Abstract: A two-color reading system includes binary encoders for signals of wide and narrow wavelength ranges. The reference level of the narrow wavelength encoder is set proportionately to the level of the wide wavelength signal by means of a voltage divider, so that the second color of the two color system may be more accurately separated.

Abstract: An improved circuit for detection of horizontal sync pulses for use in high esolution digital processing of video data when low line-to-line registration uncertainty is required. The detector comprises three main parts, a negative peak detector, a proportioning amplifier and a high speed comparator for level detection. The peak detector allows a reference point to be established over a wide signal and temperature range with little error due to inherent accuracy and stability of the operational amplifier circuitry, and has an ability to adjust the triggering point of a comparator dependent upon video signal level.

Abstract: Motion induced image distortion resulting from processing video signals in a frame-to-frame comb filter is substantially reduced by extracting motion induced luminance cross components in frame combed chrominance signal and reinserting them in the frame combed luminance signal. The chrominance signal is applied to a low pass filter to extract luminance components for reinsertion in the combed luminance signal. Higher frequency luminance cross components required to completely compensate the combed luninance signal are rejected by the low pass filter, however, to account for the missing high frequency luminance cross components, the combed luminance signal is selectively low pass filtered during interframe motion intervals before reinsertion of the cross components.

Abstract: An improved image processing method uses a modified Walsh-Hadamard transform to remove noise and preserve image structure in a sampled image. Image signals representative of the light value of elements of the image are grouped into signal arrays corresponding to blocks of image elements. These signals are mapped into larger signal arrays such that one or more image signals appear two or more times in each larger array. The larger arrays are transformed by Walsh-Hadamard combinations characteristic of the larger array into sets of coefficient signals. Noise is reduced by modifying--i.e., coring or clipping--and inverting selected coefficient signals so as to recover processed signals--less noise--representative of each smaller signal array. The results exhibit acceptable rendition of low contrast detail while at the same time reducing certain processing artifacts characteristic of the unimproved Walsh-Hadamard block transform.

Abstract: An improved movement detector (8) for a television noise reduction system interposes a recursive filter (12) between the absolute value circuit (9) which signalizes the magnitude difference between delayed and undelayed television signals and the function generator (11) which forms the correction factor k which controls the degree of noise reduction. Especially for filtering changes in the vertical direction and the recursive filter involves a considerable saving in equipment.

Abstract: In a wideband video signal processing system, video output signals from a video driver amplifier are passively AC coupled to an intensity control electrode of an image display device. A keyed feedback DC restoration circuit is connected to the intensity control electrode via a high impedance resistor network comprising the feedback path of the restoration circuit. Image brightness control is accomplished via the restoration circuit without varying the operating point of the driver amplifier.

Abstract: A residential or commercial circuit breaker of the narrow width type, typically having a width of 3/4 inch or 1 inch, is provided with a magnetically permeable slot motor 102 mounted within the case 2 and around both current carrying conductors 8 and 12 for concentrating magnetic repulsive force and boosting the contact separating force.

Abstract: An imaging system for obtaining information within the diffraction limit comprises an illuminating source of radiation, e.g. a laser. A lens system focuses radiation from a small area of an object onto a detector array in an image plane. The detectors measure the amplitude of the received radiation giving a matrix of information. This matrix is then inverted by a computer to reconstruct the image for observation on a cathode ray tube. The object is scanned by scanning the radiation or stepping the object.

Abstract: In a focusing voltage output circuit for a cathode ray tube, a variable impedance circuit is connected in series with a variable resistor for adjustment of focusing voltage. The impedance of the variable impedance circuit is changed in response to a video luminance signal or a beam current to change the focusing voltage so as to optimize the focus tracking characteristic.

Abstract: An AFC circuit for a television receiver capable of unambiguous operation with substantially offset signal frequencies has a response characteristic defined by a positive portion intermediate a pair of substantially equally sized negative portions. The circuit includes a multiplier with an unbalanced coupling between the limiter and the discriminator which has a single adjustable tuned circuit nominally tuned to 45.75 MHz.

Abstract: A residential or commercial circuit breaker of the narrow case type, typically having a width of 3/4 inch or 1 inch, is provided with a combination slot motor and arc chute 102 mounted within the case 2 and around the current carrying conductors 8 and 12. The combination slot motor and arc chute 102 concentrates the current-induced magnetic repulsive force between the conductors 8 and 12 to boost contact separation force, and also extinguishes the arc. The slot motor portion 106, 108 of the combination structure 102 continues to support the magnetic force which tends to force the arc into the arc chute portion 104 away from the contacts 10, 16 and operating mechanism. The combination slot motor and arc chute 102 is particularly simple and inexpensive, yet very effective within the size constraints of the narrow type breaker case 2.

Abstract: The invention relates to a method for the testing of a workpiece which is moved past a stationary camera in order to record a sequence of images, the images being subsequently superposed so that the movement of the workpiece is compensated for Low-noise images of the workpiece are thus obtained.

Abstract: An adaptive predictive coding system for television signals, in which noting the movement of a picture, adopts the inter-frame prediction value in a case of the picture being decided to be a still picture and, in other cases, compares the inter-frame, into-field and intra-field prediction values with each other in terms of magnitude taking into account the quantity of movement of the picture and adopts the prediction value which would not make the coding efficiency the worst, spo that a stable and high coding efficiency can be achieved.

Abstract: A residential or commercial circuit breaker of the narrow case type, typically having a width of 3/4 inch or 1 inch, is provided with a single-piece nonlaminated slot motor 102 mounted within the case 2 and around current carrying conductors 8 and 12 for concentrating magnetic repulsive force and boosting contact separation force. A dramatic increase in short circuit interruption capacity is achieved, at minimal cost.

Abstract: An image of periodic color-filter stripes derived by a periodic lenticular array is made to coincide with a periodic pattern of discrete solid-state light cells of an imager, despite manufacturing tolerance errors in the values of the respective periods of the filter and array with respect to the value of the period of the imager. This is accomplished by angularly displacing each of the respective axes of the periods of the filter and imager, with respect to the axis of the period of the array, by a calculable amount.

Abstract: A subcarrier regenerator circuit for use in color television receiver demodulators. The regenerator includes a voltage-controlled oscillator and a fixed frequency oscillator set to the nominal subcarrier frequency. During the vertical retrace period, a phase detector forces the output of the voltage-controlled oscillator to match that of the fixed-frequency oscillator. The output of the detector is also stored. During the active vertical scan, the phase detector compares the voltage-controlled oscillator output with the color burst synchronization signal and produces an output which is added with the stored output. The added signal is used to adjust the output of the voltage-controlled oscillator to match the color burst signal in phase and frequency, so that the output can be used by the synchronous color signal demodulators.

Abstract: There is disclosed a VIDEO AUTOMATIC FOCUSSING SYSTEM in which a video signal from the television camera is directed to a band pass filter and then detected to produce a DC signal indicative of the video signal as band limited. The detected signal is directed to the inputs of a negative slope detector and peak detector. The detectors monitor the slope of the video signal to form the basis for controlling the motor to achieve automatic focussing on command.

Abstract: A high voltage generator in a television receiver responds to horizontal deflection rate signals from a horizontal oscillator which normally responds to a horizontal sync signal derived from the television signal. A sync validity detector provides a control signal indicative of the validity of the horizontal sync signal to an electronic tuning system in order to identify active channels, and to the deflection system to inhibit the response of the deflection system to false sync signals otherwise capable of causing the oscillator to operate a lower frequency likely to cause the high voltage generator to develop an excessively high voltage.

Abstract: In a digital television receiver, a signal processing stage generates color mixture digital signals representing color picture information as components in a first color mixture coordinate system such as the I-Q system. The I and Q digital signals are applied to a read only memory look-up table in which memory locations are stored the logarithmic values of the signals in order to convert the signals into digital words represented in logarithmic form. A microprocessor or other digital circuit generates or retrieves digital coefficients in logarithmic form that enable the I and Q digital signals to be transformed into second color mixture digital signals representing the color picture information as components in a second color mixture coordinate system such as the R-Y, B-Y, color difference coordinate system. The I and Q digital signals in logarithmic form are applied to a first input of an adder.

Abstract: A fiber optic direct current coupled data transmission link having a response extending to dc by using a dc coupled receiver and a modified frequency response to avoid data width distortion which allows the dc coupled receiver to work over a wide range of input signal levels.