| 摘要 |
Video is steganographically encoded to convey a plural bit message without introducing apparent fixed pattern noise. The video comprises plural frames, each of which includes plural rows of video data. The encoding effects a pattern of changes to a row of original video to yield a row of encoded video. But that row-in a subsequent frame (e.g., the next frame)-is changed by a different pattern. Fixed pattern artifacts are thus avoided. In some arrangements, the frames convey different messages. In others, the frames convey the same message, but the apparent effect is changed by different noise data used in the encoding.
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