Patent ID: 7215380

Claim:
A method for detecting video frame types with median filtering by denoising to distinguish comb factor from impure spots, comprising steps of: inputting pixels in a frame into a processor in order; calculating comb factor values of the pixels in the frame with a function; proceeding median filtering step to determine the comb factor value of each pixel by denoising to distinguish comb factor from impure spots; adding 1 to a counter if the pixel is a comb factor; keeping the counter unchanged if the pixel is not the comb factor; determining frame types according to the counter value and counter threshold value; either transmitting the pixels directly to a video output if the frame type is determined to be a progressive frame type or applying an interlacing process to the pixels prior to transmitting to the video output if the frame type is determined to be interlaced; displaying the pixels on a video display; and.