Patent ID: 8280227

Claim:
A caption removal method for a digital video editing system comprising the following steps: inputting a video frame of a video sequence; providing a high level executing stage, the high level executing stage comprising the following steps: recovering the structural region of the temporal domain in the video frame, further comprising: analyzing and describing the distribution of the structural region of the temporal domain to obtain a most similar block using a rotated block matching algorithm; obtaining an initial position of an interpolation block using an adaptive interpolation algorithm; and adjusting the coordinates of the interpolation block adaptively to obtain a desired recovery block using the rotated block matching algorithm; and recovering the structural region of the spatial domain in the video frame, further comprising: defining that the structural distribution of the spatial domain has characteristics similar to those of an SP-Line curve; performing the rotated block matching algorithm to obtain a first similar block and a second similar block with a fractional structural block; calculating the tangent vector at the center coordinate of the first similar block and the tangent vector at the center coordinate of the second similar block to obtain the SP-Line; and moving the first similar block to the fractional structural block along the SP-Line to generate the recovery structure; and providing a low level executing stage, the low level executing stage comprising the following step: recovering the non-structural region in the video frame, further comprising: determining whether the video frame is a first video frame; recovering the non-structural region in the video frame with smooth propagation when the video frame is determined as the first video frame; and recovering the non-structural region in the video frame with block duplication when the video frame is not determined as the first video frame.