Abstract: A zero-time-delay video processor circuit includes reduction circuitry for eceiving a digital image input and providing a reduced and Nyquist acceptable digital image output signal. A controlled write/read memory connected to the reduction circuitry provides the digital image output. A digital estimator is connected to the reduction circuitry for providing an estimated gain signal. A gain corrector circuit is connected to the controlled write/read memory for compensating for errors in the estimated gain. A signal indicative of the true or required gain is provided to the digital estimator and to the gain corrector.

Abstract: A video line processor for varying the size of a video image portion along a video line in an image processor in which image size variation occurs first along horizontal lines and then along vertical lines and in which intermediate and final frames are stored in memories in which row and column addressing is interchanged on alternate frames. The line processor has a line memory for storing pixel values along each video line, has a pair of arithmetic circuits, one of which receives pixel values delayed in relation to pixel values received by the other, and has a coefficient memory with memory locations corresponding to pixel values along a video line, each of these locations being loaded between video frames with an address for the line memory and with coefficients for the arithmetic circuits to control, respectively, the position of each pixel value along a line and the transformation of the value.

Abstract: A method and processor for varying the size of a digitized video image in bstantially two video frame times by transforming successive lines of the image along one axis and then transforming successive lines of the image along the other axis.

Abstract: A high efficiency modulator circuit for modulating a microwave oscillator having a negative resistance device comprising an IMPATT diode disposed within a resonant cavity is presented. A first transistor comprising a relatively high output impedance, fast transient response, low power dissipation, wideband current source modulates the power applied to the diode thereby reducing power dissipation and improving the power conversion efficiency of the modulator during operation. Current controlling and limiting means is provided in the emitter of the first transistor for controlling and limiting the current to the diode for improving the burn-out reliability thereof. A modulating signal is provided to the base of the first transistor by the emitter of a second transistor connected in a modified Darlington configuration for providing a high efficiency, wideband, low impedance source to the base of the first transistor improving the transient response thereof.

Abstract: Improved modem terminals spaced along a high-frequency triaxial data line a long length. Each modem employs signal delay and differential detection circuitry to detect signals on the line which may have been degraded in transmission. Conversion circuitry and input-output circuitry interface the data line with terminal devices and other data transmission lines.

Abstract: An ultra high input impedance and input voltage range amplifier wherein a low voltage input stage is cascaded with an emitter follower transistor stage which provides an excess current sink to keep the voltage across the input stage at a low value.

Abstract: A means for obtaining east-west and north-south information for characterng a continuous wave laser source using either time blanking and frequency modulation or scanning with orthogonal time functions.

Abstract: A system for fully characterizing monochromatic radiation incident on the stem. The system computes the azimuth and elevation of the point of origin, optical frequency, pulse width, power level and pulse repetition frequency of the source.

Abstract: A technique for effectively sampling continuous signals including signals rapid, sharp pulses, by interrogating discrete portions of the signal through integration rather than by conventional samples.

Abstract: A system for determining the frequency or related characteristic of radiation on a continuous real-time basis includes a prism producing a chromatic dispersion and having two exit paths. One light in one path is attenuated by a constant attenuation factor, the light is attenuated by a constant attenuation factor, the light in the other path is attenuated by a factor that is position determinative. Detectors in each path produce an anolog of the intensities thereof which is processed in accordance with a predetermined function to yield the frequency of the radiation.

Abstract: An automatic threshold circuit to establish a threshold that is a specified umber of db above the input's rms frequency weighted noise value wherein the input is compared with the feedback threshold value, the result of which is coupled to a limiter for providing an output of +1, or -1 volt, depending on the input's relationship to the reference. The output of the limiter is combined with a preselected value and integrated. The integrated output is coupled through a clamping circuit that limits its output to positive values, which values are the feedback voltage coupled to the comparator.

Abstract: A circuit for preventing laser receiver overload caused by sunlight wherein feedback network provides a d.c. current to cancel the d.c. level of the diode current; and, a receiver design alternative to conventional designs wherein higher sensitivity is provided by maximizing the signal to noise ratio and processing by dual equalization to reshape the frequency response to achieve a flat response over the frequency range of interest.

Abstract: The real-time polar controlled video processor electronically rotates scene nformation in a real-time video processor. By dynamically specifying the origin of each desired consecutive output line from subpixel space, and by specifying the delta "X" and delta "Y" inputs (of X-Y Cartesian coordinates) to a real-time coefficient generator, a subpixel generator can sweep through a stored image database at any arbitrary angle and scale factor. Subpixels which are generated sequentially describe any image size, orientation, and position. This scheme allows dynamic line-by-line accommodation of dynamically rotating sensor outputs.