Abstract: According to the invention a method is proposed for fast accessing of a digital data stream representing video or audio information, in which parts of the stream information can be marked as temporarily erased. The invention includes a first table with address information of Stream Objects stored on a medium and information about temporarily erased Stream Objects. A second table contains address information of user defined Stream Objects, wherein said second table contains program related information and cells. The program related information includes a cell number of the first cell, which follows the last cell assigned to this program and wherein said cell includes the original cell number of the appropriate cell of said first table.

Abstract: An apparatus for convergence correction in a TV receiver with a CRT display comprises a display screen with photo sensors positioned adjacent to screen edges. A cathode ray tube generates a raster for illuminating the display screen and the photo sensors. A signal generator generates a video signal having a first part for convergence alignment and a second part having sufficient video signal amplitude to cause an average level of beam current loading corresponding to an average level that can occur during broadcast video reception. The video signal being coupled to the cathode ray tube for illuminating the display screen and sensors. The video signal facilitating convergence alignment with the average level of beam current loading to ensure that convergence alignment is maintained during broadcast video reception.

Abstract: An apparatus displays pictures from sources having a plurality of horizontal frequencies. A scanning generator is operable at the plurality of frequencies and comprises an oscillator generating a signal. A divider with two selectable counts is coupled to the oscillator and divides the signal by a first count to generate a horizontal drive signal. A horizontal scanning amplifier generates a scanning signal responsive to the horizontal drive signal coupled thereto. A controller is coupled to the scanning amplifier and to the divider. In response to selecting another of the plurality of frequencies, the controller monitors the scanning signal and responsive to its presence inhibits selection of a second of the selectable counts. In the absence of the scanning signal the controller enables selection of the second of selectable counts and the divider generates a horizontal drive signal representative of the another one of the plurality of horizontal scanning frequencies.

Abstract: A projection display apparatus comprises a display device forming an image for projection to illuminate a display screen. A current source generates a current. A current sink is adjacent to the display screen and is coupled to the current source for receiving the current. A detector is coupled to the current source and the current sink for receiving the current and detecting a presence of the received current. Wherein a first condition, absent illumination by the projected image on the current sink, the current from the source divides and is coupled to the detector in accordance with a first ratio, the detector assuming a first state indicative of the absence of illumination, and in a second condition in accordance with an intensity of illumination by the projected image on the current sink, the current from the current source is received by the current sink in accordance with a second ratio and the detector, absent the received current, assumes a second state indicative of illumination on the current sink.

Abstract: A video signal-processing device, for example a film scanner, including an arrangement for detecting scratches in images of a video signal. To improve the detection of slant scratches, the arrangement for detecting scratches combines a given number (m) of series-arranged pixels (43, 44) of a video image to form a group (45), and to determine a division of the pixels in accordance with given criteria for each group of pixels and, based on this division, to classify the pixel groups in scratch sections and non-scratch sections.

Abstract: An apparatus for reproducing a digitally encoded signal from a medium, comprises a transducer for transducing the digitally encoded signal and generating a bit stream therefrom. A processor is coupled to receive the bit stream for controllably processing the bit stream. A memory is coupled to the processor for storing the processed bit stream information. A controller is coupled to control the memory and the processor for controlling identification of information within the bit stream, wherein the controller controls the processor to identify a specific sector type in the bit stream and responsive to the specific sector identification the controller controls the memory for storing the identified specific sector.

Abstract: In one embodiment, data are converted, with the aid of corresponding rules and headers, into data having a fixed block length in such a way that, with the CTL bit definition, no clashes with known data structures of the CTL track such as VISS and VASS occur. The effect achieved by this is that any desired data can be stored on the control track.

Abstract: A scanner utilizing an illuminating device, monochromatic light sources, and scanning elements to improve the color separation and reduce color crosstalk for generating chrominance component signals. The illumination device illuminates or transilluminates an image by means of the monochromatic light sources. The scanning elements converts the light obtained from the illuminated or transilluminated image into a chrominance component signal. The illumination device is implemented in such a way that the monochromatic light sources illuminate the film frame at positions which are separated from each other. Sensors are arranged in such a way that they are illuminated by the relevant associated light source.

Abstract: A circuit for correction of deflection errors in a television set, in which a correction current having alternate forward-sweep and flyback periods is supplied to a correction coil for an error parameter. An amplitude of the correction current is reduced during a time window which corresponds to the flyback period and in which no visible picture is displayed.

Abstract: In a video signal distribution device (1) having operating elements (14, 15) and a control device (13) for evaluating the operating state of the operating elements (14, 15) and for forming a video output signal from a multitude of video source signals (7, 19) in dependence upon the operating state, the video output signal being made available at an output (12) of the device, there is provided, for second and third utilizers, that the video signal distribution device (1) includes a storage device (13) for storing an assignment prescription for assigning at least a second operating state to each evaluated operating state, and that the control device (13) generates at least a second video output signal in conformity with the second operating state predetermined by the storage device, and makes this second video output signal available at at least a second output (24).

Abstract: The absence of MPEG processing in a consumer digital recorder player may preclude on-screen message display of recorder status. Various methods are disclosed which facilitate the on-screen display of recorder player status messages. A first embodiment returns a reproduced decoded, analog video signal (102) to the digital recorder player (200) for insertion of status messages. In a further embodiment recorder messages data (221) is coupled to the digital signal decoder (100, 117, 520) for inclusion with the decoded analog video signal (102). In a another embodiment a recorder message command (TAG/CMD) is coupled to the decoder (100, 510) to access recorder specific graphical messages. In yet a further embodiment, recorder message data (221) is tagged and coupled to the decoder (100, 510) to select recorder messaged data. In yet another embodiment, digital or analog operating mode determines recorder (200) message display timing with respect to a reproduced decoded video signal.

Abstract: A method for generating display correction waveforms for a CRT display comprises the steps of selecting one of a plurality of trace portions for forming part of a correction waveform, the trace portions having different average values. Completing each of the correction waveform by combining each selected trace portion with a respective retrace portion such that all completed correction waveforms have a predetermined average value.

Abstract: Generation of unintentional emissions are controlled by analysis of display signal content processed for scanning beam velocity modulation. An apparatus for scanning beam velocity modulation comprises a scanning velocity modulation signal processor for generating an scanning velocity modulation deflection signal responsive to a scanning velocity modulation signal. A generator supplies a feed forward signal to the processor for controlling the scanning velocity modulation deflection signal amplitude in response to a component of the scanning velocity modulation signal.

Abstract: Unintentional emissions are controlled responsive to the spectral content of the display signal. A video display apparatus comprises a cathode ray tube for video image display. A processor controls a magnitude of a video image display signal coupled to the cathode ray tube for display in response to an emission control signal. A generating means is coupled to the processor for generating the emission control signal responsive to a component of the video image display signal.

Abstract: In an digital disk player the timely acquisition of requested replay sectors is particularly important during trick mode operation. Delay in a transduced bitstream path is substantially obviated from the process of controlling a transducer position during replay by a method comprising the steps of receiving a first and a second transducer address for controlling the transducer position responsive to a replayed address. Comparing the replayed address with the first transducer address to detect equality therebetween. In response to the detected equality moving the transducer to a new position determined by the second transducer address.

Abstract: The coder makes it possible to convert a succession of video and/or audio blocks, consisting of binary combinations of N bits, into a succession of binary data blocks consisting of combinations of N bits, each binary data block corresponding to one video and/or audio block. The coder codes each end binary combination 0 or 2N−1 of each video and/or audio block in the form of a coded binary combination consisting of a nature information item In and a position information item Ip. The nature information item In gives the nature, 0 or 2N−1, of the end binary combination, and the position information item Ip gives the position which the end combination occupies in the video block.

Abstract: A vertical deflection amplifier drives a vertical deflection coil according to a ramp input signal and has a current sensing resistor providing a feedback signal. The vertical deflection coil is subject to crosstalk or excitation by a horizontal deflection coil. A compensation network is coupled between a source of the horizontal deflection signal and the current sense resistor, and has a network that produces a corrective current in the current sense resistor to substantially cancel horizontal rate crosstalk component from the feedback signal.

Abstract: A projection display comprises a display device forming an image for projection onto a display screen. A photo sensor is adjacent to the display screen and generates a first signal responsive to a level of the projected image illumination incident on the photo sensor. A detector is coupled to receive the first signal and generates an output signal indicative of detecting the first signal. A source of a predetermined detection threshold value is coupled to the detector for determining a threshold at which the detection of the first signal occurs. Wherein the first signal exceeds the predetermined detection threshold value, the detector detects and generates the output signal indicative of signal detection, and generates a second signal for coupling to the source to change the predetermined detection threshold value.

Abstract: A circuit for regulating an anode voltage in an information display apparatus. A horizontal deflection circuit has trace and retrace modes of operation. The horizontal deflection circuit further has a fixed retrace capacitance; and a series combination of a switched retrace capacitance and a switch element, which combination is coupled in parallel with the fixed retrace capacitance. The switch element is in a closed position as the horizontal deflection circuit enters the retrace mode of operation. A voltage divider network samples the anode voltage. A control circuit is responsive to the sample voltage for controlling the switch element, such that the control circuit effects regulation of the anode voltage by selecting a time during the retrace period at which to place the switch element in an open position. The control circuit may also provide a raster width compensation voltage for an east-west pincushion correction circuit.

Abstract: A method for convergence correction in a television receiver and to a television receiver, in particular a projection television receiver having in each case one monochromatic picture tube for the three primary colours, red, green and blue, improves the quality of convergence correction. Each picture tube is assigned a correction device which comprises a convergence circuit. The convergence circuit is assigned a memory in which correction values for the convergence correction of the three picture tubes are stored. In accordance with the correction values, the convergence circuit generates output signals, which are output to a correction device, which in each case comprise at least one correction coil and, for each correction coil, one driver circuit. A correction current is applied to the associated correction coil in order to correct image defects of a picture tube.