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Proposal for Representative Set of Usage Rights Signaling States. presented to the Analog Reconversion Discussion Group April 10, 2003 Brad Hunt Chief Technology Officer Motion Picture Association of America. Internet. Rights NOT Preserved. Rights are NOT managed equivalently. Rights
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Proposal for Representative Set of Usage Rights Signaling States presented to the Analog Reconversion Discussion Group April 10, 2003 Brad Hunt Chief Technology Officer Motion Picture Association of America
Internet Rights NOT Preserved Rights are NOT managed equivalently Rights Preserved Analog Reconversion Problem Digital Video Recorder with Analog Inputs Digital Video Recording Function Analog-to-Digital Video Converter Analog Output (in the clear) Device Rendering Protected Digital Content with Usage Rights Information Protected Digital Output (encrypted) Digital Video Recorder with Protected Digital Inputs When protected digital content is converted to an analog signal, the usage rights associated with the content must be carried in the analog output so that the rights can be managed equivalently. The transition to protected digital outputs may be impeded if content delivered through the analog output allows the user to do more than if delivered through the protected digital output.
Assumptions To achieve equivalency, the analog signal should carry the same basic set of content usage rights as those carried by a protected digital signal. The content usage rights carried by the analog signal need not be as comprehensive as those that can be carried by protected digital delivery systems. For example, a protected digital output may convey a rich set of “usage rights” information which may be beyond the capabilities of the analog rights signaling method. Although it might be advantageous to reduce the number of usage rights states carried by the analog signal, they should not be truncated to the point that it disadvantages the use of the protected digital signal. One example of a protected digital signal carrying content usage rights is content being delivered using the 5C Digital Transmission Content Protection system.
Proposed Usage Rights Signaling States Usage State Record Control & Redistribution Control Response No form of copying or redistribution is permitted. A first-generation copy is permitted but redistribution is not permitted. If a copy is made, it must be encrypted and remarked to “Copy No More” to signal no further copying. No further copying or redistribution is permitted as this remarked state identifies an authorized copy of “Copy One Generation” content has been made. Copy Control Not Asserted, No Redistribution Copying is permitted but redistribution is not permitted. If a copy is made, it must be encrypted to prevent redistribution. The absence of any form of rights signaling indicates that no numeric copy or redistribution control is being asserted. 5 Usage States to be Signaled