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An audiovisual content recorder using a removable hard disk drive

We have developed an audiovisual content recorder using a removable hard disk drive. Protection of digital content recorded on the removable medium is important. Besides a large capacity and a high speed, the hard disk drive has much better features than optical discs, one of which is intelligent enough to make bi-directional authentication in the system. This benefit realizes more flexible and reliable protection of digital content. This paper describes the architecture of the developed audiovisual content recorder, focusing on its content protection technology.