TY - CONF T1 - Video access control via multi-level data hiding T2 - Multimedia and Expo, 2000. ICME 2000. 2000 IEEE International Conference on Y1 - 2000 A1 - M. Wu A1 - Yu,Hong Heather KW - access KW - adaptive KW - algorithms;hidden KW - bits;high KW - conditions;robustness;robustness-capacity KW - control;adaptive KW - data KW - data;video KW - design;user KW - digital KW - embedding;noise KW - encapsulation;multimedia KW - hiding KW - hiding;multi-level KW - information;data KW - processing; KW - QUALITY KW - signal KW - systems;authorisation;data KW - systems;video KW - technique;control KW - tradeoff;system KW - user KW - video;multi-level AB - The paper proposes novel data hiding algorithms and system design for high quality digital video. Instead of targeting on a single degree of robustness, which results in overestimation and/or underestimation of the noise conditions, we apply multi-level embedding to digital video to achieve more than one level of robustness-capacity tradeoff. In addition, an adaptive technique is proposed to determine how many bits are embedded in each part of the video. Besides user data, control information such as synchronization and the number of hidden user bits are embedded as well. The algorithm can be used for applications such as access control JA - Multimedia and Expo, 2000. ICME 2000. 2000 IEEE International Conference on VL - 1 M3 - 10.1109/ICME.2000.869620 ER -