The Interplay between Compression and Security for Image and Video Communication and Adaptation over Networks
- PDF / 119,906 Bytes
- 2 Pages / 600.05 x 792 pts Page_size
- 30 Downloads / 133 Views
Editorial The Interplay between Compression and Security for Image and Video Communication and Adaptation over Networks Enrico Magli1 and Qibin Sun2 1 Dipartimento 2 Institute
di Elettronica, Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy for Infocomm Research, 21 Heng Mui Keng Terrace, Singapore 119613
Correspondence should be addressed to Enrico Magli, [email protected] Received 6 December 2007; Accepted 6 December 2007 Copyright © 2007 E. Magli and Q. Sun. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We are witnessing an unprecedented diffusion of multimedia contents over heterogeneous networks, to desktop and mobile users, with different access bandwidth and qualityof-service requirements and capabilities. Compression is one of the technologies that are making it all possible, by allowing data rate reduction, transcoding, and rate adaptation, which are crucial in the scenario of time-varying communication channels. At the same time, digital rights management is becoming an increasingly important field because of the contents owners’ need to protect the data from unauthorized use and verify their origin; hence comes the need to add security features to compressed multimedia contents. However, the joint provision of compression and security capabilities is not devoid of problems. Although encryption offers a high level of security, it can hinder compression, for example, by altering the statistics of the coefficients to be coded, or the syntax of the compressed file, potentially resulting into a compression loss, or rendering compresseddomain processing difficult or impossible. Other techniques such as data scrambling are more flexible, but also potentially less secure. Recently, there has been a significant amount of research work aimed at finding new ways to integrate data protection techniques into existing and new compression systems, in order to achieve joint compression and security. This integration allows exploiting the hierarchical signal representation in a transform domain, as used by most image and video compression techniques, in order to provide the advanced functionalities required by many modern applications. The forthcoming release of the ISO/IEC JPEG 2000 Part 9 (JPSEC) standard, whose development has witnessed a significant interest from the industry and academia, is an example of how compression and security can coexist and take advantage of each other.
The six selected papers in this special issue provide an up-to-date picture of state-of-the-art research in the field of compression and security, emphasizing the interplay between these two aspects. The first two papers address the provision of security features within the JPEG 2000 image compression framework. Engel et al. in their paper “Format-compliant JPEG2000 encryption in JPSEC: security, applicability, and the impact of compression parameters
Data Loading...
