Abstract: A wireless communication device automatically and seamlessly switches to an alternate, available system when it is unable to complete a call origination attempt, without requiring the user to take any affirmative actions to select the alternate system. The wireless communication device stores a list of preferred communication systems. The mobile station attempts to acquire one of these preferred communication systems upon failure of the reverse link. If that is not successful, the mobile station attempts to acquire a communication system most likely to provide service. If that is also not successful, the mobile station re-attempts acquisition of the current communication system. The mobile station also re-attempts acquisition with one of the preferred communication systems after a predetermined idle time.

Abstract: An improved balanced mixer is provided for use in radio communication devices. The improved balanced mixer comprises a known Gilbert type mixer, a transconductance amplifier, a signal splitter, and a dual feedback structure from the pre-amplifier output to the input ports, thereby providing better linearity, that is, better input third order intercept point (IIP3), and improved impedance matching, without increasing the circuit noise figure.

Abstract: A digital broadcasting system capable of causing any of physical channels selected by a broadcaster to be received as one of the channels available to users which is different from the physical channel selected by the broadcaster. For each of programs of each of the channels available to said users, a program information record comprising PSI (program specific information) is stored in a data base. The broadcaster is permitted to include, in the PSI, channel mapping information whose mapping destination is a channel (or a program) to be received instead of the channel for which said program information is intended. The program information records is inserted in broadcast transport streams on schedule and, if necessary, immediately after the broadcaster have included the channel mapping information in the PSI data.

Abstract: A system and method for predistorting a signal which is to be amplified by a non-linear amplifier. The system and method uses additional predistortion circuits to eliminate the predistortion caused by amplifier input circuits and amplifier output circuits. In one aspect of the invention, the system and method uses a frequency response and phase corrector circuit to modify the amplitude versus frequency of the signal independent of phase.

Abstract: Apparatus for automatic electronic replacement of a billboard in a video image including an automatic camera orientation measurement apparatus including motion measurement means operative to measure the Field of View (FOV) of the TV camera relative to a known reference position.

Abstract: A display system and a method for supplying a display system with a picture signal are described, in which the picture signal is fed in dependence on a system clock pulse of the display system, whereby an improvement in the picture quality is achieved. A particularly good picture quality is achieved if a change of the picture signal for one picture pixel to the picture signal for the following picture pixel is chosen to be temporally shifted relative to the sampling instant at which the display system samples the picture signal.

Abstract: An embodiment of the present invention provides a signal generator for generating a signal with a predetermined frequency. The signal generator includes a first comparator for generating a first error signal and a second comparator for generating a second error signal. The first and second comparators are coupled to an oscillator configured to receive the first and second error signals and generate the signal having a predetermined frequency. Another embodiment of the present invention provides a signal generator for generating a signal with a predetermined frequency. The signal generator includes a counter for generating a first count, Q_last. The counter is coupled to a ratio counter which generates a signal having a value less than or equal to Q_last. The contents of the ratio counter represent the phase of the signal having a predetermined frequency. The ratio counter outputs the signal having a predetermined frequency.

Abstract: A multi channel video engine (10) for accepting, dividing, modifying and recombining light to project an image. A housing (12) encloses an optical assembly (28) having a dichroic mirror assembly (58) and a color cube (60). A plurality of LCD assemblies (30) accept light from the dichroic mirror assembly (58), modifies it, and reflects it to the color cube (60). A lens assembly (16) is affixed to a bulkhead (24) of the housing (12) using a lens cradle (14) and lens retainer (18). An output prism (54) aligns light onto a second plane (70) to coincide with an optical axis (72) of the lens assembly (16).

Abstract: Prior art methods of decoding a vertical blanking interval (VBI) scan line decoded each scan line within a given VBI using the same operational parameters, such as filter coefficients and run-in clock recovery parameters. The problem with these prior art methods is that each scan line was treated the same, even though certain scan lines within a given VBI typically exhibit different signal and content characteristics. The present invention provides for line-specific decoding of VBI scan lines. As such, each scan line within a given VBI is decoded using a set of operational parameters unique to that scan line number. These operational parameters are adjusted and maintained on a scan line by scan line basis.

Abstract: When logos or other imagery are to be added to compressed digital video bitstreams, certain constraints are applied to the encoder that generates the original compressed bitstream to enable a video logo processor (e.g., at a local broadcaster) to insert logo-inserted encoded data into the bitstream without placing substantial processing demands on the video logo processor. In one embodiment, areas where logos can be inserted are identified and the encoder is not allowed to use image data within those logo areas as reference data when performing motion-compensated inter-frame differencing for pixels outside of the logo areas. Preferably, the compressed data corresponding to the desired location for logo insertion are extracted from the compressed bitstream and replaced by logo-inserted encoded data. As a result, logos can be inserted into compressed digital video bitstreams without having to completely decode and re-encode the bitstreams, while maintaining the overall quality of the video display.

Abstract: A closed caption decoder includes circuitry for processing closed caption according to the Electronic Industries Association EIA-708 and EIA-608 standards. The EIA-708 memory buffers (48) store caption data both for the EIA-708 and the EIA-608 standards. Therefore, the decoder memory requirements are reduced.

Abstract: The tone of video signals is corrected without degrading the tone of certain image features, such as a human face. A gain controller operates and outputs an adjustment value using a histogram output produced by a histogram generator. An average value of picture levels on a screen is detected by an average picture level detector. A histogram correction circuit calculates a look-up table, and a video signal correction circuit corrects the tone of the video signals using the look-up table.

Abstract: An intelligent digital television receiver for receiving a video signal, an audio signal and a digital data transmitted in a digital broadcast, and for executing an application based on the received digital data by itself or in connection with the received video and/or audio signal. The receiver has a controller for controlling executions of applications by generating events according to event start information bearing time information contained in a digital data stream as an object which comprises an element of the application and another controller for controlling executions of the application.

Abstract: A method and apparatus for the processing of video data in which the appearance characteristics of picture elements are modified using digital apparatus such as a color processor which provides a plurality of channels having respective processing means, each channel being adapted normally to operate to process a discrete range of characteristics, wherein the method comprises the step of operating the apparatus in an alternative mode in which at least two of the channels are used to carry out identical processing steps, spatial segments of the video data being split between said at least two channels to thereby increase the speed of processing.

Abstract: A color conversion apparatus in which an output result of a color converting circuit at a succeeding stage for color-converting a specific color can be prevented from being affected by an output result of a color converting circuit at the preceding stage for color-converting a whole image. A first color converting circuit color-converts a whole image of image data in a first color-conversion fashion. A second color converting circuit color-converts only the area of such color in a second color-conversion fashion by adding a correction signal which results from multiplying a key signal indicative of an area of specific color to image data in which the whole image is color-converted in a first color-conversion fashion. A key signal generating circuit generates the key signal from the image data supplied to the first color converting circuit.

Abstract: A projection television set having a screen and three projection units each capable of projecting a monochromatic image onto the screen. The projection units each having a cathode ray tube (CRT) optically coupled to a projection lens, which includes both a C-lens and a compound lens. A spacer preferably having three optical passageways is coupled to and between the CRTs and projection lenses such that three coolant chambers are formed. Preferably, the spacer includes fluid passageways that interconnect the coolant chambers. The spacer also include coolant fill ports and reservoirs, zero pressure gum tanks seated in the reservoirs, and a plurality of heat exchanging ribs.

Abstract: A method is proposed that is used for terrestrial transmission of at least one digital signal, in particular a digital radio and/or TV broadcasting signal. In this method, the at least one digital signal, reduced in its data quantity by coding, is modulated, preferably by the OFDM method, and converted into the frequency position of at least one channel, adjacent to at least one occupied or unoccupied channel (30, 32) for transmitting an analog TV broadcasting signal, and is broadcast in this frequency position. The dynamic scope and the amplitude of the spectrum (41) of the at least one digital signal must undershoot a respectively predetermined value that is markedly less than the dynamic scope or amplitude of the video carrier of the spectrum (35, 36) of the analog TV broadcasting signal, so that there will be only slight intermodulation and cross modulation with other digital signals or with analog signals of other channels.

Abstract: A digital imaging system includes an array of sensors arranged generally in rows and columns and having data lines coupled to the sensors. Receiving logic is coupled to sense voltages on the data lines. A reference voltage generator (which can include a resistor network) generates a plurality of reference voltages in the digital imaging system in response to an applied differential voltage. A test row of sensors are electrically coupled to corresponding reference voltages, each test sensor coupled to a data line and receiving a voltage based on its coupled reference voltage. The receiving logic includes at least one A/D converter that reads the test sensor voltage value and converts it to a digital value.

Abstract: A block to raster converting circuit which is adaptable to all formats with a single circuit is realized. Macro-block data is mapped into a frame memory (13) on the basis of a particular format whose data size (X) in the horizontal direction provides a max condition. When writing, for each macro-block row (MBRi), the address of the first data in the initial macro-block (IMBi) is specified, on the basis of which address the column and row addresses are regularly switched according to the data array in the macro-block (MB). When reading, for each macro-block row (MBRi), the address of the initial data is specified, on the basis of which address the row address is switched every time data in each horizontal line in the macro-block row (MBRi) has been read and every time data at a turn of the column address in the frame memory (13) has been read. The column address is sequentially switched.

Abstract: Method and apparatus for the conversion or generation of a video signal intended to be displayed on an image display with different luminance response times for rise and decay. The conversion or generation of the video signal is so that motion artifacts which are caused by the difference in luminance response times for rise and decay such as large area luminance jumps, large-area flicker and faulty temporary large-area luminance are fundamentally cancelled in the displayed image.