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Welcome to the Frequently Asked Questions (FAQ page). Below, we have tried to answer the most common questions visitors to this our Web site may have. If you find that your question is not answered on this page, please contact us.

What is Conditional Access?

Conditional Access is the process of allowing or denying a user the right to use a data asset in one of a predefined set of ways at any one time. Most commonly, CA Systems are used to manage Pay Television services. They are based on the encryption of the audio-visual material and the management of the keys used to access that material, often using a SmartCard in the receiving device.

In the head end, the CA System will manage a user access rights database, prepare SmartCard configuration messages and deliver high level keys to the SmartCard. They will also manage the delivery of keys and their usage parameters for individual services delivered to the receiver.

Where can I find out about digital TV broadcast systems?

A good starting point is the BSI’s Simplifying the implementation of MPEG CD-ROM. Yu can also read John Watkinson’s “The MPEG Handbook” long recognised as the seminal work on the specifications that are at the core of digital television systems today. The Digital Video Broadcast Project is also a good source of information, as is the main MPEG website.

What is Pervasive Computing?

Also known as Ubiquitous Computing, Ambient Intelligence, Intelligent Spaces or any one of a number of other names, Pervasive Computing is about harnessing the joint capability of multiple embedded processors that surround us in everyday objects. The use of resources such as sensors, computing ability and communications networks means that we could enable more complex and exciting, self-adaptive systems that manage our environment unobtrusively wihtout the need for explicit interaction.