Patent application number | Description | Published |
20080205207 | Radial Tracking Method and Apparatus for an Optical Information Carrier Format with Non-Uniformly Spaced Tracks - A radial tracking method for an optical information carrier format with non-uniformly spaced tracks is disclosed, wherein a plurality of tracks ( | 08-28-2008 |
20080304389 | Method for Recording Data Having a Distinctive Feature - In the field of content distribution a typical problem is the protection of Digital Rights information (DRM), which is appended to the content and recorded on a record carrier in the form of a corresponding recorded pattern, from tampering by malicious users. According to some known schemes, the protection is implemented by linking the DRM to some physical distinctive feature of the corresponding recorded pattern. From this distinctive feature fingerprint data can be extracted with some conventional method, and used for the authentication of the DRM. The invention proposes a method of recording data wherein variations in the density of the recorded pattern are formed, as result of a perturbation in the recording process, which is a non-controllable substantially random process. | 12-11-2008 |
20090122875 | BUFFERING OF VIDEO STREAM DATA - Buffering of a video stream containing intra frames (I-frames) and inter frames (P-frames, B-frames) is disclosed. A buffer memory is segmented in two parts, a contiguous part for buffering of contiguous frames of the video stream (I-, P- and B-frames), and an intra part for the buffering of intra frames of the video stream. A decoding of the video stream may under normal conditions be done on data read from the contiguous part of the buffer, whereas the decoding of the video stream in a buffer-underrun situation may be done on data read from the intra buffer | 05-14-2009 |
20100034060 | OPTICAL DISC COMPRISING A WATERMARK AND A METHOD AND RECORDER FOR RECORDING SUCH A DISC - A visible pattern is obtained by modulating the digital sum value. Because the digital sum value modulation allows the choice of several different channel bits groups between DC control points, the selection of a group of channel bits resulting in a change of reflection. This creation of a visible pattern is highly suitable for Blueray as the parity preserving property of the channel code guarantees disparity inversion by the DC-control bit, which keeps the DSV excursions between hard limits. As a result only small DSV deliberate variations are required to produce a visual watermark, which will not deteriorate the bit-detection margin of the optical disc. | 02-11-2010 |
20100074085 | RECORDING METHOD AND A RECORDER | 03-25-2010 |
20100118679 | MULTI-LAYER OPTICAL DISCS - An optical record carrier ( | 05-13-2010 |
20100142349 | OPTICAL DISC COMPRISING A WATERMARK AND A METHOD AND RECORDER FOR RECORDING SUCH A DISC - A visible pattern is obtained by modulating the digital sum value. Because the digital sum value modulation allows the choice of several different channel bits groups between DC control points, the selection of a group of channel bits resulting in a change of reflection. This creation of a visible pattern is highly suitable for Blueray as the parity preserving property of the channel code guarantees disparity inversion by the DC-control bit, which keeps the DSV excursions between hard limits. As a result only small DSV deliberate variations are required to produce a grating, which will not deteriorate the bit-detection margin of the optical disc. | 06-10-2010 |