Abstract: Synchronization of a powerline modem network (10) with a plurality of devices is provided. A plurality of devices (16 and 18) each include a powerline modem (20) and a clock circuit (22) for synchronizing a data rate. The powerline modem permits data transmission between the plurality of devices over a powerline network on data carriers (28). A synchronization signal is transmitted over the powerline network. The synchronization signal includes a carrier (30) operating at a frequency different from the data carriers. The synchronization signal provides each of the plurality of devices a time reference to synchronize the data rate.

Abstract: An improved video production architecture adds an additional transition element for controlling external devices in synchronism with a given transition so that the transition is treated like a simple mix or wipe. The additional transition element is a “Trigger” function that has a value indicating when during the given transition the external device is activated. The trigger function, device controlled and trigger value are set up during preconfiguration of an effect in an effects memory. When the effect is recalled, if the Trigger function is activated on a switcher control panel, then the external device is activated at the time during the given transition specified by the trigger value.

Abstract: A method of optimizing the display of an up-converted interlaced video frame signal from a received progressive video frame signal (11) comprises the steps of receiving a progressive video frame signal, decoding (12) the progressive video frame signal using an interpolation function (18) to provide an interpolated interlaced video signal, deinterlacing (14) the interpolated interlaced video signal, and de-interpolating (16) the deinterlaced interpolated interlaced video signal to provide an optimized progressive video frame signal (17).

Abstract: An arrangement for producing television contributions in a studio or in a mobile unit, including at least one picture signal source (19 to 22), devices (11 to 17) for processing the picture signals, and outputs (23 to 26) for the processed picture signals. To simplify elaborate constructions, wiring and reconstruction, the arrangement accomodates the individual picture signal-processing devices (11 to 17) as independent units in a central operation unit (10) and connects the inputs and outputs of the picture signal-processing devices (11 to 17) to a controllable switching device (18) enabling free allocation of the picture signal-processing devices (11 to 17).

Abstract: A demultiplexer applies picture information to pixels arranged in an array of a display device having columns and rows. The demultiplexer includes transistor switches each having a control terminal, an input terminal and an output terminal. A first bus couples switch control signals to the control terminals of the switches. The conductors of a first bus extend in a region containing each of the switches to form a global bus arrangement. Local buses have each conductors coupled to the input terminals of the switches associated with the individual local bus. The output terminals of the switches associated with the individual local bus are coupled to corresponding, consecutively disposed column conductors of the array. The individual local bus has a section that crosses over the first bus and a second section extending between the crossover section and the input terminals of the associated switches.

Abstract: According to this method, before a high-frequency pulse train is applied between the two electrodes of a pair carried by one plate, at least one sustain pulse is applied between an electrode of this pair and an electrode of another plate of the panel. As the sustain discharges are not generated between the same electrodes as the stabilized discharges, the electrodes may be moved further apart so as to lower the stabilization frequency without thereby having to increase the sustain voltages.

Abstract: A composition and method of forming an internal neutral density filter on a luminescent screen assembly of a cathode ray tube (CRT) is disclosed. The luminescent screen assembly is formed on an interior surface of a glass faceplate panel of the CRT tube. The luminescent screen assembly includes a patterned light-absorbing matrix that defines three sets of fields corresponding to one of a blue region, a green region and a red region. An internal neutral density filter is formed on the light-absorbing matrix. An array of blue, green and red color phosphors is formed on the internal neutral density filter corresponding to one of the blue region, the green region and the red region defined in the light-absorbing matrix. The internal neutral density filter has a composition including a red pigment, a blue pigment and at least one non-pigmented oxide particle.

Abstract: The method of assembling an electron gun for a cathode-ray tube comprises the steps loading of at least two electrodes (20, 70) one above the other, adjusting the distance between the electrodes along the longitudinal axis of the gun, and loading the electrodes between the two jaws (30, 30′, 31, 31′, 60, 60′, 61, 61′) of a positioning tool (35). The further includes positioning of the electrodes in the plane perpendicular to the longitudinal axis by clamping the jaws of the tool in a single direction, until a pressure is exerted on four corners (23) of each electrode and retaining by hot insertion of glass beads (40) into claws arranged on the periphery of the electrode openings of the positioning tool. The tool holds the electrodes in planes perpendicular to the longitudinal axis of the gun.

Abstract: A process comprises a step (2) of creating histograms of an image representing the occurrences of the luminance values as a function of these values. A further step compares (5) a histogram of an image T(t) with a histogram of a previous image T(t−1), and is characterized in that the step of comparing (5) consists of calculating, for an occurrence histo13 lum (n,t) corresponding to a luminance value n in the image T(t), the absolute differences between this occurrence and the occurrences histo_lum (n+k, t−1) of the previous image, where K is a natural integer and varies from −K to +K. The process is further characterized by choosing the minimum value Min_Diff (n, t) from among these differences, and is characterized further by in summing (6) the minimum values for the set of luminance values of the histogram, and comparing (7) the sum obtained with a threshold.

Abstract: A device for reading or writing on optical recording media with disk type recognition capability has an optical scanning device and a focus regulating circuit. The object of the invention is to provide a device of this type which can reliably recognize in a short time the type of the recording medium inserted into the device. Another object of the invention is to provide a corresponding process. These objects are attained in that the disk type recognition capability includes a mirror signal generator, a threshold value generator, a counter and an evaluation unit. The process is based on the utilization of a mirror-signal value of the device for disk type recognition.

Abstract: The invention proposes a method for reverse playback of a digital data stream representing video information. The information is stored in an Intra picture coded format followed by several Non-Intra coded pictures. For reverse playback n sectors are jumped back from the actual scanning position. The location of the n sectors is read in forward direction. A sector location list is created. The sector location list is resorted to a reverse order. The position of sector stream is parsed according to the sector location list in order to find appropriate position of start codes of the video information. Digital data stream from position of start codes is delivered to a following processing unit.

Abstract: A display apparatus comprising an evacuated envelope having an interior surface and an exterior surface is disclosed. The envelope includes a faceplate having a luminescent screen on the interior surface thereof. An electron gun is disposed within a neck of the envelope for generating at least one electron beam that is directed toward the luminescent screen. A funnel connects the neck of the envelope with the faceplate. A deflection yoke is disposed around the envelope at the junction of the neck and the funnel. The yoke is attached to the envelope with an adhesive. A resistive primer coating is disposed on the envelope and forms a barrier between the yoke adhesive and the envelope. The resistive primer coating is formed from an aqueous formulation comprising a copolymer of chloroprene and methacrylic acid, a conductive filler material and at least one cross-linking agent.

Abstract: An apparatus and method for providing variable-length correlation for spread-spectrum communications includes a derotator, a variable-length correlator in signal communication with the derotator, a phase detector in signal communication with the variable-length correlator, a lock detector in signal communication with the phase detector, and a controller in signal communication with the lock detector for controlling the length of the variable-length correlator; where the corresponding method to track out large frequency offsets in spread-spectrum communications includes receiving signal chips, correlating the received signal chips, computing a loop error in accordance with the correlation, setting a new lock status in accordance with the computed loop error and a previous lock status, and setting a new correlator length in accordance with the new lock status and a previous correlator length.

Abstract: The invention concerns a method (200) and system (100) for searching for duplicate data. The method (200) includes the steps of: generating (212) at least one identifier from at least one portion of a first segment of data using a unique identifier function; generating (216) at least one identifier from at least one portion of a second segment of data using the unique identifier function; and comparing (220) at least one identifier associated with the first segment of data with at least one identifier associated with the second segment of data to determine whether the first segment of data is substantially identical to the second segment of data.

Abstract: A wireless telephone system comprises a base unit having a base transceiver, and one or more wireless handsets, each handset comprising a handset transceiver. Each handset establishing a time-division multiple access (TDMA) link over a shared RF channel with the base unit via the base transceiver in accordance with a TDMA epoch, which allocates exclusive data and audio packet time slots to each handset. Each handset powers on its transceiver during its respective data and audio packet time slots as necessary to synchronize with the base unit using synchronization data transmitted with a data packet, to detect incoming call data transmitted with a data packet, or to transmit and receive audio information over the TDMA link. The handset powers off its transceiver otherwise during the epoch to minimize handset power use.

Abstract: A display system (10) comprises a digital micromirror device (DMD) (24) controlled by a driver circuit (30) responsive to sequences of pulse width segments formed by a processor (31). The processor (31) increases the pixel brightness by actuating selected pulses such that within a first range of brightness levels between first and second pixel brightness boundaries, a first large-duration pulse element becomes actuated to reach the second pixel brightness boundary, and within a second range of pixel brightness levels between second and third pixel brightness boundaries, the first large duration pulse element remains actuated. Upon reaching the third pixel brightness boundary, a second large duration pulse element now becomes actuated with the first large duration pulse element remaining actuated. Forming the pulse width segments in this manner serves to reduce motion contouring.

Abstract: A method for copying a recorded series of bits from a first location to a second location on a rewritable disc media. The method includes the steps of selectively marking a beginning point and an end point of a segment of the recorded series of bits, and a location to which said segment is to be copied prior tp said reading step. Subsequently, video data comprising at least a portion of the segment of the recorded series of bits to be copied is read from the disk and stored in a track buffer of a DVD device. At least part of the video data from the track buffer is subsequently transferred directly from the track buffer to the record buffer by a control processor of the DVD device. Finally, the portion of the video data stored in the track buffer is written to the second location.

Abstract: The invention proposes a camera 1 furnished with a flat screen viewfinder 4 which comprises a specific fixing system. The fixing system essentially comprises a boom 5 for connecting the viewfinder 4 and the camera body 2. The boom 5 is connected on the one hand to the camera body 2 and on the other hand to the viewfinder 4 by fixing means 6 and 7 allowing fine-tuning and positional retention. According to one embodiment, the boom 5 extends towards the rear of the camera 1 so that a possible position of the viewfinder 4 lies in the extension of the lens 3.

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. The correction waveforms may have vertical and/or horizontal rates.

Abstract: In computer monitors having a picture tube, it may be seen that a small white picture area is displayed with the same white value as a large white picture area. If it were intended to achieve the same result for a television receiver with a picture tube, a voltage supply is necessary in which the power is permitted to fluctuate between 60 and 300 watts given a stable output voltage. On account of the lower luminous efficiency, this effect would have considerably intensified repercussions on the power consumption of plasma screens. The invention is based on the object of providing a simplified method for regulating the picture power in a television receiver. The method according to the invention is distinguished by the following steps. The power consumption of the picture power is obtained by the video voltage R, G, B. The video voltage is converted into an information item which is then a measure of the picture power. This information item is subsequently fed to two regulating loops.