| Digital broadcasting based on home servers provides various types of viewing styles exploiting metadata provided by broadcasters. In particular, educational broadcasting will benefit because content limited to school use can be distributed freely without the worry of unauthorized use. |
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A gateway*1 installed in a school building issues a digital certificate for the school domain*2, to enable a terminal with a digital certificate to freely access the content.
- The users in the school domain can utilize only metadata with a signature and digital certificate for that domain.
- The use of an expanded CAS*3 function prevents unauthorized use of content outside the school domain.
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This domain management technology will be applied to a content usage scheme for home terminals.
This research is being jointly carried out with Fujitsu Laboratories Ltd.
*1 Gateway: a device to connect networks.
*2 Domain: user management unit over a network.
*3 Conditional Access System (CAS) |
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| >>A large picture |
| Home server based broadcasting will be a network-linked service that allows members-only services over a communications network. One problem is that a user who wishes to use multiple members-only services requiring an authentication by each service provider could be inconvenienced. For this reason, we developed a single sign-on*4 authentication system for network-linked broadcasting services that allows a user to seamlessly utilize different subscription services after a single authentication. |
- A user can access members-only communications services, in addition to the broadcasting service.
- Entering a user ID and password just once will enable sign-in to services of different providers.
- The scheme does not pass on user information registered with one service provider to another, thereby protecting the user's personal information.
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We will develop technologies that simultaneously make services convenient for the user and protect the copyright of service providers. We expect that our efforts will lead to more attractive services for integrated services television.
This research is being jointly carried out wit Nippon Telegraph and Telephone Corporation.
*4 Single sign-on: a mechanism that allows one user verification to cover services provided by many providers. |
We want to stop broadcasting content from being distributed without authorization, such as over the Internet. We are promoting electronic watermarking technology that allows copyright holders to claim their legal rights.
The latest development is a streaming electronic watermarking system to embed streaming content with copyright information.
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- Copyright information can be embedded in the content as electronic watermarking.
- Software to read out the embedded electronic watermark information can be installed in an ordinary personal computer system.
- The software can easily embed copyright information into streaming content as electronic watermarking.
- Electronic watermarking remains even after another coding process is performed (streaming conversion) with a different content compression scheme for network distribution, such as for the Windows Media Player.
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In preparation for implementation, we will develop a user interface that will make the streaming electronic watermarking system easier to use.
Development of this system is being jointly carried out with Mitsubishi Electric Corporation. |
