MOTION VECTOR DETECTOR AND SUCCESSIVE SCANNING CONVERTER USING THE DETECTOR

摘要

PURPOSE: To improve the accuracy of the reliability judgement of a detected motion vector relating to a motion vector detector for detecting the motion vector for expressing movement between pictures. CONSTITUTION: For divided respective picture element blocks, a correlation value is calculated in a correlation value calculation circuit 4, the motion vector is calculated from the correlation value in a motion vector calculation circuit 5 and the first reliability judgement of the motion vector is performed in a motion vector reliability judgement circuit 6. Then, from the reliability judged result MFij (1) and a motion vector correlation value Mrij for indicating the correlation of the motion vector and the motion vector in the peripheral block calculated in a motion vector correlation value calculation circuit 23, the reliability judgement is performed again. Even when the reliability judgement becomes erroneous in the motion vector reliability judgement circuit 6, by performing the reliability judgement again from the correlation with the motion vector detected in the peripheral block, the reliability judgement can be corrected and the accuracy of the reliability judgement is improved.