| 摘要 |
<p>In a conventional technology in which a film mode is determined when IP (interlace/progressive) conversion processing is performed, a large number of frame memory sections, that is, a large amount of memory is required and increases the cost, and it has been difficult to perform stable IP conversion processing on a pull-down signal other than a video signal, having a regularity. A filmmode determination apparatus uses one frame memory section (for storing the image of a previous frame) to calculate the correlation between the images of the current frame and the previous frame and stores only an average of the correlation values of images of past several frames and the determination result(1bit) of the average. Consequently, with a small amount of memory and a simple circuit configuration, the filmmode determination apparatus can determine whether input image is a 32 pull-down signal, a 22 pull-down signal, or a video signal.</p> |
