| Patent application number | Description | Published |
|---|
| 20080205250 | Operating Optical Drive Using Parameters - The invention relates to operating an optical drive apparatus from parameters read from an associated record carrier. Data-aided adaptation loops are often used in modern communication and storage systems. To ensure fast and robust start-up by ensuring a stable starting point in an adaptation loop and a fast convergence of the adaptation loop, an information data field is provided on, and read from by the drive, an associated optical record carrier. The information data field comprising start-up parameters, the start-up parameters comprising information about recommended write parameters and information related to a resulting channel response for the case when the recommended write parameters are used. In a start-up situation of the optical drive apparatus, the channel response of the bit detector is computed based on the start-up parameters. | 08-28-2008 |
| 20080212448 | Optical System - The present invention relates to an optical system for performing radial tracking on an associated optical record carrier. The optical system contains an actuated radiation-emitting device capable of emitting a main beam for reading and/or recording information as readable effects in the carrier, and at least two auxiliary beams applicable for radial tracking. The tracking is performed from radiation reflected from auxiliary spots, the auxiliary spots being asymmetrically placed with respect to the main spot. The carrier contains readable effects arranged in tracks in one or more spiral(s), where the one ore more spiral(s) are separated by one or more guard band(s) ( | 09-04-2008 |
| 20080259758 | Partial Response Maximum Likelihood Decoding - A partial response maximum likelihood decoder, such as a Viterbi decoder, implements a set of combined states where each combined state can represent at least two states from a plurality of complementary sets of states. For each data symbol and each combined state, a Viterbi processor ( | 10-23-2008 |
| 20080310494 | Leakage Scheme for Receiver - A receiver for processing a transmission signal distorted by a transmission channel is described. The receiver has an adaptive signal processor ( | 12-18-2008 |
| 20080316071 | Modulation Coding with Rll (1,K) and Mtr (2) Constraints - This invention relates to a method of converting a user bitstream into a coded bitstream by means of a runlengh limited (d, k) channel code where the channel code has a constraint of d=1. In order to ensure an improvement in bit detection performance an additional RMTR constraint of r=2 is imposed limiting to two the maximum number of minimum runs allowed by the d=1 constraint. An additional advantage of such a code is a limitation of the back-tracking depth of a Viterbi bit-detector Based on two different k constraints the construction of such d=1 and r=2 codes is disclosed. | 12-25-2008 |
| 20080317140 | Method of Converting a User Bitstream Into Coded Bitstream, Method for Detecting a Synchronization Pattern in a Signal, a Record Carier, a Signal, a Recording Device and a Playback Device - This ID proposes synchronization patterns for RLL codes with a (repeated) minimum transition run (RMTR) constraint, where the synchronization pattern comprises a synchronization pattern-body that contains a characteristic bit-pattern that represents a violation of the RMTR constraint. Using a violation of the RMTR constraint allows for short synchronization patterns. | 12-25-2008 |
| 20090010145 | OPTICAL RECORD CARRIER - The present invention relates to an optical record carrier. The optical record carrier has a plurality of tracks disposed substantially spirally and substantially concentrically, each track being adapted for recording and/or reproducing optically readable effects positioned substantially in a groove. In a first aspect, the plurality of tracks are arranged adjacently in a multi-track spiral on the optical record carrier, and a tracking area between the windings of the multi-track spiral is adapted for providing a radial tracking error signal from the optical record carrier. In a second aspect, the plurality of spirals are arranged in concentric consecutive layers similar to an opinion structure on the optical record carrier with one spiral in each layer, and tracking areas between the said layers of the plurality of spirals are adapted for providing a radial tracking error signal from the optical record carrier. The invention also relates to a corresponding optical apparatus and a method for manufacturing a carrier according to the second aspect. | 01-08-2009 |
| 20090122691 | Locking Aid For High Density Bd-Rom Discs - The present invention relates to information carriers in general and high density discs such as Blu-ray discs in particular. According to the invention a system is provided comprising an information carrier (1) and an apparatus for accessing said information carrier The information carrier having recording unit blocks ( | 05-14-2009 |
| 20090279408 | OPTICAL DATA RECORDING/REPRODUCING SYSTEM PICKING UP MULTIPLE TRACKS BETWEEN GUARD BANDS - The present invention relates to an optical system for performing radial tracking on an optical record carrier ( | 11-12-2009 |
| 20100121217 | DEVICE FOR MEASURING CORE TEMPERATURE - The invention provides a device and system for measuring core ( | 05-13-2010 |
| 20100177624 | OPTICAL SYSTEM WITH A NUMBER OF RADIATION SOURCES - The present invention relates to an optical system for reproducing and/or recording optically readable effects on an associated optical record carrier by means of a number of radiation sources. The number of radiation sources comprises a first radiation source capable of emitting a first radiation beam, and at least a second radiation source capable of emitting at least a second radiation beam. The system further comprises beam dividing means for separating at least the first beam into a first main beam and at least a first auxiliary beam, moreover the system comprises photodetection means capable of detecting reflected light from an associated optical record carrier, wherein the optical system is adapted to perform radial tracking from the reflected light of the at least first auxiliary beam being positioned in a first guard band comprised on the associated carrier, and wherein the number of radiation sources is less than or equal to the number of tracks. | 07-15-2010 |
| 20110105874 | METHOD FOR MEASURING BODY PARAMETERS - A system comprises a capacitive sensing unit for capturing an electrophysiological signal from a body part. The capacitive sensing unit includes a first electrode plate that forms a capacitor with the body part. Motion of the electrode plate with respect to the body part may be detected by a motion sensitive unit mechanically coupled to the capacitive sensing unit. The motion sensitive unit detects motion by self-mixing interferometry. Then, a processing unit rejects the electrophysiological signal if a great displacement of the electrode plate is detected. | 05-05-2011 |
