| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for watermarking in a video sequence with enhanced robustness, as compared to the techniques according to prior art. SOLUTION: A method for watermarking in the video image sequence includes the execution steps (11-16) for obtaining a watermarked motion vector, by inserting at least one watermark-in bit in at least one motion vector 51 obtained by the motion estimation between two images in the sequence concerned. The motion vector 51 is identified by a coordinate of the motion vector concerned in a reference space partitioned to complementary zones (Z1, Z2) of two types, each having an identifiable binary value related to the motion vector 51. In this insertion step, as necessary, the coordinate of the motion vector 51 is corrected, and as a result, the vector is positioned to lie within a binary value zone, corresponding to the watermark-in bit to be inserted. COPYRIGHT: (C)2005,JPO&NCIPI |
