Abstract: An image composing apparatus adapted to produce a composite image in which a value of each of picture elements is represented by a maximum value or minimum value of the brightness of a video signal as well as a corresponding other signal at the instant of the maximum or minimum value. A composite image is formed in which a value of each of picture elements is represented by a count of synchronizing signals or an externally applied timing, position or angle indicative external input signal at an instant that the video signal attains the maximum value or the minimum value for each picture element.

Abstract: An infrared video camera shading correction device which includes an averaging circuit for averaging during a few frames the output of an infrared image sensor to provide an average output, a shading pattern generator for generating a shading pattern similar to that of an optics of the infrared video camera, a multiplier for multiplying the average output by the shading pattern signal to provide a multiplication output, and a subtractor for subtracting the multiplication output from the infrared video signal of the infrared image pickup section for effecting shading correction.

Abstract: The assembly (10) is a real-time imaging device for detecting radiation from an object field which is periodic in time. A video camera (14) detects emitted and reflected radiation from the object field (12) and produces a video signal comprising a series of pixels representing a frame of the image. The video signal is digitized (18) and received by a processor (16). The processor (16) averages the successive frames as in-phase images and quadrature images based on the periodicity of the object field to eliminate unsynchronous noise from the image and to display an image synchronous with the periodicity.

Abstract: A digitizer board is disclosed of the type which can be coupled to the data bus of a standard personal computer to enhance the data processing capabilities of the computer. The digitizer board is adapted to receive a composite video signal input which includes information for reproducing an image, e.g., television images. The composite video signal also includes a composite synchronization signal which carries information for synchronizing reproduction of the image from the composite video signal. The digitizer board responds to the composite video signal to digitize the image signals such that the digitized image signals may be readily stored, transmitted or reproduced using standard digital data processing apparatus.

Abstract: A scene to be monitored (e.g., at a remote location or at a later time) is captured as a series of still images. These images are digitally encoded and stored in a digital memory for subsequent retrieval and viewing. If the scene includes a moving object (e.g., the side of a moving freight train), the images may be taken so that they are substantially mutually exclusive and collectively exhaustive of the moving object. During playback, two or more adjacent images may be displayed adjacent to one another so that any feature partly present in adjacent images is visible as a whole. If the observer is at a location remote from the point at which the images are taken, various techniques can be used to facilitate transmission of the image information (preferably in digital form) via relatively low-cost transmission links such as voice-grade telephone lines.

Abstract: Improved apparent picture quality in film-to-video transfer television systems operating in accordance with an odd ratio between film frame display rate and television scan field/frame rate and wherein the video scan line rate is multiplied by an integer for display at an output television display device is achieved by the steps of:a. transferring each film frame to a television signal of predetermined numbers of even and odd video fields at nominal line scan rate in accordance with a predetermined transfer scheme related to the odd ratio;b. putting the television signal through a transfer medium;c. receiving at a receiver the television signal from the transfer medium;d. selectively passing the received television signal through plural, series connected field period delays to provide an undelayed portion and plural delayed signal portions, the total number of such portions being related to the odd ratio;e.

Abstract: A synchronizing system is provided for reliably passing data across a boundary between two independent, non-correlated clocks, referred to as the receiving and transmitting clocks. The system reduces occurrence of errors due to asynchronous samplings to an arbitrarily low level based on metastable operation. The system is organized as a two port memory with unit distance code addressing the memory cells. It performs a handshake between the two non-correlated clock systems to allow for any ratio between the two clocks.

Abstract: The invention relates to a device for controlling the presence of information concerning images in video signals applicable to a video receiver. The device includes a line detector (3) to detect a predetermined row line with respect to a first line of an image, line cutting circuit (6) to cut this line between two successive instants (t2-t1), and a comparison circuit and counting circuit (8, 15) in order to determine and count transitions characteristic of luminance for a predetermined row line between the successive instants (t2-t1). An alarm (48) is triggered or set off by counting circuit (15) when the number of transitions reaches a threshold not to be exceeded. Application for detecting a test card, for monitoring premises, etc.

Abstract: An NTSC compatible widescreen EDTV system comprises three components: (1) a main component containing center panel information and low frequency side panel information; (2) an auxiliary component containing side panel high frequency information; and (3) an auxiliary component containing extra high frequency luminance detail information. Components (2) and (3) are transmitted as a suppressed carrier dual single sideband signal wherein component (2) occupies one of the upper and lower sidebands exclusively, and component (3) occupies the other sideband exclusively.

Abstract: A television synchronization system in which a bipolar signal having a waveform including a front porch (304), a negative polarity pulse, a positive polarity pulse and a back porch is used as a horizontal sync signal, and a composite signal having a waveform including the positive polarity pulse, the back porch, a negative polarity pulse with a wide pulse width, a front porch and a negative polarity pulse is used as a vertical sync signal. When separating and reproducing the sync signals from a television signal transmitted through a transmission line, deviation of the reference phase can be eliminated so that the accuracy of the reproduced phase is improved. Therefore, the television synchronization system is preferably used in a high definition television system.

Abstract: A video memory, for use with a video tape recorder, a television receiver of the like to process a picture, is simplified and can achieve the functions of a time base corrector, a noise reducer and a comb filter, so as to considerably improve the quality of a video picture. A frequency converting circuit for use with the video memory includes a comparator for comparing first and second address signals and an address correction circuit connected to receive an output signal from the comparator. When a crossing occurs between the first and second address signals, the sequential order in which an address signal is supplied to the memory is switched by the address correcting circuit, to thereby derive a continuous output signal from the memory.

Abstract: The present invention relates to a scanning type image reading apparatus. The image reading apparatus includes a generator for generating serial signals each time when the scanning system is driven by a predetermined degree, and a line sensor of the reading apparatus is caused to execute the image read out operation upon reception of said signals. The read-out image data by the line sensor is compensated in response to the detected moving speed of the scanning system detected at every predetermined degree.

Abstract: A digital signal processing circuit for carrying out a series of processings for a digital signal having a signal effective interval and blanking interval such as a video signal. Operation control data added to the blanking interval of the input digital signal controls the signal processings of a plurality of signal processing blocks, so that the circuit construction can be simplified and complicated signal processings can be achieved.

Abstract: In a memory control apparatus for providing various video display functions by means of a video memory into which video data constituting successive units, such as, frames or fields, or video information are written at repeatedly changing write addresses while concurrently reading out the data from repeatedly changing read-out addresses; the video memory is provided with at least four memory areas each having a capacity to store one of the units of video information, impending overtaking of the write and read-out addresses relative to each other is detected, and, in response to such detection, the one of the memory areas in which the data is being written or read-out is changed so as to maintain a separation of the write and read-out addresses sufficient to ensure avoidance of overtaking and consequent disturbance of the displayed image.

Abstract: A circuit is arranged to derive the internal vertical synchronizing signals and field identification signals for a digital television signal. The circuit operates from the internal horizontal synchronizing signals and the separated external synchronizing signals and employs a sign inverter, an accumulator, an absolute value device, a comparator, a counter and AND gates, as well as an OR gate. These components, as coupled, produce the above-noted signals by digital generation and requires no subcircuits that are independent of the horizontal oscillator which horizontal oscillator is arranged in a phase lock loop.

Abstract: A digital data slicer circuit causes the slicing level to track a teletext signal in optimum fashion even if the teletext signal has many successive zero crossings. The digital data slicer circuit substantially prevents any lock-in in either of two other, stable states. This is achieved essentially by applying a zero signal via two changeover switches to an accumulator and a sign inverter when many successive zero crossings are detected by a logic circuit that controls the changeover switches.

Abstract: A method and apparatus for imbedding digital data and multiple audio (analog) track information in a video signal in a manner compatible with ordinary broadcast TV and transparent to a conventional television receiver is disclosed. The method and apparatus may provide multiple independent audio tracks and a substantial level of interaction with a viewer utilizing special reception equipment, which equipment may be utilized to provide a fully interactive system from signal sources not required to be compatible with convention receivers. The method and apparatus includes the ability of imbedding both analog and digital signals in a video signal, and while advantageous for interactive TV systems, may be used for a multitude of purposes in various video systems.

Abstract: Both the analog and the video component of a television signal are converted to digital form, the audio component being converted at a much lower sample rate with a word length which is an integral multiple of the video word length. The digital audio component is then compressed by use of a temporary memory and read-out therefrom at a rate that is half of the sample rate of the digtal video component, after which the word length is halved and the word rate doubled in a shift register circuit. In that form the audio component is inserted in horizontal blanking intervals of the video component in a compatible form by a multiplexer, the output of which is read into a single picture field or full picture memory under control of an address generator clocked in synchronism with the incoming video component. The buffer memory is read-out at a rate controlled by a reference signal such as is used for synchronism in a television studio.

Abstract: A synchronizing pulse signal generation device separates horizontal and vertical synchronizing signals from a video signal; generates a clock signal which is phase locked relative to the phase of the horizontal synchronizing signal; and generates, by using the clock signal, a synchronizing pulse signal which is phase locked relative to the vertical and horizontal synchronizing signals.

Abstract: There is disclosed an image processing apparatus capable of rotation or size change of an image, without lack of pixel data after image processing. For this purpose a destination address is calculated from a source signal, then source addresses are determined corresponding to the vicinity of the thus calculated destination address, and data values for such vicinity area are determined from the source data corresponding to such source addresses.