NDLI: On Compression of Encrypted Video

Content Provider	IEEE Xplore Digital Library
Author	Schonberg, D. Chuohao Yeo Draper, S.C. Ramchandran, K.
Copyright Year	2007
Description	Author affiliation: Dept. of EECS, California Univ., Berkeley, CA (Schonberg, D.; Chuohao Yeo)
Abstract	We consider video sequences that have been encrypted uncompressed. Since encryption masks the source, traditional data compression algorithms are rendered ineffective. However, it has been shown that through the use of distributed source-coding techniques, the compression of encrypted data is in fact possible. This means that it is possible to reduce data size without requiring that the data be compressed prior to encryption. Indeed, under some reasonable conditions, neither security nor compression efficiency need be sacrificed when compression is performed on the encrypted data (Johnson et al., 2004). In this paper we develop an algorithm for the practical lossless compression of encrypted gray scale video. Our method is based on considering the temporal correlations in the video. This move to temporal dependence builds on our previous work on memoryless sources, and one- and two-dimensional Markov sources. For comparison, a motion-compensated lossless video encoder can compress each unencrypted frame of the standard "Foreman" test video sequence by about 57%. Our algorithm can compress the same frames, after encryption, by about 33%
Starting Page	173
Ending Page	182
File Size	316566
Page Count	10
File Format	PDF
ISBN	0769527914
ISSN	10680314
DOI	10.1109/DCC.2007.61
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cryptography Video compression Image coding Data security Video sequences Pixel Data compression Protocols Laboratories Testing
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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