Enrico Magli, CERCOM - Center for Multimedia Radio Communications, Dipartimento di Elettronica - Politecnico di Torino, Corso Duca degli Abruzzi 24 - 10129 Torino - Italy. Ph.: +39-011-5644195 - Fax: +39-
Marco Grangetto, CERCOM - Center for Multimedia Radio Communications, Dipartimento di Elettronica - Politecnico di Torino, Corso Duca degli Abruzzi 24 - 10129 Torino - Italy. Ph.: +39-011-5644195 - Fax: +39-
Gabriella Olmo, CERCOM - Center for Multimedia Radio Communications, Dipartimento di Elettronica - Politecnico di Torino, Corso Duca degli Abruzzi 24 - 10129 Torino - Italy. Ph.: +39-011-5644195 - Fax: +39-
In this paper we address the problem of providing conditional access to video sequences, namely, to generate a low-quality video to be used as preview, which can be decoded at full quality if a decryption key is obtained. We propose and investigate the performance of two different techniques, based on smoothing and separate encoding in the compressed domain, and motion vector perturbation. We show that these techniques are able to provide conditional access to different quality levels of H. 264/AVC video with very small rate overhead, and that their combination can provide different levels of security towards malicious attacks.
Citation:
Enrico Magli, Marco Grangetto, Gabriella Olmo, "Conditional Access to H.264/AVC Video with Drift Control," icme, pp.1353-1356, 2006 IEEE International Conference on Multimedia and Expo, 2006
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