System architecture for a large scale video on demand service
Computer Networks and ISDN Systems - Driving applications for future networks
CRYPTO '93 Proceedings of the 13th annual international cryptology conference on Advances in cryptology
Metropolitan area video-on-demand service using pyramid broadcasting
Multimedia Systems
Transferring color to greyscale images
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
IEEE Computer Graphics and Applications
The LSD Broadcast Encryption Scheme
CRYPTO '02 Proceedings of the 22nd Annual International Cryptology Conference on Advances in Cryptology
Colorization using optimization
ACM SIGGRAPH 2004 Papers
An adaptive edge detection based colorization algorithm and its applications
Proceedings of the 13th annual ACM international conference on Multimedia
Fingerprint multicast in secure video streaming
IEEE Transactions on Image Processing
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Distributing video contents via broadcasting network mechanisms has become a promising business opportunity for the entertainment industry. However, since content piracy is always a serious problem, broadcasted contents must be adequately protected. Rather than implementing sophisticate key-management schemes for access control, an animation broadcast system based on colorization techniques is proposed. In the proposed system, gray-level animation video sequences are delivered via broadcast mechanisms, such as multicast, to reduce the overhead in server processing and network bandwidth. Moreover, color seeds labeled with fingerprint codes are delivered to each client through low-bandwidth auxiliary connections and then used to generate high-quality full-color animations with slight differences between versions received by each client-side device. When a user illegally duplicates and distributes the received video, his identity can be easily found out by examining features extracted from the pirated video. The proposed scheme also shows good resistance to collusion attacks where two or more users cooperate to generate an illegal copy in expectation of getting rid of legal responsibility. The proposed scheme exhibits advantages in network bandwidth, system performance and content security.