| 摘要 |
A method for temporally distributing a watermark signal into a sequence comprising a plurality of original image frames is disclosed. The watermark signal represents an N-bit codeword, where N is greater than or equal to two. For each original image frame in the sequence, a subset of bits is selected from the N-bit codeword and a watermark pattern generated according to the subset of bits. The watermark pattern is combined with the original image frame to produce a watermarked image frame. Over the sequence of original image frames, all bits in the N-bit codeword are selected in at least one of the subsets of bits.
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