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Capacity of text marking channel

Low, Steven H. and Maxemchuk, Nicholas F. (2000) Capacity of text marking channel. IEEE Signal Processing Letters, 7 (12). pp. 345-347. ISSN 1070-9908.

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We have proposed earlier watermarking text documents by slightly shifting certain text lines. Such a text line represents a noisy channel, and marking represents the transmission of a signal through this channel. The power of the signal represents the size of the shift and must be small for the marks to be imperceptible. We formulate the channel capacity under a constraint or individual signal power. We show that to achieve the capacity, the shifts should be normally distributed, have maximum power, and adjacent shifts should be negatively correlated.

Item Type:Article
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Low, Steven H.0000-0001-6476-3048
Additional Information:© 2000 IEEE. Manuscript received August 12, 2000. The associate editor coordinating the review of this manuscript and approving it for publication was Prof. R. L. de Queiroz.
Subject Keywords:Channel capacity, copyright protection, text watermarking
Issue or Number:12
Record Number:CaltechAUTHORS:20170810-135348454
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Official Citation:S. H. Low and N. F. Maxemchuk, "Capacity of text marking channel," in IEEE Signal Processing Letters, vol. 7, no. 12, pp. 345-347, Dec. 2000. doi: 10.1109/97.883364 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80227
Deposited By: Linqi Guo
Deposited On:10 Aug 2017 22:39
Last Modified:09 Mar 2020 13:19

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