The US Patent Office issues new patents on Tuesdays. Issued patents and published applications may be early indicators of the kinds of issues being addressed by inventors and/or the companies for whom they work. Assigned to NEC, the first patent addresses the use of digital watermarks. Assigned to ContentGuard Holdings, the second patent discloses ways of repackaging portions of digital works as new digital works.
6,928,165, "Communication system using digital watermark for synchronizing multiplexed text data to video frames," assigned to NEC Corporation.
A digital video communication system includes, at a source site, an embedding circuit for embedding a digital watermark in a digital video stream to produce a watermarked digital video stream, and a multiplexer for multiplexing a text data stream with the watermarked digital video stream to produce a multiplexed signal. At a sink site, the system includes a demultiplexer for demultiplexing the multiplexed signal for recovering a watermarked digital video stream and a text data stream. A digital watermark detector is provided for detecting the digital watermark embedded in the recovered digital video stream. A synchronizer responds to the detected digital watermark for synchronizing the recovered text data stream to the recovered video stream.
6,928,419, 'Method and apparatus for repackaging portions of digital works as new digital works," assigned to ContentGuard Holdings, Inc.
A method and system for creating a new digital work from one or more existing digital works having parts. A first part of a digital work has first usage rights associated therewith, the first usage rights specifying a particular manner of use for the first part. A second part of a digital work has second usage rights associated therewith, the second usage rights specifying a particular manner of use for the second part. A new digital work is created by combining the first part and the second part as new content and associating new usage rights with the new content. The new usage rights specify a particular manner of use for the new digital work.