingly if the data of the selected pixels does not have the special pattern, the data of the selected pixels comprises luminance values of the selected pixels, and the pattern recognizing unit obtains a vertical difference and a horizontal difference according to the luminance values of the selected pixels, and the data of the selected pixels has the special pattern if the vertical difference after being multiplied by a predetermined value is larger than the horizontal difference.