Copy Protection for DVD Video
نویسندگان
چکیده
The prospect of consumer digital versatile disk (DVD) recorders highlights the challenge of protecting copyrighted video content from piracy. We describe the copy protection system currently under consideration for DVD. The copy protection system broadly tries to prevent illicit copies from being made from either the analog or digital I/O channels of DVD recorders. An analog copy protection system is utilized to protect the NTSC/PAL output channel by preventing copies to VHS. The digital transmission of content is protected by a robust encryption protocol between two communicating devices. Watermarking is used to encode copy control information retrievable from both digital and analog signals. Hence, such embedded signals avoid the need for meta-data to be carried in either the digital or analog domains. Finally, the copy protection system provides the capability for one-generation copying. We discuss some proposed solutions and some of the implementation issues that are being addressed.
منابع مشابه
Digital Watermarking for DVD . . .
O ne of the most quoted applications for digital watermarking is in the context of copy-protection of digital (multi-)media. In its most basic form a watermark is used as a single bit that indicates whether or not content is copyrighted. By the nature of a watermark, this copy-protection bit is (theoretically) strongly tied to the content: it can only be removed when the content suffers serious...
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This application-oriented paper discusses the use of electronic watermarks (also called embedded signaling) for copy control. Playback Control and Copy-Once are described. The 'ticket concept' is presented to provide these functionalities. Although the ticket shows similarities with a digital signature, there are essential differences. For instance, the ticket allows typical modifications of th...
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تاریخ انتشار 1999