Tuesdays the PTO issues new patents. Both of today's Spotlight Patents concern aspects of digital rights management. The first patent is a reissue patent assigned to Sonic IP that addresses a file format for multiple track digital data. Assigned to Samsung (KR), the second patent addresses techniques for improved digital rights management.
RE45,052, "File format for multiple track digital data," assigned to Sonic IP, Inc.
A file for storing digital data with high compression rate stores digital data for video and audio signals in multiple streams interleaved with each other. Each track has a stream descriptor list and a stream data list. The stream descriptor list includes a stream header chunk, a stream format chunk, and a stream name chunk. For a video stream, the stream descriptor list also includes a stream header data chunk if the video stream is under digital rights management (DRM) protection. The file format is compatible with high level data compressing algorithms, such as MPEG-4, which provide data compression ratio about six to ten times higher than a standard DVD format.
8,793,793, "Method and apparatus for improved digital rights management," assigned to Samsung (KR).
A method and apparatus for improved digital rights management is provided.