Patent ID: 7697071
Filing Date: 2010-04-13
Classification: H04N

Abstract:
1. A device for detecting a display mode of a video signal having a plurality of first pixels corresponding to a first field, a plurality of second pixels corresponding to a second field, and a plurality of third pixels corresponding to a third field, the device comprising: a converter for converting the plurality of second pixels into a plurality of converted pixels of a converted field, the second pixels and the converted pixels respectively belonging to different scan lines; a measurement circuit, coupled to the converter, for generating a first, a second, and a third values according to differences between the converted pixel, the first pixel, and the third pixel; and a decision circuit, coupled to the measurement circuit, for determining the display mode according to the first, second, and third values, the decision circuit comprising an accumulator for respectively accumulating the first, second, and third values to generate a first, a second, and a third accumulation values; wherein the display mode is determined according to at least one of variations of the first, the second and the third accumulation values.