ROI Encryption for the HEVC Coded Video Contents

Mousa Farajallah (1) , Wassim Hamidouche (1) , Olivier Deforges (1) , Safwan El Assad (1)

1 IETR - Institut d'Électronique et des Technologies du numéRique

In this paper we investigate privacy protection for the HEVC standard based on the tile concept. Tiles in HEVC enable to split the video into independent rectangular regions. Two solutions are proposed to encrypt the tiles containing the Region Of Interest (ROI). The first solution performs encryption at the bitstream level by encrypting all HEVC syntax elements within the ROI tiles. The second solution enables a selective encryption of the ROI tiles under constant bitrate and format compliant requirements. To avoid temporal propagation of the encryption outside the ROI boundaries, caused by inter prediction, the Motion Vectors of no ROI regions are restricted inside the no encrypted tiles in the reference frames. Simulation results show that the proposed solutions perform secured and adaptive encryption of ROI in the HEVC video. Moreover, the bitrate overhead caused by the MVs restriction window varies between 1%-2:5% depending on both the video content and the number of tiles within the frame.

Domaines: Traitement du signal et de l'image [eess.SP]

Mousa Farajallah, Wassim Hamidouche, Olivier Deforges, Safwan El Assad. ROI Encryption for the HEVC Coded Video Contents. 2015 IEEE International Conference on Image Processing, Sep 2015, Québec, Canada. paper ID 388-nXVm-131, ⟨10.1109/icip.2015.7351373⟩. ⟨hal-01147487⟩