Apparatus of flexible and common IPMP system for distributing and protecting MPEG-2 content

Abstract

An apparatus of a flexible and common MPEG-2 IPMP system (Intellectual Property Management and Protection) is invented to provide flexibility and interoperability by introducing a IPMP Control Information which includes IPMP Tool List and an optional Tool Container. The IPMP Control Information is put in PSI in MPEG-2 transport stream, and a special PES packet in MPEG-2 program stream. IPMP Stream is defined to carry IPMP information that is to be sent to each individual IPMP tool instance. The concept of Tool Manager, Message Router from MPEG-4 IPMP extension is mapped into MPEG-2 terminal to form MPEG-2 IPMP framework together with introduced IPMP Control Information and IPMP Stream. As a result of this invention, the same protected MPEG-2 content is able to play back by different types of MPEG-2 IPMP terminals, and the same MPEG-2 content can be protected by using different vendors' IPMP system.

Description

technical field [0001] The present invention relates to content distribution and protection in the field of MPEG-2, in particular to such applications where different IPMP (Intellectual Property Management and Protection) terminals consume protected content based on MPEG-2 and different IPMP systems protect the same content . Background technique [0002] Since multimedia data and content can arrive anywhere and at any time, content distribution is becoming more and more necessary. Users appreciate the convenience and flexibility, and the fact that they can enjoy entertainment easily and efficiently. But on the other hand, content owners worry about their property being used illegally. There is a balance between the two sides. [0003] There are many protection techniques such as data encryption, watermarking, etc. for protecting content. These techniques have been implemented in many content distribution applications. It appears that different systems use different kin...

AI Technical Summary

Problems solved by technology

However, there is no real interoperability here since not enough components are defined and the architecture provided by the CA is not flexible enough

[0008] It is very difficult to manufacture the same terminal to play different MPEG-2 content provided by different content providers under such circumstances

In other words, the same protected MPEG-2 content cannot be replayed in a different CA system

[0009] On the other hand, the CA system defines a common scrambling algorithm which makes hardware implementation simple, however, this algorithm makes the whole architecture very rigid

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