Abstract: A device for reproducing a stereoscopic image viewable within an increased observation area, the device including an image display device which displays a plurality of images of an object pixel by pixel from various perspectives, a polarization arrangement for producing a first polarized image associated with a right eye and a second polarized image associated with a left eye of an observer, a lens network spaced directly after the polarization arrangement which directs beams associated with each of the left and right polarized images to the respective left and right eye for representing the object pixel by pixel for observing the stereoscopic image, wherein the lens network and polarization arrangement are arranged such that the stereoscopic image can be perceived in a first region of the observation area without polarized spectacles, and in a second region outside the first region of the observation area, by means of polarized spectacles over the left and right eyes.

Abstract: A line deflection circuit for a television receiver or a switched-mode power supply operate with a switching transistor that is connected in series with the primary winding of a transformer and is periodically switched on and off by a switching voltage. In such a circuit, appreciable turn-on and turn-off losses, which reduce the overall efficiency of the circuit, are produced at the switching transistor, particularly at higher operating frequencies. Within a control circuit a DC voltage source is connected to the base of the switching transistor via a periodically actuated switch element and a coil having a core and a tap. The two parts of the coil are wound in opposite senses, and the tap is connected via a diode to ground or to the emitter of the switching transistor.

Abstract: A cassette drive mechanism for cassettes wherein cassettes can be played back which have different sizes and for which different tape drive systems are otherwise required. By placing the different cassettes into a common cassette receiving device, the adaptation of the drive and tape scanning systems is automatically carried out at the side of the drive mechanism.

Abstract: Method and apparatus for recording a digital signal wherein the recording rate is higher than the available data rate. In such a situation, the available excess recording capability is used for extending the playing time by the existing storage capacity of a magnetic tape is better utilized. In the present embodiment, playback time is increased by use of a constant tape transport speed with part-segmented helical track recording and a bidirectional recording operation during recording and replay.

Abstract: A multiplying amplifier which is controlled in a dB linear manner. Transistors, having a numerical distribution coeffient and having the output voltage to be dB-linearly dependent responsive to a control voltage, are connected to the inputs of a muliplier.

Abstract: An optical recording and/or playback system having tracking and focus regulating circuits. Mechanical shock and/or disc defects are detected and the adverse effects on the tracking and focus regulating circuits are reduced.

Abstract: The invention relates to a switched-mode power supply having a switching transistor which periodically switches through a voltage which is applied to a primary winding of a transformer, having a base current network and having a switching stage for operating the switching transistor, and having a control stage for stabilizing a secondary voltage, the switching transistor having a switched-on phase, an off phase and an oscillation phase during operation. The switching transistor (TP20) of the switched-mode power supply according to the invention is switched through step by step during switching on, via a high-resistance resistor (RP05, RP06, RP07), a primary winding (6, 7) and a capacitor (CP24) . After this, the switched-mode power supply oscillates autonomously via this winding (6, 7) and is controlled by the control stage (TP24) .

Abstract: A drive mechanism for driving independently a first and a second coaxial reel, uses only a single rotatable driving unit for driving both coaxial reels. Independent drive is achieved by reversing the rotation of the driving unit.

Abstract: An arrangement for monitoring an alternating signal with respect to its state as mark-to-space ratio or direct-current component, in which the alternating signal is modified so that its mark-to-space ratio or direct-current component can be detected by simple comparison with reference signals. Various information is then transmitted over a line, and the operation of the stage that generates the alternating signal can also be monitored.

Abstract: An arrangement for reducing interference in tuned circuits in integrated circuits as a result of the reception and transmission of high frequencies. An external tuned circuit is integrated in the integrated circuit and the interference which is otherwise produced by the connecting pins is eliminated.

Abstract: Power amplifier circuit for an inductive load including a supply voltage applied to the inductive load via a series circuit comprising a first transistor electronically coupled to a second transistor for conducting current from the supply voltage through the first and second transistors to the inductive load, wherein a reference potential smaller than the supply voltage is coupled at a center point of the series circuit.

Abstract: Control circuit for producing output voltages from a plurality of sensor signals, wherein each of the sensor signals are identical and mutually phase shifted. The control circuit comprises a plurality of comparators for producing the output voltages, wherein each comparator is respectively supplied with one of the sensor signals and with an amount of hysteresis which depends on the amplitude of one or more of the respective other sensor signals. The control circuit further comprises electronic circuitry for deriving the respective amount of comparator hysteresis for each of the comparators from the amplitude of one or more of the respective other sensor signals.

Abstract: A high-voltage transformer for a television receiver is known to be tuned to a specific harmonic of the frequency of the flyback oscillation in order to reduce the internal resistance of the high-voltage source. In certain cases such as, for example, a channel change, a particularly high beam current of the order of magnitude of 3 to 5 mA briefly occurs. As a result of such a current surge, overshoots are produced at the transformer which may increase the flyback voltage at the switching transistor by approximately 150 V and thus endanger the transistor. The object is to design the transformer in such a way that overshoots of this type are reduced. According to the invention, the number of partial windings (W2-W5) is greater than the number of diodes (3-5), and separate partial windings (W2-W5) are tuned to different harmonics. This tuning causes the quality factor to be reduced and the attenuation and the bandwidth to be increased in the system.

Abstract: A process and arrangement for tracking and eliminating disturbances which occur in particular while scanning optical information carriers. The invention avoids the inconvenience of disturbance elimination using time-delayed auxiliary beam signals by influencing the auxiliary beams of a scanner working according to a three-beam principle in such a way that they hit the information carrier to be scanned as two auxiliary beams which lie next to each other on the track radius, so that disturbances due to subtraction between the auxiliary light spot signals formed by the auxiliary light spots are eliminated. A birefringent crystal is preferably used in order to direct the auxiliary beams in this manner. The invention is preferably suitable for optical information carrier scanning devices.

Abstract: When digital data are being transmitted, parts of these data can be irreversibly destroyed by channel interference. Gaps produced in this way in the bit stream must be indicated and the respective decoder must be resynchronized. When encoding in accordance with the MPEG2 standard is used, the timing of this resynchronization is heavily dependent on the contents of the bit stream elements which have been lost. Thus, in the event of failure of the picture start codes or extension start codes of the frame layer which are important for the decoding, although the decoder will resynchronize to the slice-start code of the following slice layer, important information such as the time reference of the frame, for example, the frame type (I-, P-, B-frame) or else important parameters relating to the decoding of movement vectors may be false in this case, however.

Abstract: A method and apparatus for the transmission of digital signals comprises the steps of forming at least two data channels carrying data packets, and eventually header data. The channels have different levels of error protection and include picture data, wherein the data packets within one of the channels have the same level of error protection, and wherein a super-ordinate channel has a higher error protection than a subordinate channel. Important information of a subordinate channel is then transmitted in a super-ordinate channel. The important information allows following erroneous reception of the digital signals an improved recovery of picture data decoding.

Abstract: Machine for recording and playing back information with a tape-storage medium comprising a tape-counting device for determining locations on the storage medium representing a beginning, an end or a section of a recorded information and labeling the locations as data. The labeled locations are stored in memory and marked. Selective winding to a chosen recording section which is associated with one of the marks occurs by means of the tape-counting device and the stored labeled data, together with another one of the marks which is detected and used as a reference, wherein, due to the detection of this reference mark, the tape-counting device is set to the data which was determined with the setting of the reference mark, and wherein the mark associated with the chosen recording section is dependent on the data of this reference mark. A tolerance window arranged symmetrically with respect to the reference mark is included to assist in the detection of the reference mark.

Abstract: For interference-free transmission of high-frequency signals, the receiver must be terminated with the characteristic impedance of the transmission line. This can be achieved by a single base-connection circuit, but in this case the input impedance is dependent on the current flow and is therefore not exactly constant. Adding a second base-connection circuit makes the circuit symmetrical, so that opposite effects are canceled, which makes the input impedance constant. Production in both bipolar technology and in MOS technology is possible.

Abstract: The invention concerns a high storage capacity ROM-RAM disk and a process for reading and writing to the ROM-RAM disk. T he aim of the invention is to devise a ROM-RAM disk and a process making it possible to read ROM and RAM simultaneously, to read the ROM area and at the same time write to the RAM area and to provide the largest possible volume of memory. The invention comprises two alternative designs. In a first design a ROM-RAM disk contains an area having both ROM and RAM memory structures as of a certain radius or diameter, establishing therein, at a constant rotational speed, a scanning/writing speed which ensures a reading/separation of the data stored in the ROM-RAM structures. In a second design, the available storage area is taken up entirely by a ROM-RAM storage area, where RAM memory structures have a reduced data rate in order to form, a length of memory structures necessary for separating the data stored in the ROM-RAM storage area.

Abstract: The invention relates to the classification of such parts of television signals which are commercials so that those parts can be eliminated during recording or playback. Known methods for the detection of commercials during a TV program suffer from the drawbacks that one or two features of the TV signals are observed to decide whether the TV signal is part of a commercial or not. In the present invention of a method and apparatus, a classification of TV signals results on a plurality of information gathered from the TV signals and a plurality of rules using a rule system. Such a rule system permits the modeling of uncertainties so that for the definition of the rules, no strict values or strict limits need be given. In particular, fuzzy rules and linguistic variables are used.