Video steganography methods avoiding introduction of fixed pattern noise
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United States of America Patent
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Sep 10, 2002
Issued Date -
N/A
app pub date -
Feb 29, 2000
filing date -
Nov 18, 1993
priority date (Note) -
Expired
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Abstract
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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