Video signal processing apparatus and video signal processing method

A video signal processing method for a video signal processing apparatus which generates an interpolated frame between a rust frame image and a second frame image, the method comprising:

• a motion vector detection step of comparing the first frame image and the second frame image, and detecting a motion vector for each of a plurality of blocks obtained by dividing a frame image into blocks;
• a scroll vector detection step of detecting. a scroll vector which indicates a uniform motion in an entire frame image based on the detected motion rector;
• a determination step of calculating, for each block in the first frame image a difference between a correlation value in block matching of the block in the first frame image with an area obtained by shifting the block in the second frame image by an amount of the scroll vector, and a correlation value in block matching of the block in the first frame image with an area obtained by shifting the block in the second frame image by an amount of the motion vector of the block, and determining whether frame interpolation using the scroll vector is possible or not based on the calculation result;
• and
• a frame interpolation step of generating an interpolated frame using the scroll vector which indicates a uniform motion in the entire frame image when it is determined in the determination step that the frame interpolation the scroll vector is possible, and generating an interpolated frame using the motion sector detected for each of a plurality of blocks in the motion vector detection step when it is determined that the frame interpolation using the scroll vector is impossible.