| Patent application number | Description | Published |
|---|
| 20080263360 | Generating and matching hashes of multimedia content - Hashes are short summaries or signatures of data files which can be used to identify the file. Hashing multimedia content (audio, video, images) is difficult because the hash of original content and processed (e.g. compressed) content may differ significantly. The disclosed method generates robust hashes for multimedia content, for example, audio clips. The audio clip is divided ( | 10-23-2008 |
| 20090276635 | CONTROLLING DISTRIBUTION AND USE OF DIGITAL WORKS - In order to efficiently prevent the save-and-restore attack on usage rights associated with digital work, these usage rights are protected by a hidden channel. In order to make it a difficult or expensive to manipulate the hidden channel, a device is proposed comprising: writing means ( | 11-05-2009 |
| 20090324199 | GENERATING FINGERPRINTS OF VIDEO SIGNALS - The present invention provides novel techniques for generating more robust fingerprints ( | 12-31-2009 |
| 20100058065 | EXTRACTING AUXILIARY DATA FROM A HOST SIGNAL - The invention relates to extracting and embedding auxiliary data from and to a host signal. In an embodiment, the auxiliary data relates to remotely control of an application or a device, such as an interactive toy. Auxiliary data are extracted from a host signal, by periodically ( | 03-04-2010 |
| 20100225826 | METHOD OF LOCATING A RECEIVER THAT REDISTRIBUTES CONTENT - A method of identifying from a plurality of receivers a receiver which causes a redistribution of content, the method comprising making available a watermarked version of the content to only a subset of the plurality of receivers, determining if the watermarked version is subsequently being distributed, and eliminating one or more receivers from the plurality based on the determination, until the subset comprises only the receiver which causes the redistribution, thereby identifying this receiver. Preferably a binary search algorithm is used. Also a system for distributing content to a plurality of receivers, configured to execute the method. | 09-09-2010 |
