Abstract: In order to correct for the afterglow or flare in a flying spot telecine, an afterglow or flare correction circuit comprises a series of stages each of which calculate the proportion of the video signal at any one scan location (e.g. pixel) which is attributable to afterglow or flare from successive previously scanned locations or adjacent locations respectively. Each processing circuit comprises a delay, a multiplier for multiplying the delayed signal by a scaling factor dependent on the amount of decay of the delayed signal or the flare at that location and a substractor for subtracting the output of the multiplier from the measured video signal. The output of the corrector subtracts a portion of the output from the previous scan locations in accordance with the stored scaling factor for that location. The scaling factor is derived over a number of video frames. Each measurement is held in an accumulator and averaged to counter noise errors.

Abstract: A circuit for detecting a square wave television signal in a television receiver includes an oscillator for generating the square wave signal and a phase locked loop (PLL) for synchronizing the square wave signal with the syn pulses of the televsion receiver. The circuit also includes an integrator for switching the output signal of the PLL to a frequency stable square wave signal when the syn pulses are absent and a Schmitt trigger for closing the PPL when a threshold value is reached. With the invention, the syn signals are sensed and a first switchable constant current source increases the output voltage of the integrator for a predetermined period of time when syn pulses are present during the first half of the square wave signal and discharges the integrator when syn signals are absent from the second half of the square wave signal.

Abstract: A programmable electronic product includes a video generator (120) and RF modulator (122) for interfacing with an external video monitor. The programmable electronic product can then be programmed by the product user with the programming information being displayed on the external video monitor.

Abstract: A receiver control circuit for a television, includes a main receiving part, a first receiving circuit, a driving control part, and a comparing part, wherein the main receiving part receives television signals for particular channels and, the first receiving circuit receives the television signals of particular channels and outputs driving adjusting signals. The driving control part outputs driving signals to the comparing circuit which compares the frequency bands of the television signals received by the main receiving part and the first receiving circuit to control the power source of the first receiving in order to prevent minors from watching undesirable broadcasting programs.

Abstract: An EEPROM stores multiple sets of video display parameters for a multi-frequency video display. A microcontroller receives input from a user, changes the stored display parameters and outputs changes in the parameters to the video display. The microcontroller also controls video display apparatus that displays on-screen menus and value indicator graphs for facilitating user input. The video display apparatus incorporates a video clock synchronized to the horizontal synchronization signal of the multi-frequency display, to keep the displayed menus synchronized regardless of the current frequency. In addition, the video display apparatus elongates displayed characters at higher frequencies to control the absolute size of displayed characters across frequencies. The present invention provides for changes to video display parameters, and for resetting the display parameters to factory standards, without manipulating electromechanical devices such as potentiometers.

Abstract: The disclosed device is aimed at improving the light output of this type of device without impairing its homogeneity in colour and luminance while, at the same time, limiting the amount of space occupied. In such a device, three optical valves are placed before three faces of a recombiner cube. The means used to separate a beam of white light into three beams of coloured light consist of a divider cube. The intersections of the treated surfaces of the, two cubes are aligned, and these treated surfaces are in sets of two in one and the same plane. Furthermore, outside the cubes, the optical paths of the three beams are identical, so that the optical distances between the source of white light and the valves are themselves identical.

Abstract: A method and a structure are provided to detect phase errors in horizontal synchronization pulses of video signals. A detected phase error is used to provide a phase correction for each horizontal line of the video image. In one embodiment, the phase correction is provided by a digital filter which takes into account systematic and random components of the phase error. In addition, the phase correction also takes into account accumulated round-off errors in the digital filter itself. A random number generator in the digital filter randomizes the correction for accumulated round-off errors. The phase correction is made smaller than the phase error so as to prevent jittering in the resulting picture.

Abstract: A method and system are disclosed for capturing and processing visually perceptible data, such as address or telephone numbers, within a broadcast video signal. Optically recognizable text, numbers, or visual barcodes representative of text or numbers are transmitted within various frames of broadcast video signals. The broadcast video signal is then received and selected video frames are captured, digitized and stored as Tagged Image File Format (TIFF) in response to a user initiated command. Barcode readers or optical character recognition processes are then utilized to extract textual or numeric data from the captured video frames and that data is stored for future utilization. In one depicted embodiment a user defined template may be utilized to assist the optical character recognition process.

Abstract: A digital camera signal processing device includes an analog-to-digital converting circuit for performing analog-to-digital conversion of a signal supplied from an image sensor, a color-signal separating circuit for separating color signals corresponding to sampling points for respective colors from an output signal from the analog-to-digital converting circuit, and a color-signal interpolating circuit for interpolating color signals for sampling points where no color signals are present, on the basis of the color signals corresponding to the sampling points for the respective colors.

Abstract: A digital video field identification system includes video signals formatted in blocks of video symbols in repetitive data segments with each data segment including a synchronizing signal character. One data segment includes a field timing signal. A field reference data segment which includes the field timing signal is developed at the receiver. Each data segment is compared with the field reference data segment and the number of symbol errors is accumulated for each data segment. The data segment exhibiting the least number of symbol errors is identified as the field timing segment. A confidence counter stabilizes the identification of said one data segment. The video signals are precoded in modulo N form to enable NTSC co-channel interference rejection in the receiver by a linear filter. The linear filter undesirably reduces the S/N ratio by 3dB.

Abstract: A correction signal generating circuit for a television receiver includes a counter for counting a pulse synchronized with a horizontal sync signal, a memory for storing correction data and a coefficient, and a unit for multiplying and adding contents of the counter and the memory. A signal feedback loop supplies an output from the multiplying and adding unit to an input thereof, and a control unit controls operation of the memory and the multiplying and adding unit, thereby generating a correction signal.

Abstract: A video signal process circuit which stretches the black level of a signal voltage for a dark picture and the white level of the signal voltage for a bright picture so as to improve visual contrast and reproduce a clear picture even when a light valve with a narrow dynamic range such as a liquid crystal projector is used.

Abstract: An improved flat display apparatus such as a liquid crystal display apparatus is disclosed. The apparatus is constructed so that when video signals from a VTR is reproduced to be displayed, the switching noise portion included in the video signals is changed to black level before being displayed, the section within the picture image area in which the switching noise originally appeared is masked by black level, making it possible to conceal the disorder in the picture image. In the case where television video signals are to be displayed, the picture can be enjoyed on a wide picture image area because the mask of black level is not generated.

Abstract: A digital processing system for providing spectral headroom to accommodate harmonic distortion components resulting from non-linear processing of digitized samples of video signals is shown. A standard set of video signal samples are all upsampled and filtered so that they have a common sampling rate. These are filtered to provide spectral headroom. Non-linear operations are then performed on the upsampled and filtered sequences. After processing, the processed upsampled signals are filtered to remove the harmonic components, and then the signals are decimated to reestablish their original sampling rates. This provides non-linear processing for signal sequences which were originally band limited, yet avoids the appearance of aliased frequencies in the output that normally result from harmonic distortion components generated by non-linear processing.

Abstract: A signal representative of a television program guide, a signal indicating which program is currently being viewed or recorded and a signal indicating the class of program being viewed or recorded are received at the point of reception of a television program signal. The program guide signal is used to cause a program guide to be displayed on a television screen. A viewer selects one or more programs to be recorded or viewed from the displayed guide and selects a set of classifications that are to be permitted. While the received program indicating signal indicates that the current program is one of the selected programs and the received classifying signal indicates that the current program is of a permitted classification, recording or viewing of the program is enabled. A further extension of the invention causes the program identifying signal to be recorded on a video recording along with the program so that on replay the recording can visually be identified.

Abstract: A universal remote control unit for changing television channels is shaped like a gun to allow a viewer to point the gun at a television set, and shoot the channel to change the program. The unit is gun shaped having a barrel with a muzzle end containing an infrared beam emitter to produce a signal beam to engage an infrared beam receiver of a television set and provide channel selection. A hand grip portion has a trigger which operates a channel selection switch to produce a signal beam from the infrared emitter to change the channel. A channel direction switch selects whether the channel change should be up or down, and a power source is provided for powering the controls and the light beam emitter. In another embodiment a light beam emitter and a sound effect emitter are included in the gun.

Abstract: A television system comprises a first input terminal (20) for providing a composite video (CSCC) signal or a separated luminance (SCC) signal, and a second input terminal (15) for providing a separated chrominance (C) signal. A change-over switch (11) has a first input (a) coupled to the first input terminal (20) through a path including a color sub-carrier filter (9), a second input (b) coupled to the second input terminal (15) through a path not including the color sub-carrier filter (9), and an output (c) coupled to the input (d) of a color decoder (8). The change-over switch couples the input (d) of the color decoder (8) to the first input terminal (20) in a first position (a), and couples the input (d) of the color decoder (8) to the second input terminal (15) in a second position (b). A sub-carrier detector (CK) is coupled to the output (c) of the change-over switch (11) for detecting the presence or absence of a color sub-carrier.

Abstract: Field information for a predetermined number of fields produced by another field judgment circuit is stored in a first memory. The output of the field decision circuit which is indicative of the field information for the predetermined number of fields is stored in a second memory. The contents of the first memory are compared with those of the second memory. When the contents of the first memory disagree with the contents of the second memory for all of the predetermined number of fields, the field information is output as the field information from the field decision circuit.

Abstract: A gamma correction circuit converts digital video data to address data, reads out slope and intercept data for segments of a polygonal line approximation of a desired gamma correction characteristic stored at the address, and uses the read out data to generate a gamma corrected output video signal. Another gamma correction circuit directly uses digital video data to address previously stored level correction data, then uses the level correction data and a coefficient K to generate a gamma corrected output video signal.

Abstract: Present color TV equipment utilizes single fixation whitebalance color temperature reference programs. Such equipment can not give consideration to various disadvantages in image reproducing results. The method and the apparatus disclosed can correct color TV equipment with a dynamic color temperature state using an applicable range along a Planckian locus color temperature band as a white-balance color temperature parameter region, and can make the corresponding relation between hue - color temperature parameters meet requirements of an optimum image reproducing result. Therefore, the reproducing results and the quality of a general appearance of a color TV picture are improved. It is also possible to produce or improve color TV equipment with low cost.