Patents Assigned to Deutsche Thomson-Brandt GmbH
  • Patent number: 6154429
    Abstract: A device is disclosed for reading from and/or writing to optical recording media, which has a scanner whose output is connected to the input of an analogue-to-digital converter, whose output is in turn connected to the input of a mirror signal detector. The device is able to generate a reliable mirror signal even at relatively high track crossing frequencies. The mirror signal detector has at least one element which is variable as a function of frequency.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: November 28, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Michael Grimm
  • Patent number: 6128152
    Abstract: In an operational mode in which the tape should come to a stop at predetermined positions, a braking process, which causes the stopping of a tape at an exact predetermined place, is provided. At the beginning of the braking process, a target waveform is determined in dependence on the tape speed, and the values of the speed are controlled or regulated in accordance with the waveform. Control of a slow motion mode of a video tape can also be provided.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: October 3, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Philippe Mace
  • Patent number: 6128148
    Abstract: An electronic memory apparatus for a device containing a recording medium for storing information. The device cooperates with a recording or reproducing instrument when said device is disposed therein, and is controllable by a data processing and control circuit. The memory apparatus has a first, programmable memory section, which is alterable by a user of the device, for storing data pertaining to the use of the device, and a second, programmable memory section for storing data pertaining to the characterization of the information which may be recorded on said recording medium.
    Type: Grant
    Filed: March 26, 1996
    Date of Patent: October 3, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Hans-Joachim Platte, Ernst F. Schroder
  • Patent number: 6127911
    Abstract: Transformer comprises a core (K1, K2), a primary winding (W1) and at least one secondary winding (W2), which are arranged as conductors on one or more layers of a flat carrier, and a coil former with a chamber system having chambers (C1, C2), which accommodate the layers with the windings (W1, W2). At least one of the chambers (C1, C2) is closed at least in regions, with the result that long distances for creepage paths are obtained. As a result of this, it is possible to adhere to existing safety regulations for the mains power supply isolation even with very compact dimensions and/or with full utilization of the width available for the conductor tracks. The chamber system can be formed from two or three plastic parts (P1, P2, P3) by mating. The layers with the conductor tracks are routed laterally out of the chamber system in order to make contact with terminals.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: October 3, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Hans-Otto Haller, Gerard Rilly, Jose-I Rodriguez-Duran
  • Patent number: 6121941
    Abstract: Apparatus and method therefor reduces the ratio ft/Za for driving matrix displays where ft represents a signal processing clock frequency and Za represents the number of lines to be displayed on the matrix display. The time interval available for executing signal processing algorithms which drive a matrix display is expanded into time intervals in which a video signal contains no information. The invention is preferably used for driving LCD displays.
    Type: Grant
    Filed: July 26, 1997
    Date of Patent: September 19, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Gangolf Hirtz
  • Patent number: 6122134
    Abstract: An information storage medium has at least a longitudinal bundle comprising three servo tracks (3, 4, 5). The bundle is arranged in consecutive tracking units (T(N)) of a determined longitudinal length. Surfaces of said servo tracks present either a first or a second characteristic (6, 7) and vary in size and distribution inside the tracking units. The bundles may contain longitudinally stored identification information. Methods for obtaining tracking signals indicating a transversal offset between a reading head and the bundle and for retrieving identification information are disclosed. Also methods for obtaining tracking units in which transversal tracking code is combined with distinct information are described.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: September 19, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Jurgen Kaaden, Klaus Oldermann, Peter Mahr, Gerhard Reiner, Bruno Weihs
  • Patent number: 6118737
    Abstract: A device to reproduce data stored on a recording medium 1 in sectors 14, each sector containing an address area 15 and a data area 16 being encoded in a different way. Address areas are decoded and checked by an address checking means 4 which stores data having an incorrect address into a first memory means 5 and data having a correct address into a second memory means 6. Data contained in the second memory means 6 is decoded by a data decoding means 7 in order to be reproduced. Data contained in the first memory means 5 is permitted to be reproduced in case that the number of successive sectors having incorrect address exceeds by one the difference between newly read correct address and the last correct address before the succession of incorrect addresses.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: September 12, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Ingo Hutter
  • Patent number: 6115337
    Abstract: A control unit is used to set a first reading speed and a second reading speed of the information stored on the information medium as a function of a predetermined occupancy of the buffer below its storage capacity, for the purpose of reducing the number of returns. The drive motor which produces the reading speed is connected via a switch to the driver which drives it and, during the reduction of the reading speed to a predetermined value or until the occupancy of the buffer falls below a predetermined occupancy, the power supply to the drive motor which produces the reading speed, is reduced by means of a switch for the purpose of reducing the power consumption. Subcode information is preferably used to synchronize the data in the buffer after an interruption, and the buffer is preferably arranged between a first assembly for the pulse shaping of the signal read from the information medium and a second assembly for error correction.
    Type: Grant
    Filed: December 6, 1995
    Date of Patent: September 5, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Hirohito Takagi, Richard Rutschmann, Olivier Lannuzel
  • Patent number: 6111616
    Abstract: A set of coarse or initial convergence correction values for a model line of projection television receivers is defined in digital form prior to production using a fine grid or grating pattern. The set of coarse convergence correction values is digitally stored in all the receivers of the model line. A receiver-specific set of fine or final convergence correction values is defined in digital form for each receiver in the model line using a coarse grid or grating pattern. In each receiver, the receiver-specific set of fine or final convergence correction values is combined with the stored set of coarse convergence correction values. Convergence correction during subsequent operation of each receiver is based on the combined convergence correction values. Some of the coarse and fine convergence correction values can be located horizontally outside of the visible picture area of the receivers.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: August 29, 2000
    Assignee: Deutsche Thomson Brandt GmbH
    Inventors: Jacques Chauvin, Bernhard Malota, Albert Runtze
  • Patent number: 6108378
    Abstract: The computation-intensive task of motion estimation for video signals is performed by block search methods using apparatus of reduced complexity. Motion estimation is performed by analyzing only specific bits, e.g. one or two MSBs, of the picture element values. These bits are logic-linked by means of EXOR and/or EXNOR functions, and the individual results for different block positions of a current block within a search window are combined. The respective motion vector for the current block is determined by using a minimum or maximum comparison.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: August 22, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Heinz-Werner Keesen
  • Patent number: 6108054
    Abstract: A method and apparatus for obtaining correction values for convergence setting in video projection devices includes calculating the correction values for the individual video lines at least in part by interpolation between correction interpolation point values. The correction interpolation point values are in this case distributed in the form of a grid over the screen area of the video projection device. During the calculation of correction values for the video lines of a first field of the video frame, a respective set of two intermediate or final values for the interpolation is calculated, which set is applicable to neighbouring lines in different video fields, but in each case only one intermediate or final value is used for the convergence correction in the current video line. As a result, optimal convergence correction can be set for each video line without a high memory outlay and without high computing complexity.
    Type: Grant
    Filed: July 18, 1997
    Date of Patent: August 22, 2000
    Assignee: Deutsche Thomson Brandt GmbH
    Inventors: Friedrich Heizmann, Gunter Gleim
  • Patent number: 6104680
    Abstract: The present invention relates to a device for writing to or reading from optical recording media which have data tracks for recording or reading out information. It has a scanning means for scanning the data tracks, a detection means which emits a signal which is modulated in accordance with the information stored on the optical recording medium and a track detector, which generates a mirror signal by means of a reference value transmitter, which mirror signal indicates whether the scanning means is scanning a data track or the region between two tracks. The device is capable of forming a reliable mirror signal without a high outlay. For this purpose, the reference value transmitter is designed as an adaptive reference value transmitter to which the mirror signal is fed as input variable.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: August 15, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Engelbert Laufer, Hirohito Takagi
  • Patent number: 6104694
    Abstract: The invention relates to a reproduction or recording device for optical recording media with which information, data or control signals are reproduced or recorded without an optical recording medium provided as an exchangeable data medium, such as, for example, a CD or a disk for recording information, being inserted in the device and without a special electronic memory being present. According to the invention, a holding apparatus which is provided in the reproduction or recording device for optical recording media for the purpose of holding the exchangeable data medium is designed as an optical recording medium. The holding apparatus, which is driven by the disk turntable even when there is no optical recording medium inserted, is designed as an optical recording medium. The holdin apparatus has an optical recording medium which is designated as puck CD and, in contrast to the exchangeable data medium, is a component part of the device.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: August 15, 2000
    Assignee: Deutsche Thomson Brandt GmbH
    Inventor: Martin Hake
  • Patent number: 6100718
    Abstract: A circuit, for processing high frequency digital signals minimizes radiation interference by reducing voltage swings at the circuit input. This is accomplished by forming circuit input structures, which exhibit very low input impedances. An example of such input circuitry is a common gate amplifier with a diode coupling the source electrode of the common gate amplifier to ground potential and input signal applied to the source electrode. Output signal is derived from the collector of the common gate electrode which has a further diode as a load circuit.
    Type: Grant
    Filed: April 28, 1997
    Date of Patent: August 8, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Phillppe Blaud, Albrecht Rothermel, Rainer Schweer
  • Patent number: 6101314
    Abstract: A digital video recording apparatus comprises a means for receiving a coded video image representative signal comprising components representing spatial frequencies including DC and AC frequency information. A grouping means groups components of substantially the same type to produce grouped signals for recording. A recording means records the grouped signals on a recording medium.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: August 8, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventor: Heinz-Werner Keesen
  • Patent number: 6097163
    Abstract: An apparatus for electron beam deflection in a cathode ray tube, in particular in a picture tube of a television set, comprises a deflection coil arrangement for horizontal and vertical deflection of the electron beam, an auxiliary deflection coil arrangement, by means of which the electron beam can be influenced for the purpose of convergence correction, and a compensation coil arrangement for producing a magnetic compensation field. The compensation coil arrangement is arranged and designed such that the compensation field essentially compensates for the stray magnetic field of the deflection coil arrangement in the physical region of the auxiliary deflection coil arrangement.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: August 1, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Jacques Chauvin, Bernhard Malota, Albert Runtze
  • Patent number: 6094319
    Abstract: It is known in the case of digital helical track recording and replay apparatuses for audio, video and general data to be recorded for pilot tones to be interleaved in the data tracks, for tracking. The interleaving can be carried out simultaneously with the data by frequency decoupling (a) or by superimposition (b). The invention is based on the object of providing a helical track recording and replay system which carries out tracking in a simple manner. According to the invention, the ATF signal is obtained in a filter module, which also carries out the rectification of the filtered-out pilot tones. The two DC voltage levels are interrogated and processed in the servo microcontroller, with A/D converters. Coupled to the rotation of the head drum, pulses are produced by the servo system which switch the ATF conditioning over between direct operation and tracking operation, so that evaluation is achieved by the microcontroller during the fast ATF burst phase.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: July 25, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Dietmar Braeuer, Juergen Kaaden, Gerhard Reiner
  • Patent number: 6088242
    Abstract: A switched mode power supplier having an improved power factor, that is to say a reduced harmonic load on the mains comprising a switch mode power supply with a reduced harmonic load on mains, comprising a mains rectifier being coupled to a charge capacitor and to a series circuit, the series circuit comprising a decoupling element, a primary winding of a transformer, a switching transistor, and an energy storage capacitor coupled in parallel with the primary winding and the switching transistor, with the voltage thereacross being a smoothed DC voltage, the charge capacitor being further coupled to a tap of said primary winding via a second series circuit comprising an inductor and a diode, and the inductor and the diode being connected via a second diode to a point with a fixed voltage.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: July 11, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Reinhard Koegel, Jean-Paul Louvel
  • Patent number: 6088327
    Abstract: In the case of the OFDM method, a large number of modulated carriers are transmitted using frequency division multiplexing, a spectrum having a virtually rectangular shape being produced as a result of the large number of carriers. In order to separate the carriers from one another again in the receiver, a Fast-Fourier-Transformation is carried out, it then being possible to separate each carrier cleanly from the others provided the carriers are exactly orthogonal with respect to one another. The carrier orthogonality can, however, be disturbed by various causes. Furthermore, the wanted signal must be separated from the undesired adjacent channel signals by analog or digital filtering in the receiver. In order to improve carrier and channel separation, the selectivity of the FFT filtering can be increased by enlarging the number of FFT components. However, this normally leads to an undesirably sharp increase in the computation complexity.
    Type: Grant
    Filed: November 17, 1997
    Date of Patent: July 11, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Claus Muschallik, Veit Armbruster
  • Patent number: 6084835
    Abstract: Tracking error signal in an optical read/write device, such as a CD ROM, are fine tuned for deviations in the positions of the lens structure normal to the recorded medium to provide more precise tracking control. Track error signal is developed by means of DPD-TE circuitry, using for example, signals from a four quadrant photodetector. Selected pairs of the signals from the photodetector are summed and the sums are differenced to develop an intermediate signal. The intermediate signal is amplified with a gain proportional the reciprocal of the intensity of light received by the photodetector, and thereafter combined with the track error signal to provide a corrected track error signal.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: July 4, 2000
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Christian Buchler, Lieu Kim Dang