Abstract: A track and hold amplifier for use in analog/digital-converters comprises, in succession, an input buffer, a pn-junction switch and hold a capacitor. A feedback is provided between the hold capacitor and the input buffer and a second pn-junction switch is provided to disable the feedback during the hold mode.

Abstract: In an apparatus (1) having a housing (2) and having an electroacoustic transducer (14) accommodated in the inner housing space (9) and having at least one passage (28, 29) which traverses a housing wall (6, 7) and which, together with the inner housing space (9) and the rear volume (25) of the transducer (14), which rear volume (25) is open to the inner housing space (9), forms an absorption-circuit resonator which causes a dip (31) in the sound pressure versus frequency response(27), a compensator (32) for the compensation of the dip (31) in the sound pressure versus frequency response (27) is provided and includes the housing (2) being provided with a plurality of ducts (33, 34, 35, 36; 41) traversing the housing (2), each duct forming an acoustic friction.

Abstract: A DC to DC converter converts a DC input voltage into a plurality of DC output voltages and includes a circuit stage having switching elements for converting a DC input voltage into a first AC signal (VAC1). A first resonant circuit converts a first AC signal into a second AC signal which is used for forming a first DC output voltage. A second resonant circuit converts the first AC signal into a third AC signal which is used for forming a second DC output voltage. A control circuit sets various frequency ranges for the first AC signal to set various supply power modes, such as for normal operation and standby mode.

Abstract: The power consumption of a frequency-divider can effectively be reduced when the frequency of the input signal varies by more than the division factor of a divider cell in the frequency divider. A low frequency input signal requires a lower division factor, and a divider cell in the frequency divider can be bypassed and switched off to obtain this lower division factor, thereby reducing the power consumption.

Abstract: A switched mode power supply includes an input for receiving an input signal voltage, a flyback converter circuit arrangement and an output for delivering a regulated output signal voltage. The switched mode power supply further includes a boost converter arranged to be operatively combined with the flyback converter, and functioning such that the combined converter operates in a boost mode when the input voltage is above a threshold value, and in a flyback mode when the input voltage is below the threshold value.

Abstract: In a waveform generator, a repetitive non-linear waveform is generated by varying the number supplied to a pulse reduction circuit during the repetition period. Consequently, the pulse reduction circuit supplies a number of desired output pulses, which number varies in time corresponding to the varying number. For example, when a lower number is inputted to the pulse reduction circuit during a sub-period of the repetition period, a corresponding lower number of output pulses will be generated. Consequently, a lower number of increment values will be summed or integrated during this sub-period and the waveform changes less steeply.

Abstract: During recording of an MPEG information signal on a record carrier, transport packets (Pk) are stored in signal blocks in a track on the record carrier. x transport packets of the MPEG information signal are stored in the second block sections (SB) of y signal blocks, where x and y are integers, x≧1 and y>1, more specifically, y>x. Further, third block sections (TB) are present in one or more of the second block sections in the y signal blocks of a group for storing additional information, this additional information relating to the specific application of recording and reproducing the MPEG information signal on/from the record carrier.

Abstract: Recording/reproducing apparatus for recording/reproducing serial information stream of A/V signals comprising packets of information signals, such as MPEG Transport Packets, on/from a recording medium. The apparatus includes a time stamping unit for time stamping received information packets in accordance with a time stamping clock reference, a writing unit for recording the information packets in accordance with a write clock reference, and a reading unit for reproducing the information packets in accordance with a read clock reference. All clock references are derived from a single crystal clock reference. The read clock reference has a frequency equal to the frequency of the single crystal clock reference, this frequency being an integer multiple of the frequency of the write clock reference. The time stamp clock reference has a frequency derived from the single crystal clock reference by a digital counter.

Abstract: An imaging modality, in particular a mobile CT system, comprises an imaging system for imaging an object to be examined. The imaging modality is also provided with an image guided surgery system which includes a position measuring system for measuring positions within the object and a data processor for deriving a transformation between positions within the object and the corresponding positions in the image. The position measuring device is also arranged to measure the position of the imaging system and the data processor is arranged to derive the transformation from the position and/or orientation of the imaging system. The position measuring system is notably an optical position measuring system which is arranged to measure the position of the gantry of the CT system. The data processor is arranged to derive the transformation from the measured position of the gantry.

Abstract: In a memory arrangement including a frame buffer unit (FB) having memory equipment (SDRAM) clocked by a memory clock (fm), and a scaler unit (S), the scaler unit (S) has at least one line memory (inplinmem, outplinmem) for converting a continuous input data stream into a frame buffer data stream in which samples of two successive data bursts of N samples are situated N+&Dgr;N samples apart from each other, and/or for converting such a frame buffer data stream into a continuous output data stream, to allow the frame buffer unit (FB) to operate with less than three different clocks.

Abstract: A cathode ray tube device in which two deflection yokes and two electron guns are used, but in which only one shadow mask is used. Image uniformity is obtained by creating a partial overlap of the two images created by the two yokes.

Abstract: A video processing device and method for generating a descriptor data structure representative of a feature that has been selected from among of plurality of features including visual, conceptual, textual and graphical of a visual animated data file includes a user input unit for selecting a desired feature and generating an associated descriptor data containing attribute values, and a processor identifies the selected feature inserts selected attribute values into a standard descriptor template. Various types of features, from concepts about a video sequence, to age identification, to images in a video clip, to particular objects or colors can all be classified in a standard descriptor template, to provide uniformity in storing and retrieving the various features currently lacking in freeform or single feature descriptors.

Abstract: An apparatus and method for forming electrical connections in an acoustic transducer wherein a non-conductive bonding material is interposed between a conductive surface on the transducer and a conductive lead. In one embodiment, the conductive surface is comprised of gold, and the conductive lead is comprised of copper that is plated with at least one metallic layer. The metallic layer may be further comprised of an intermediate metal layer that is overlaid by a layer of gold. The intermediate layer may be further comprised of titanium, or an alloy of nickel and chromium. A non-conductive bonding material is deposited on either the lead or the conductive surface, which are joined to form a bonding interface. Electrical conduction is attained through a plurality of contact points that arise from the surface roughness inherent in the materials that project through the bonding interface. Alternatively, the contact points are impressed in the surfaces.

Abstract: A copy protection system for protecting content wherein a ticket and a watermark are created, utilizing a first time reference (TD) and a one-way function, to indicate the copy protection status of the content. A source device produces the ticket and watermark using a first time reference and a hashing function. The source device provides a data stream containing the content, the ticket, the watermark, and the first time reference (TD) to the receiver device. The receiver device determines if the first time reference (TD) is contained within a time window determined by a second time reference. When, the first time reference (TD) is contained within the time window, the receiver compares the ticket to the watermark using the first time reference (TD) and the one-way function, and based on the comparison, produces a signal indicating the copy protection status of the content.

Abstract: A cathode ray tube having a tensioned shadow mask with elongated holes, i.e. holes with a length longer than 5 mm. The pattern of holes repeats itself after 5 or more rows and the relation between the number of rows after which the pattern repeats itself, the vertical pitch av and the horizontal pitch dh is given by av/dh≦n2≦8av/dh, most preferably n2≈2av/dh.

Abstract: An EL device according to the invention comprises a seal of an organic sealing material which substantially does not extend inside the inner perimeter 8 of the sealing surface. To be able to provide the sealing material between the sealing surfaces by capillary action, the seal has a thickness of less than 100 micrometers. Preferably, the seal has a thickness of less than 10 micrometers and a width of more than 0.2 mm, so that the diffusion of volatile materials through the seal is greatly reduced.

Abstract: The invention relates to a projection display device comprising an illumination system having a light source and an optical guiding means for providing an illumination beam, an image display system comprising a display panel for modulating the illumination beam with image information and projecting the image on a screen, and color filter means provided on a wheel, rotatable mounted at its hub, for transmitting colored portions of the illumination beam for illuminating the display panel. In order to improve the efficiency of the projection display device, the color filter means comprises adjacent spiral-shaped filter portions for simultaneously illuminating portions of the display panel by the colored portions of the illumination beam so that the portions of the display panel are consecutively illuminated by the colored portions of the illumination beam.

Abstract: In a communication device (1) with firstly a coil configuration (2) which has two oppositely situated sub-configurations (3, 4), by means of which a communication field operative between the two sub-configurations (3, 4) can be generated and each of the two sub-configurations (3, 4) having at least two coils (5, 6, 7, 8), and with secondly sub-configuration signal-generating means (31) which are designed for the distinguishable generation and delivery of a first sub-configuration signal (TI1) and a second sub-configuration signal (TI2), for each of the two sub-configurations (3, 4), there are provided thirdly coil signal-generating means (32) which are designed for the distinguishable generation and delivery of coil signals (S1, S2, S3, S4) for the at least two coils (5, 6, 7, 8) of the respective sub-configuration (3, 4) on the basis of the respective sub-configuration signal (TI1, TI2).

Abstract: The invention relates to a projection display device comprising an illumination system having a light source and an optical guiding means for providing an illumination beam, an image display system comprising a display panel for modulating the illumination beam with image information and projecting the image on a screen, and color filter means provided on a wheel, rotatably mounted at its hub, for transmitting colored portions of the illumination beam for illuminating the display panel. In order to simplify the manufacture of the projection display device, the color filter wheel is provided with one or more cholesteric layers for reflecting a portion of the illumination beam not having a predetermined color and having a circular polarization corresponding to a first direction.

Abstract: Provided is an apparatus and method for notifying the completion of a commercial in a channel selected by a viewer. The system includes a segment detector coupled to receive incoming channel signals from a plurality of sources and for determining the beginning and end of commercials within a particular channel; at least one tuner for receiving the incoming channel signals and for decoding them for display in a television unit; and, a controller for notifying the completion of commercials from the channel designated by the viewer. Accordingly, when commercials are ended in one channel while viewing another channel, the viewer is notified of such completion and has an option to switch back to the desired channel.