Every Thursday, the US Patent and Trademark Office publishes pending patent applications. Publication has no bearing on whether a patent will eventually be issued based on the application. Still, issued patents and published applications are often indicators of what people have been thinking about and the kinds of things that individuals or companies believe may be useful to them in the future. Assigned to Intertrust, the first of today's applications describes techniques for defining, using and manipulating rights management data structures. Assigned to Microsoft, the second application describes ways of protecting elementary stream content.
"20060053158, "Techniques for defining, using and manipulating rights management data structures," assigned to Intertrust.
A descriptive data structure provides an abstract representation of a rights management data structure such as a secure container. The abstract representation may describe, for example, the layout of the rights management data structure. It can also provide metadata describing or defining other characteristics of rights management data structure use and/or processing. For example, the descriptive data structure can provide integrity constraints that provide a way to state rules about associated information. The abstract representation can be used to create rights management data structures that are interoperable and compatible with one another. This arrangement preserves flexibility and ease of use without compromising security.
20060036551, "Protecting elementary stream content," asigned to Microsoft.
Protecting elementary stream media content is described. In one aspect, data segments within elementary stream media content are identified. Each data segment includes a single video or audio frame. Encryption boundaries for protecting the payload packets are selected to correspond to data segment boundaries. The elementary stream media content is then protected using the selected encryption boundaries.