Content use management system, content use management method, and client device
First Claim
1. A content usage management system for distributing, via a network, usage control data for controlling a content use in a client apparatus, comprising:
- one or more distribution servers for distributing the usage control data to the client apparatus by a plurality of different distribution methods; and
a distribution management server for determining a distribution method out of the plurality of distribution methods for distributing usage control data of each content according to attributes of said each content, wherein one of the distribution servers distributes the usage control data by the determined distribution method.
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Accused Products
Abstract
A content distribution system 200 distributes a content key and content use conditions for controlling a content use in a client apparatus 110 to the client apparatus 110, via a communication channel 130, from either a multicast distribution server 122 or a unicast distribution server 123. A content distribution management server 121 determines by which distribution methods to send a content key and content use conditions of each content according to an attribute of the content (a compression format, a compression ratio, a content holder, and the like). An encrypted content distribution server 124 distributes only encrypted content whose content key and content use conditions to be distributed by the unicast, and the multicast distribution server 122 distributes encrypted content whose content key and content use conditions are superimposed by the multicast.
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Citations
43 Claims
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1. A content usage management system for distributing, via a network, usage control data for controlling a content use in a client apparatus, comprising:
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one or more distribution servers for distributing the usage control data to the client apparatus by a plurality of different distribution methods; and
a distribution management server for determining a distribution method out of the plurality of distribution methods for distributing usage control data of each content according to attributes of said each content, wherein one of the distribution servers distributes the usage control data by the determined distribution method. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A content usage management method for a server to distribute, via a network, usage control data for controlling a content use in a client apparatus, comprising:
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a distribution method determination step of determining a distribution method for distributing the usage control data of each content according to attributes of said each content; and
a distribution step of distributing the usage control data by the determined distribution method out of the plurality of different distribution methods. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A client apparatus in a content usage management system for distributing, via a network, usage control data for controlling a content use in the client apparatus by one of a plurality of different distribution methods, comprising:
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a content request unit operable to request a content server which distributes content to distribute the content and obtain the content;
a distribution method judgement unit operable to judge a distribution method for the usage control data corresponding to the requested content, according to success or failure of the obtainment of the content distributed from the content server; and
a usage control data obtainment unit operable to obtain the usage control data from a distribution server that distributes the usage control data by the judged distribution method. - View Dependent Claims (31, 32, 33)
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34. A client apparatus in a content usage management system for distributing, via a network, usage control data for controlling a content use in the client apparatus by one of a plurality of different distribution methods, comprising:
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a content obtainment unit operable to obtain content including information indicating a distribution method for usage control data corresponding to said each content from a content server which distributes contents;
a distribution method identification unit operable to extract information indicating the distribution method from the obtained content and identify the distribution method for the usage control data corresponding to said each content based on the extracted information; and
a usage control data obtainment unit operable to obtain the usage control data from a distribution server that distributes the usage control data by the identified distribution method. - View Dependent Claims (35)
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36. A client apparatus in a content usage management system for distributing, via a network, usage control data for controlling a use of content in the client apparatus by one of a plurality of different distribution methods, comprising:
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a method information obtainment unit operable to obtain information indicating a distribution method for each usage control data from a server which determines a distribution method for the usage control management data;
a distribution method identification unit operable to identify the distribution method for the usage control data corresponding to the content based on the information indicating the distribution method; and
a usage control data obtainment unit operable to obtain the usage control data from a distribution server that distributes the usage control data by the identified distribution method. - View Dependent Claims (37)
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38. A server that distributes, via a network, usage control data for controlling a content use in a client apparatus, comprising:
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a distribution method determination unit operable to determine by which one of distribution methods to distribute the usage control data of each content according to attributes of said each content; and
a distribution unit operable to distribute the usage control data by the determined distribution method out of the plurality of different distribution methods. - View Dependent Claims (39)
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40. A program for a server to distribute, via a network, usage control data for controlling a content use in a client apparatus to the client apparatus, the program having a computer execute the following steps:
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a distribution method determination step of determining by which one of distribution methods to distribute the usage control data of each content according to attributes of said each content; and
a distribution step of distributing the usage control data by the distribution method out of the plurality of different distribution methods.
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41. A program for a client apparatus in a content usage management system for distributing, via a network, usage control data for controlling a use of content in the client apparatus by one of a plurality of different distribution methods, the program having a computer execute the following steps:
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a content request step of requesting a content server that distributes content to distribute the content and obtaining the content;
a distribution method judgement step of judging a distribution method for usage control data corresponding to the requested content according to success or failure of the obtainment of the content from the content server; and
a usage control data obtainment step of obtaining the usage control data from a distribution server that distributes the usage control data by the judged distribution method.
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42. A program for a client apparatus in a content usage management system for distributing, via a network, usage control data for controlling a use of content in the client apparatus by one of a plurality of different distribution methods, the program having a computer to execute the following steps:
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a content obtainment step of obtaining content including information indicating a distribution method for usage control data corresponding to each content from a content distribution server that distributes said each content;
a distribution method identification step of extracting information indicating the distribution method from the obtained content and identifying the distribution method for the usage control data corresponding to the content based on the extracted information; and
a usage control data obtainment step of obtaining the usage control data from a distribution server that distributes the usage control data by the identified distribution method.
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43. A program for a client apparatus in a content usage management system for distributing, via a network, usage control data for controlling a use of content in the client apparatus by one of a plurality of different distribution methods, the program having a computer to execute the following steps:
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a method information obtainment step of obtaining information indicating a distribution method for each usage control data from a server that determines the distribution method for the usage control data;
a distribution method identification step of identifying the distribution method for the usage control data corresponding to the content based on the information indicating the usage control data; and
a usage control data obtainment step of obtaining the usage control data from a distribution server that distributes the usage control data by the identified distribution method.
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Specification