| 摘要 |
PROBLEM TO BE SOLVED: To provide an image signal processor which can reduce failure of motion detection that occurs upon IP conversion of high speed scrolling screen, and its method. SOLUTION: The processor has a DSP 11. It executes motion detection, which is executed when creating interpolation data for lines without data upon IP conversion, according to the motion detection result of the data created by interpolating between the data of the current field and the data delayed by 2 fields, and between the data of the current field and the data delayed by 1 field, and the motion detection result of the previous field. It creates interpolation data by means of intra-field interpolation from the data delayed by 1 field, for the moving space. As for the static space, it creates interpolation data by means of inter-field interpolation from the current field. When the resulting value of intra-field interpolation and that of inter-field interpolation exceed the certain threshold, then it regards it to be the moving space, and executes intra-field interpolation. When the result of motion detection for the previous field is static, it makes the threshold value larger, and when it is moving, it makes it smaller.
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