Because various data services are transmitted through DBS Data Channel, it is effective to prepare a conditional access system which can be applied to all the services. Therefore it is desirable to specify same transmission protocol for control of scramble. This paper reports the fundamental construction of the system and the basic function of its elements. The authors also propose here a receiver of this system using IC card, which can be used in common for the various data services

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ディジタル放送において有料放送を行う場合などに使用する限定受信方式について開発の動向、要求条件、システム構成、具体的な方式について述べる。ディジタル放送で送られる各種の信号が統一的に処理できるスクランブル方式として、MPEG-2のトランスポートストリームパケットに対して処理する方式を考え、特にPN信号系列を加算する方式について検討を加える。さらに、デスクランブルを制御するための関連情報を伝送する方式としてMPEG-2多重方式におけるセクション形式を用いて送る方法、受信デコーダの課題として取り外し可能なセキュリティモジュールのインタフェースの標準化項目等について明らかにする。

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スカイパープェクTV!は, 2基の通信衛星 (CS) を通じてテレビ171チャネル, ラジオ106チャネルに及ぶ放送サービス (2000年8月時点) を提供している.CSデジタル放送の特徴である多チャネルの有料放送を行うシステムについて, 送出設備から受信機や顧客サポートまで全体のしくみを説明する.

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With the digitization of broadcasting services and the expansion of broadband infrastructure in recent years, high-quality video-broadcasting service is beginning to be provided over communication media. Furthermore, having an attractive service in which broadcasting and communication cooperate is desirable. We describe a technology and a system for the integrated management and control of various kinds of content distribution, such as real-time broadcasting, broadcasting based on home servers, video on demand, and file downloading, by using the metadata that describes the service control conditions and the content description metadata that conforms to the TV-Anytime Forum specifications.

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For the starting BS digital broadcasting service in december, NHK(Japan Broadcastin Corpration) is currently making prepration for necessary facilities. This paper describes the design concept and structure of BS digital master control system.

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A digital broadcasting system for satellites operating in the 12.5 GHz band has been standardized by the Japanese Telecommunication Technology Council. For the maximum commonality and interoperability of the system with other delivery media, the digital broadcasting system uses technologies based on the internationl standards or recommendation for source and channel coding systems. While for the conditional access system. an original system is adopted to meet service requirements in Japan. This paper introduces outlines of the system, as well as remaining issues to be solved.

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This paper presents an RMP (Rights Management and Protection) system for Digital Broadcasting Based on Home Servers to be used with receivers and home storage devices. We clarified the requirements required for rights protection of contents in Digital Broadcasting Based on Home Servers, and developed an RMP system that meets those requirements. This RMP system enables rights protection and advanced access control (term of validity, usage and charge condition, etc.) of content stored on home storage devices. We have also proposed a method for multiplexing scramble keys synchronous with MPEG-2 TS video packets, to achieve a non-linear playback function of contents encrypted by the developed RMP system. We confirmed that non-linear playback and trick-play function of contents encrypted by the developed RMP system can be processed in real time.

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Smart Cards have been deployed in many different sectors since their invention in 1970. The most prominent feature of Smart Cards is the high security owing to its tamper-resistant and computational capability. In the finance sector, EMV-compliant Smart Cards are widely deployed for usage in credit cards. In addition, tests to ensure functional compatibility and certification processes to evaluate their security are available. Furthermore, in the area of telecommunications, Smart Cards are generally used to identify the mobile phone subscriber; however, recently, their usage has been extended to allow payments using mobile phones. In this article, in addition to case studies of Smart Card deployment ranging from Japanese ATM cards with biometric functionality to telecommunications, transportation, and government uses, trends in security technology that enable Smart Cards are introduced.

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