Fast Protection of H.264/AVC by Selective Encryption of CAVLC and CABAC for I & P Frames

Zafar Shahid 1 Marc Chaumont 2 William Puech 2
2 ICAR - Image & Interaction
LIRMM - Laboratoire d'Informatique de Robotique et de Microélectronique de Montpellier
Abstract : This paper presents a novel method for the protection of bitstreams of state-of-the-art video codec H.264/AVC. The problem of selective encryption (SE) is addressed along with the compression in the entropy coding modules. H.264/AVC supports two types of entropy coding modules. Context-adaptive variable length coding (CAVLC) is supported in H.264/AVC baseline profile and context-adaptive binary arithmetic coding (CABAC) is supported in H.264/AVC main profile. SE is performed in both types of entropy coding modules of this video codec. For this purpose, in this paper the encryption step is done simultaneously with the entropy coding CAVLC or CABAC. SE is performed by using the advanced encryption standard (AES) algorithm with the cipher feedback mode on a subset of codewords/binstrings. For CAVLC, SE is performed on equal length codewords from a specific variable length coding table. In case of CABAC, it is done on equal length binstrings. In our scheme, entropy coding module serves the purpose of encryption cipher without affecting the coding efficiency of H.264/AVC by keeping exactly the same bitrate, generating completely compliant bitstream and utilizing negligible computational power. Owing to no escalation in bitrate, our encryption algorithm is better suited for real-time multimedia streaming over heterogeneous networks. It is perfect for playback on handheld devices because of negligible increase in processing power. Nine different benchmark video sequences containing different combinations of motion, texture, and objects are used for experimental evaluation of the proposed algorithm.
Type de document :
Article dans une revue
IEEE Transactions on Circuits and Systems for Video Technology, Institute of Electrical and Electronics Engineers, 2011, 21 (5), pp.565-576
Liste complète des métadonnées

Littérature citée [33 références]  Voir  Masquer  Télécharger

https://hal-lirmm.ccsd.cnrs.fr/lirmm-00603198
Contributeur : William Puech <>
Soumis le : vendredi 24 juin 2011 - 13:57:16
Dernière modification le : jeudi 24 mai 2018 - 15:59:23
Document(s) archivé(s) le : dimanche 25 septembre 2011 - 02:23:12

Fichier

TCSVT2129090.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

  • HAL Id : lirmm-00603198, version 1

Collections

Citation

Zafar Shahid, Marc Chaumont, William Puech. Fast Protection of H.264/AVC by Selective Encryption of CAVLC and CABAC for I & P Frames. IEEE Transactions on Circuits and Systems for Video Technology, Institute of Electrical and Electronics Engineers, 2011, 21 (5), pp.565-576. 〈lirmm-00603198〉

Partager

Métriques

Consultations de la notice

254

Téléchargements de fichiers

1132