Patent ID: 7327397
Filing Date: 2008-02-05
Classification: H04N

Abstract:
1. An image signal processing apparatus comprising: sequence detection means for calculating a difference value in pixel signal level between a detected pixel in a current field and a detected pixel at the same position in a field which comes one frame behind the current field, with respect to the inputted image signal consist of unit-frames each formed of fields with a first field in the lead and which has been subjected to double-speed conversion, and specifies the first field based on the difference value; motion vector detection means for detecting a motion vector for a field which comes one frame or two frames behind the current field, with respect to the detected pixel in the current field; data calculation means for calculating interpolation pixel data for the detected pixel based on the pixel data of the detected pixel in the current field and the pixel data of each pixel in the field which comes one frame or two frames behind the current field; and image control means for writing the interpolation pixel data into the pixel position obtained by shifting the position of the detected pixel in the current field in a direction along the motion vector, in a field subsequent to the first field, the image control means for sequentially increasing the amount with which the position of the detected pixel is shifted every time the field shifts from the first field to the following fields within a range of a vector quantity of the detected motion vector.