OMA DRM mobile stream media rights management system facing multicast service

A multicast service and copyright management technology, which is applied in the branch office to provide special service devices, transmission systems, digital transmission systems, etc., can solve the problems that multicast services cannot be directly applied
CN101567779AInactive Publication Date: 2009-10-28泛联智城(北京)国际科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
泛联智城(北京)国际科技有限公司
Publication Date
2009-10-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a mobile stream media digital rights management system facing a multicast service, which adopts a multilayer encryption mechanism, a video watermark authentication mechanism, a logic grouping mechanism and the like based on compatible OMA DRM 2.0 standard. A multicast user logic grouping mechanism at a server end and a system processing flow of a client joining multicast service stream are the key content of the invention. The system has the advantages that: 1) the system is compatible with OMA DRM 2.0 and provides a solution of content protection for wide application of a mobile multicast stream media service in a third generation mobile communication system; 2) the system provides a multicast receiver logic grouping strategy, reduces bandwidth consumption for transmitting a plurality of secondarily-encrypted content keys and provides support for concurrent users; 3) the system adopts MD5 summary algorithm and the video watermark authentication technology to provide the data integrity and the accuracy verification in the multicast transmission process; and 4) the system embeds a removable watermark sequence into motion vectors of original video data, has low complexity of watermark related operations, and eliminates video quality reduction possibly caused by watermark embedding.
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Description

technical field

[0001] The invention relates to a mobile streaming digital rights management system for multicast services, mainly on the basis of being compatible with the DRM 2.0 standard formulated by OMA (Open Mobile Alliance), adopting mechanisms such as multi-layer encryption, video watermark authentication, logical grouping, etc., to provide Digital rights management functions for mobile multicast streaming media services. technical background

[0002] Streaming media has the characteristics of downloading and playing at the same time, without the need for users to download complete media data, which significantly reduces the waiting time for users to play. Mobile streaming media services have become one of the most important value-added data services for mobile operators. As an important way to transmit streaming media data, multicast has the advantages of saving network bandwidth and can support thousands of users at a lower cost. It has become one of the main appli...

Claims

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