Patent application number | Description | Published |
20080205208 | Optical System With Filtered Push Pull Radial Tracking - The present invention relates to optical system capable of reproducing information from an optical carrier by a main beam (C) for reading information as readable effects on the carrier, and a first (A) and a second (B) auxiliary beam. The optical system is adapted to direct the main beam (C) and the first (A) and second (B) auxiliary beam onto the carrier so that the main beam is positioned on a first track, and the first and second auxiliary beam are oppositely positioned on a second and a third track. The optical system can adjust a push pull (PP) radial error signal from the main beam by a function; ƒ=ƒ(A, B, C), where the function ƒ is dependent upon adjacently positioned readable effects in the first, second and third track i.e. the local optical environment of the main beam. Therefore a filtering or “cleaning” of the push pull signal is performed depending on the local optical environment of the main beam. | 08-28-2008 |
20080232211 | Apparatus and Method For Reference Level Based Write Strategy Optimization - The invention relates to an optical recording apparatus comprising means for optimizing a write strategy in a recording process. The apparatus comprising a radiation source for emitting a radiation beam in accordance with the write strategy, a read unit so as to provide a read signal, a bit detector for providing modulation bits corresponding to the read signal, a processing unit for grouping the modulation bits into modulation bit sequences and for correlating each modulation bit sequence of the read signal to a reference level, the reference level corresponding to the average amplitude of the read signal for a given modulation bit sequence. Average transition shifts of leading and/or trailing edges are determined based on the position of the reference levels, and at least one of the one or more write parameters in the write strategy is optimized in an optimization process based on the relative values of the reference levels. Optionally, the asymmetry of an optical effect may be determined from the reference levels so that the write strategy is optimized based on the asymmetry. | 09-25-2008 |
20080259759 | Optical Disc Having Combined Rom/R Area - A record carrier has information represented by high density read-only marks in a track. The read-only marks ( | 10-23-2008 |
20080267025 | Method of Lens Positioning For Tilt Compensation, Method and Apparatus For Reading And Recording Data Onto An Optical Disc - A method of controlling the positioning of an objective lens of a lens system for controlling an optical beam used in reading and/or recording information from/onto a track of an optical disc, the method comprising steps of detecting modulated optical signals corresponding to the intensity of a reflected optical beam, the reflected optical beam being modulated by the periodic structures of the track of the optical disc, deriving a radial tilt error signal from the modulated optical signals indicative of a radial tilt, wherein the radial tilt refers to the tilt of the objective lens with respect to the optical disc in a radial direction; using the radial tilt error signal for adjusting the position of the objective lens with respect to the optical disc in a radial direction, the method characterized by using the radial tilt error signal for adjusting the position of the objective lens by means of a feedback loop. The radial tilt error signal may be proportional to a cross correlation signal between a Radial Push Pull (RPP) signal and a Central Aperture (CA) signal or a cross correlation signal between a Radial Push Pull (RPP) and a Diagonal Push Pull (DPP) signal. | 10-30-2008 |
20090028022 | SINGLE SPOT CROSS-CORRELATION TRACKING - A tracking error (TE) signal is formed from a single spot on a photodetector | 01-29-2009 |
20090046556 | BIT DETECTION FOR OPTICAL DISC READING - A bit detector ( | 02-19-2009 |
20090073841 | METHOD AND APPARATUS FOR RECORDING DATA ONTO AN OPTICAL DISC - A method of recording information onto an optical disc of the rewritable type, the disc comprising a spiral track, at least part of the track being arranged as a recording area for recording the information, the recording area being further divided into sequential, independently addressable units of pre-determined size, pre-determined numbers of addressable units being grouped in recording unit blocks comprising: deciding for at least an recording unit block that it will be recorded; determining direct overwrite information for said recording unit block, the direct overwrite information comprising information with respect to the number of times the recording unit block was previously recorded; encoding and recording the information into the recording unit block and updating the direct overwrite information for the recording unit block, the direct overwrite information being recorded within the recording unit block. The method also comprise that before recording, reading the said direct overwrite information and adapting Write Strategy and Write Powers accordingly. | 03-19-2009 |
20090097368 | REAL TIME POWER CONTROL FOR OPTICAL RECORDING DRIVES - The invention discloses an optical recording drive for recording data on an optical carrier such as an optical disk of the DVD or BD format. A radiation source is arranged to emit a write pulse train ( | 04-16-2009 |
20090147648 | MAXIMUM LIKELIHOOD SEQUENCE ESTIMATION DECODING - A Maximum Likelihood Sequence Estimator comprises a signal receiver ( | 06-11-2009 |
20090296551 | TRANSITION SHIFT TIMING FOR OPTICAL SIGNAL - A method of determining the transition shift timing in a measured optical signal from an optical recording medium as well as applications of the method in connection with optimizing a write strategy and analyzing the write quality for an optical recording medium are disclosed. The method comprising the step of: providing values of a measured optical signal, providing modulation bits corresponding to the measured optical signal, calculating a model signal by means of an optical channel model, and determining an output timing of the leading and trailing edges from a mathematical model. The method being a recursive method which is continued until a predetermined criterion is fulfilled. The final output is the average transition shifts of the channel bits of the measured CA signal as they are on the optical recording medium. The applications of the method include but are not limited to: a module for determining the average transition shifts, an optical recording apparatus with means for adjusting the write strategy according to the average transition shifts, and an IC for controlling an optical recording apparatus. | 12-03-2009 |
20100027397 | TRACKING BY CROSS CORRELATING CENTRAL APERTURES OF MULTIPLE BEAMS - The present invention provides a method and apparatus for robust tracking at narrow track-pitches on optical discs, enabling higher densities on Blu-ray Discs ( | 02-04-2010 |
20100085849 | OPTICAL DISC DRIVE AND METHOD FOR PREPROCESSING A DISC READ OUT SIGNAL - The present invention discloses an optical drive and a method for preprocessing a disc readout signal r | 04-08-2010 |
20110002350 | METHOD OF CONTROLLING A DIODE DEVICE FOR USE IN OPTICAL STORAGE SYSTEMS - A system and method is provided which compensates for the effects of relaxation oscillations and turn-on delays of diode laser devices. In particular, there is provided a method and system for tuning the shape of the power profile of an output optical signal and its position with respect to a channel bit clock of an optical recording system. | 01-06-2011 |
20110261666 | REAL TIME POWER CONTROL FOR OPTICAL RECORDING DRIVES - The invention discloses an optical recording drive for recording data on an optical carrier such as an optical disk of the DVD or BD format. A radiation source is arranged to emit a write pulse train ( | 10-27-2011 |
20110311119 | PROCESSING IMAGES OF AT LEAST ONE LIVING BEING - A method of processing images of at least one living being, includes obtaining a sequence ( | 12-22-2011 |
20120062787 | CAMERA, SYSTEM COMPRISING A CAMERA, METHOD OF OPERATING A CAMERA AND METHOD FOR DECONVOLUTING A RECORDED IMAGE - A camera and system comprising a camera in which, during exposure, the ratio of the distance between the lens and the sensor and the focal length is changed. The rate of change is set such that motion invariant imaging is achievable for practical speed ranges, i.e. speed of up to at least 5 km/hour at 2 meter distance of the lens, by deconvoluting the compound image. Preferably the achievable speed range is at least twice as high. A linear motion of the sensor is preferred. | 03-15-2012 |
20120127351 | MULTI-SPECTRAL IMAGING - A multi-spectral camera comprises a blocking element ( | 05-24-2012 |
20120162375 | STEREOSCOPIC IMAGE CAPTURING METHOD, SYSTEM AND CAMERA - A camera and camera system is provided with an optical device ( | 06-28-2012 |
20120281879 | Method and System for 2D Detection of Localized Light Contributions - The invention relates to a detection system for determining whether a light contribution of a light source is present at a selected position within a 2D scene. The light contribution includes an embedded code comprising a repeating sequence of N symbols. The detection system includes a camera and a processing unit. The camera is configured to acquire a series of images of the scene via specific open/closure patterns of the shutter. Each image includes a plurality of pixels, each pixel representing an intensity of the light output of the light source at a different physical position within the scene. The processing unit is configured to process the acquired series of images to determine whether the light contribution of the first light source is present at the selected physical position within the scene by e.g. correlating a sequence of pixels of the acquired series corresponding to the selected physical position with the first sequence of N symbols. | 11-08-2012 |
20120281987 | Data Detection For Visible Light Communications Using Conventional Camera Sensor - The invention relates to a detection system for determining data embedded into the light output of a light source in a form of a repeating sequence of N symbols. The detection system includes a camera and a processing unit. The camera is configured to acquire a series of images of the scene via specific open/closure patterns of the shutter. The processing unit is configured to process the acquired series of images to determine the repeating sequence of N symbols. By carefully triggering when a shutter of the camera is open to capture the different symbols of the encoded light within each frame time of a camera, a conventional camera with a relatively long frame time may be employed. Therefore, the techniques presented herein are suitable for detecting the invisible “high frequency” coded light while using less expensive cameras as those used in the prior art. | 11-08-2012 |
20130035599 | RESPIRATORY MOTION DETECTION APPARATUS - The invention relates to a respiratory motion detection apparatus ( | 02-07-2013 |
20140023236 | PROCESSING IMAGES OF AT LEAST ONE LIVING BEING - A method of processing images of at least one living being, includes obtaining a sequence ( | 01-23-2014 |
20140056510 | FACE LOCATION DETECTION - The location of a face is detected from data about a scene. A 3D surface model from is obtained from measurements of the scene. A 2D angle data image is generated from the 3D surface model. The angle data image is generated for a virtual lighting direction, the image representing angles between a ray directions from a virtual light source direction and normal to the 3D surface. A 2D face location algorithm is applied to each of the respective 2D images. In an embodiment respective 2D angle data images for a plurality of virtual lighting directions are generated and face locations detected from the respective 2D images are fused. | 02-27-2014 |
20140168401 | SYSTEM AND METHOD FOR REMOTE MEASUREMENT OF OPTICAL FOCUS - A system and method that measures an optical focus of a distant optical imaging system (EYE), in particular the ocular accommodation of a distant human subject. A luminous pattern of light (P | 06-19-2014 |
20140314420 | Light detection system and method - There is provided a light detection system which is capable of determining in light embedded codes by detecting light in a scene which is illuminated by an illumination system ( | 10-23-2014 |
20140326243 | CUSTOMIZABLE USER INTERFACE DEVICE FOR USE WITH RESPIRATORY VENTILATION SYSTEMS - The present inention provides a cost effective customization of user interface devices for use with respiratory ventilation systems, such as face masks that may be used for CPAP therapy. By integrating a user specific customize element ( | 11-06-2014 |
20140332007 | PATIENT INTERFACE, CUSHION THEREOF, AND MANUFACTURING METHOD - A cushion arrangement for a patient interface (for communicating with the nose or the nose and mouth of a patient) comprises a cushion and a shaping structure in contact with the cushion. The shaping the comprises a thermo-shrink material, and the local dimension of themo-shrink material determines a level of local compression or expansion of the cushion. The shaping structure enables the cushion to be customised for the end user. | 11-13-2014 |
20140373374 | DEVICE FOR FITTING AND DETERMINING THE SIZE OF A PATIENT INTERFACE - The present invention relates to a device for fitting and determining the size of a patient interface, said device ( | 12-25-2014 |