Abstract: When an electric power is supplied to an image communication device of a user to perform telephone communication between the user and a person on the other end of the communication line, an on-off switch is automatically set to an off state on user's side under control of a video mute control unit so as to disconnect a video data coding/decoding unit from a video data receiving unit. Therefore, no video data received in the video data receiving unit is transmitted from the user to the other end of the communication line. Thereafter, when the user inputs a video mute-off instruction, an on-off switch is set to an on state under control of the video mute control unit so as to connect the video data coding/decoding unit and the video data receiving unit. Therefore, video data received in the video data receiving unit is transmitted from the user to the other end of the communication line.

Abstract: A picture signal processing apparatus and method is presented that determines whether there is an odd or even-number field signal in the picture signals received, by referring to flags that are turned on or off in accordance with the result of odd and even-number field detection. If the odd and even-number field flags are on, an image processing operation A is performed. If the odd-number field flag is on and the even-number field is off, an image processing operation B is performed. If the odd-number field flag is off and the even-number field is on, an image processing operation C is performed. In accordance with whether there is an odd or even-number field signal in the received picture signals, an appropriate image processing operation is selected from the different operations. That is, the received picture signals are processed in a mode suitable to the signals, so as to generate suitable image data.

Abstract: Digital visual recording content is indexed and packaged in a manner that facilitates identification of, and navigation through, the digital visual recording content by a viewer. In particular, keyframe displays are presented to a viewer in a manner that facilitates navigation through the digital video content by the viewer. In one aspect of the invention, keyframes are displayed on a visual display device. In another aspect of the invention, keyframes are displayed as part of a video disk package.

Abstract: It is an object of the present invention to provide a video processing apparatus which makes it possible to print a picture having an arbitrary size without forging an original picture. A video processing apparatus according to the present invention includes a print size selecting means 51 for selecting a print size of a printer 3 by selecting a size of a picture frame, a CPU 43 for determining the number of pixels of a video data corresponding to the selected print size, and a memory controller 33 for processing the video data in accordance with the number of pixels so that pixels of a video data output from a camera 1 should be in one-to-one correspondence with pixels of a video data to be printed by the printer 3. It is not necessary to subject the original picture to video processings such as a decimating processing, an interpolation processing or the like.

Abstract: A recording system for preventing inconsistencies between the time information of the AV data which is recorded on the recording medium of the image sensing device (camera integrated digital video recorder and so on), and the time information of the AV data which is recorded on the recording medium of an external recording device. The image sensing device determines whether or not the AV data is recorded on its recording medium when the AV data is digitally output. If it is recorded, the AV data is digitally output with adding change-prohibited information. The external recording device determines whether or not the change-prohibited information is added to the AV data which has been digitally input. If the change-prohibited information is added, the AV data is recorded to a recording medium without changing the time information of the AV data.

Abstract: On the transmission side, an image, for example a black-and-white individual image, is picked up and stored on request by a simple camera, for example with a wide-angle lens and optical viewfinder. The image data of the image message are suitably compressed and subsequently coded with a telecommunications-channel-specific code and transmitted, preferably unidirectionally, indirectly or directly to a telecommunications network (for example a wired or wireless telephone network). On the reception side, the image data are accepted—in a way corresponding to the process on the transmission side—either directly or indirectly. After decompression and decoding, the image data are stored in a screen store and transmitted to the screen, for example an LCD flat screen, according to the instructions of a screen controller.

Abstract: A stand alone flat bed scanner including a CPU, a removable storage medium, a control system displaying digital image and controls for controlling the mode of operation, degree of resolution, related parameters associated with generating, storing and displaying digital data. Ports for printers, accessories and other peripherals, an internal hard drive, and software adapted to display images directly on a television screen, and/or to display images projected from an LCD projector upon a screen, including battery, and a pivotal handle for portable use in environments not having an external power supply. One embodiment, not including an incorporated flat bed scanner function, adapted to receive image data from a conventional scanner unit.

Abstract: A portable, compact Fax Camera Device comprised of a still electronic camera circuitry and an image sensor especially adapted for facsimile, with integrated facsimile communication device, this invention is designed and built specifically for the acquisition and communication of facsimile images in such aspects as resolution, aspect ratios, optical design, mounting capability, tight integration of facsimile circuitry, and capability of receiving facsimile images. The Fax Camera allows easy capturing of fax images from books without the need for photocopying, easy photography type capture of real world objects, as well as convenient regular page image capture and transmission. For regular page and book images, the invention is equipped with collapsible mounting device constructed to allow easy and accurate focus and provides a frame for predetermined size documents. The invention also includes a display device to allow viewing and editing of captured fax images.

Abstract: A facsimile-television system which allows a video image of a television system to be transmitted to a facsimile installed within the facsimile-television system or to another facsimile provided outside the facsimile-television system by using a Group III format converter. The system includes a television system, a facsimile connected to the television system and a facsimile controller.

Abstract: The projector of the present invention provides a means for interactively displaying and annotating a document image at two separate locations. The projector consists of an image plate having an array of picture elements for displaying the image; a projection mechanism for projecting the image displayed by the image plate onto a projection screen; and a digitizer having a coordinate input array which corresponds to the array of picture elements of the image plate, wherein the image displayed by the image plate changes in response to coordinate inputs to the digitizer. A method for interactively annotating an image communicated between a remote and local image includes the procedure of simultaneously transmitting to the remote projector, annotations made to an image in the local projector.

Abstract: An image processing system includes a first image processing apparatus connected to a second image processing apparatus Each apparatus includes a programmable data compressor that performs image data compression in accordance with at least two data compression programs. The first image processing apparatus is able to request the second image processing apparatus to transmit to it a compression program stored by said second processing apparatus, which the first image processing apparatus may then use in its own data compressor.

Abstract: A scanner interface device of video system used with a scanner scanning a scanned object to obtain a scanned signal includes a scanner interface receiving the scanned signal outputted by the scanner and transforming the scanned signal into a preliminary video signal, a converter electrically connected to the scanner interface for transforming the preliminary video signal into a secondary video signal complying with a specific video system format, and a control unit electrically connected to the scanner interface and the converter for controlling the scanner interface device. The present invention is easy to operate and appropriate for use in families, can be used more diversely, and stores more data with less expense.

Abstract: A video processing apparatus uses multiple image signal integration and reduction for decreasing noise. A television camera picks up an image of a still object and outputs image signals repetitively. An adder adds each newly outputted signal to the sum of previously outputted image signals stored in a memory and stores each new sum of image signals in the memory. A circuit divides each new sum of image signals by the number of times the adder has performed additions, thereby providing a signal that is displayed on a monitor.

Abstract: A direct color thermal printer is used with color thermosensitive recording sheet (23), and prints a pixel (i, j) to it in accordance with 8-bit digital data g(i, j), namely brightness data (Y) and chrominance data (R-Y, B-Y). The digital data is compensated by use of a second-order differential operator. An integer 128 is added to the digital data g'(i, j) being compensated. A sum of 128 and the compensated digital data is limited to a range of nine bits, so as to heighten halftone of the pixel to be printed.

Abstract: A system and method for interposing stored images to moving video within multimedia computer programs, wherein the system recognizes specific identifiers upon an object or image that identify that the object or image is a visual aid to be incorporated into the multimedia program. In response to this recognition, a previously stored image associated with the identified object/image is retrieved and inserted into the multimedia computer program.

Abstract: A system for communicating between a plurality of human individuals communicates first information from a first individual to a second individual through a telephone line to thereby direct that a product be produced at a remote location. Second information is written in a personal stylized script onto an information receiving medium to produce a first note page. The first note page is then digitized and transferred from a first location to a second location. The digitally formatted first note page is then received and reformulated at a second location. An exterior box is located at the second location and has upper, lower, front, back and sidewall panels forming a rectangular shaped box having an open front. An open top vase is received and fastened within the box. A receiving frame on the box then receives the second note page for shipment to a final destination.

Abstract: An image input equipment comprises an image input head having an image pickup element and an image input lens built therein, a stage on which an object is to be placed, a supporting pillar for supporting the image input head and positioning the image input head over the stage, said image pickup element for photoelectrically converting an image of the object to an electric signals, said image input lens for forming the image of the object on the image pickup element. The image input head is assembled pivotally on the supporting pillar to pick up the image of the object placed in front of and in rear of the stage as well as the image of the object placed on the stage. The image pickup element can be turned through an angle of at least 180.degree. on an optical axis of the image input lens integral with the image input lens.

Abstract: A video camera system for recording an image of an subject. The video camera system includes; a video camera body for recording the image of the subject; a supporting base for supporting a coupling member; the coupling member for coupling the video camera with the supporting base so that the video camera is mounted on the supporting base, and for releasing the video camera from the supporting base; and a controller for setting functions of the video camera, such as the exposure level, the focusing point adjustment mode, the angle of view, the white balance, and the automatic gain control level, to record the image of the subject within a predetermined focal range when the video camera is mounted on the supporting base.

Abstract: An arrangement for high-resolution scanning of large image formats with exact geometrical correspondence is described. It is applied in photogrammetry and in optoelectronic scanners with high requirements regarding exact geometrical correspondence. Metric image contractions of large image formats are obtained without dimension-embodying auxiliary means by employing a CCD matrix which is exactly dimensioned to pixel sensitivity distribution. This CCD matrix is used as an absolute dimensional embodiment, from which only one active pixel area determined as a function of the memory area of the frame grabber is adopted into the frame grabber while ensuring an image contraction which is absolutely synchronous with the pixels.

Abstract: In a document reading apparatus capable of picking up image data of documents from above position thereof, curvature of the documents is detected by measuring the height of the document surface. In accordance with the detected curvature, interpolative and expansional processing to the picked up image data is executed. Distorted image data of the documents due to the curvature is thereby corrected.

Abstract: The projector of the present invention provides a means for interactively displaying and annotating a document image at two separate locations. The projector consists of an image plate having an array of picture elements for displaying the image; a projection mechanism for projecting the image displayed by the image plate onto a projection screen; and a digitizer having a coordinate input array which corresponds to the array of picture elements of the image plate, wherein the image displayed by the image plate changes in response to coordinate inputs to the digitizer. A method for interactively annotating an image communicated between a remote and local image includes the procedure of simultaneously transmitting to the remote projector, annotations made to an image in the local projector.

Abstract: A telephone terminal adapted for business or home use that includes the ability to receive and send facsimiles, a voice answering function and a computer modem. Various input and output devices may be used for the facsimile function. A voice annotated facsimile may be sent and received. At the same time the facsimile is viewed on a video monitor or ordinary television set, an accompanying voice message is heard through the sound system of the monitor or television set. The terminal has an architecture including a central processor and an internal bus structure to which several types of memory, various input-output devices and an interface with the telephone line are connected, among others.

Abstract: A video-to-FAX conversion system includes a video camera (10) for generating video signals which are then captured by a frame grabber and stored in a frame buffer (14). The data in the frame buffer is comprised of digitized values from the video signal which are stored in pixels with a first aspect ratio. A conversion device (16) is operable to map information in the frame buffer to the binary output space of a Group III FAX protocol and perform contrast enhancement thereon. The contrast enhancement includes the steps of first generating a histogram of all of the pixel values in the frame buffer (14) after expansion thereof into the output space of the Group III FAX. The histogram values are then utilized to generate an adjusted value for each of the gray scale values available for the pixels in the frame buffer 14. Each pixel in the frame buffer (14) is then expanded and the contrast enhancement applied thereto to adjust the values therein.

Abstract: An image data processing system includes a still video camera having a detachable storing medium for storing an image data, and a digital image forming apparatus in which an image of an original document is read by an image sensor to generate an image data, and the image is formed on a paper with electrophotographic process based on the image data. Also, the image data is processed in the image forming apparatus to be stored on the storing medium of the still video camera loaded detachably from the image forming apparatus.

Abstract: The invention relates to a picture memory system for a video printer. Out of continuously incoming video signals, picture signals corresponding to one frame or one field are stored into each of a plurality of semiconductor memories, and the picture just passed can be searched and printed. Therefore, in unilaterally transferred video signals like in television, the desired pictures can be directly printed without incurring the inconvenience of using a video recorder. That is, the multiple steps of recording and reproducing are skipped, and therefore, the degradation of the picture quality can be prevented.

Abstract: A system of transmitting computer display information as facsimile pels through conventional facsimile machines. The system comprises a conversion means for scaling each dot of display into facsimile pels using a scaling factor which is used to scale both the width and height of each dot of display. Each dot of display is output as some whole number of facsimile pels. Given that many facsimile machines have no memory, the facsimile pels are temporarily stored as encoded data and output in a steady stream of data bits to the facsimile machine. This frees up the limited memory of the MCU of the pocket size computer.

Abstract: A video signal processing device is designed to input selectively a first video signal or a sub-sampled second video signal. These inputs are input to a common filter. The output of the filter is output after being sub-sampled, when the first video signal is being input, and without being sub-sampled, when the second video signal is being input. The output level of the filter is changed over between when the first video signal is being output and when the second video signal is being output.

Abstract: In quantizing and dequantizing circuity for an image data companding device, a selective inputting circuit selects either of image data undergone orthogonal transform and data undergone decoding. A multiplier multiplies the data selected by the inputting circuit by quantization coefficients or reciprocals thereof for dequantization or quantization. The quantization coefficients or the reciprocals thereof are rewritably stored in a RAM (Random Access Memory) in matching relation to input data and transferred from the RAM to the multiplier. The quantization coefficients are read out of a look-up table which stores a plurality of kinds of quantization coefficients. A ROM (Read Only Memory) stores the reciprocals of quantization coefficients beforehand. In the event of quantization, particular reciprocals matching quantization coefficients fed from the outside are read out of the ROM and transferred to the RAM.

Abstract: There is disclosed a color image forming apparatus provided with an input terminal for plural input color component signals and an output color component control signal, a processing circuit for processing the input color component signal to obtain plural output color component signals specific to the apparatus, and image forming means for forming each color component image according to the value of each output color component signal, in which the processing circuit is capable of controlling the calculation of output color component control signals according to the value of the output color component control signal.

Abstract: A photovideo camera takes visual images formed on negative films and/or positive films to obtain video signals corresponding to the visual images. The camera unit of the photovideo camera can be focused after determining a desired angle of view by zooming, without changing the desired angle of view. In focusing the lens unit, only the master lens of the focusing lens system of the lens unit is moved.

Abstract: In an image input device having an image placing board for placing thereon an image to be read, an image sensing part which reads the image, a supporting part arranged to support the image sensing part in such a manner that the position of the image sensing part relative to the image placing board is variable, an adjusting part arranged to adjust the image sensing part and an illumination part arranged to illuminate the image, a control part is arranged to cause the adjusting part to operate when the position of the image sensing part changes and to cause the illumination part to be turned off when the degree of change of the position of the image sensing part relative to the image placing board exceeds a given degree.

Abstract: A digitizer is provided with a camera, a movable stage and a control device. The stage may be moved by first and second linear motors such that the digitizer can be used in non-stationary or vibrating environments. A bundle of fiber optics is used to constantly illuminate a patch of an image to be digitized. Also, a control device is provided between the camera and the first and second linear motors for controlling the camera and the positioning of the stage. Various sized images can easily be digitized while memory requirements are kept low and speed is kept high. This digitizer provides for an adaptive dynamic range as well as an improved contrast sensitivity. Also, a mechanism for correcting the effects of skew and keystoning is provided which enables collection of seamless mosaics.

Abstract: A facsimile broadcasting receiver comprising an index program detector and a recording means, the detector detecting an index program number from a facsimile signal. The detected index program number is recorded into the recording means so that the corresponding index program will be automatically recorded.

Abstract: A raster output scanner interface apparatus for receiving subpixel address data and pixel video data that are synchronized with a raster output scanner on a pixel basis, and for sending video output to the raster output scanner that is synchronized with the raster output scanner on a pixel basis. The apparatus provides a programmable switch that receives as inputs both the pixel video data and the pixel video data delayed a programmable amount by a programmable delay buffer. The output of the switch is the video output that is sent to the raster output scanner. The amount of delay of the programmable buffer is programmed by a controller in response to the subpixel address data. The controller also controls the switch in response to the subpixel address data and the pixel video data.

Abstract: A matrix multiplier used in a picture transforming coder is provided for multiplying an input signal matrix by a coefficient matrix configured to comprise as many constant multipliers as absolute values of coefficients in the transform coefficient matrix for handling the signal matrix as common multiplicands, a plurality of selectors for selecting values necessary for computing elements of the matrix product from multiplication results output by the constant multipliers and a respective accumulator assigned to each of the selectors for accumulating the selected values to finally provide an element of the matrix product. As a result, since the processing can be done by merely performing as many fixed multiplications as absolute values of the coefficients in the transform coefficient matrix, the multipliers can be implemented as a relatively simple combination of adders, allowing the entire size of a picture information transforming coder or the like to be reduced.

Abstract: A calibrated scanner is disclosed. The calibrated scanner includes a sensor board with a Charge Coupled Device (CCD) having two output signals. The sensor board also includes two offset devices, a coarse offset and a fine offset, the coarse offset being connected to the two output signals, the fine offset being connected to one of the output signals. The offsets are adjusted to provide a nonclipping DC bias for the two output signals. The sensor board also includes two gain devices, one gain device being attached to each output signal. The gain devices are adjusted to balance the two output signals. After these adjustments, the saturation level of the CCD is determined. The saturation level information is then used in readjusting the gain and offset devices. After this calibration, a linear correction may be applied to the output signal of the sensor board. The linear correction is accomplished by determining dark and light values of the sensor board.

Abstract: A level of an input luminance signal for a pixel is compared with step values which change stepwise in level in a predetermined range of level, and distribution of the levels of the input luminance signal in the predetermined range of level is represented by a cumulative histogram. Subsequently, a histogram value is derived from the outline of the cumulative histogram, and a compensation value is produced on the basis of the histogram value, and the compensation value is added to the input luminance signal, and hence a compensated luminance signal is output to control the luminance of a video image.

Abstract: A digital electronic still camera has an image pickup device to pick up an image to be photographed. The picked-up image data is compressed by a data compressing unit using the two-dimensional discrete cosine transformation (DCT), the optimum quantization table, and the Huffman coding. The optimum quantization table is selected by comparing a characteristic parameter of the image data with preliminarily obtained values for respective image kinds. The two-dimensional DCT provides transformation coefficients of image, which are linearly quantized with reference to the optimum quantization table. The quantized data is coded by the Huffman coding method to have a minimum length. The coded data is sent to a recording device, which records the coded data in a recording medium such as a memory card. Fuzzy control theory may be applied to determine whether the image attributes to a document, a portrait, or a landscape. The image attribute may also manually be set, for example, on an input device.

Abstract: A scanner useful as an input device for a computer is operable in two scanning modes: a prescanning mode in which subsampled images are composed and rapidly output to the computer for substantially real-time display, and an input scanning mode in which three successive high resolution color separations are obtained and displayed on a computer screen for color balance. A fixed color image is supported on a movable, hand-manipulated stage that interactively controls the conjugate distances of the optical system so that zooming and cropping is obtained in the prescanning mode without losing focus. The input scanning mode provides color separations useful in evaluating color balance. By defining a window overlying a selected area of the displayed color image containing neutral colors, color balance correction factors are automatically obtained for scanning values within the defined area.

Abstract: A system and method has one or more store and forward facilities, (SAFF) each associated with a plurality of subscriber facsimile machines. The SAFF include a computer for controlling operations and mass data storage equipment. A subscriber to the system delivers an outgoing facsimile message to the SAFF with which it is associated, which records the fax message, together with data as to originating facsimile machine and destination facsimile machine. The SAFF then delivers the facsimile message to the intended receiver facsimile machine, either directly or through another SAFF. If unsuccessful on an initial attempt, the SAFF periodically retries to send the facsimile message. The system also provides spooling of all facsimile messages for an intended receiver machine, which are all spooled upon connection with the receiver machine. Subscriber mailboxes are provided as part of the mass storage, which can be accessed by a subscriber to have his messages delivered to any facsimile machine he designates.

Abstract: A method and apparatus are disclosed for automatic brightness and contrast control in a digital image capture system. A video camera is utilized to scan an image and generate an analog output signal indicative thereof which is utilized to create rows and columns of picture elements. The image is initially scanned utilizing a trial brightness and contrast level and then analyzed to determine the number of saturated picture elements within the scanned image. Thereafter, the brightness and contrast levels are adjusted so that the number of saturated picture elements tends toward a selected small number. In a preferred embodiment of the present invention, the analog output signal is digitized and each picture element created therefrom has a digital value associated therewith. Analysis of the scanned image is accomplished by counting the number of picture elements having a selected digital value.

Abstract: A facsimile equipment including an image data storing RAM for storing communication image data sets, a liquid crystal display for displaying the image data, numeral keys for designating a desired one of the image data sets stored in the image data storing RAM and demanding display of the desired image data set on the liquid crystal display, a search controller for searching an address corresponding to a line including the first pixel bit in the designated image data, and a display controller for reading the designated image data set stored at the searched address and the subsequent addresses by an amount equal to the number of bits displayable on the liquid crystal display and displaying the image data read on the liquid crystal display.

Abstract: A video image reading apparatus stores video data from a reader of the video image of an original document and outputs the stored video signals as a standard television video signal by successively reading the video signals from the video memory in a timing relationship complying with a given standard television format. The present invention makes it possible to reduce the storage capacity of the video memory by comparing the lower-order bits of the video data from the video image reader with a reference data which cyclically changes and by adding a result of comparison to the higher-order bits to store the sum to the video memory.

Abstract: A digital video compression system and an apparatus implementing this system are disclosed. Specifically, matrices of pixels in the RGB signal format are converted into YUV representation, including a step of selectively sampling the chrominance components. The signals are then subjected to a discrete cosine transform (DCT). A circuitry implementing the DCT in a pipelined architecture is provided. A quantization step eliminates DCT coefficients having amplitude below a set of preset thresholds. The video signal is further compressed by coding the elements of the quantized matrices in a zig-zag manner. This representation is further compressed by Huffman codes. Decompression of the signal is substantially the reverse of compression steps. The inverse discrete cosine transform (IDCT) may be implemented by the DCT circuit. Circuits for implementing RGB to YUV conversion, DCT, quantization, coding and their decompression counterparts are disclosed.

Abstract: A medical imaging system includes a video interface connecting different medical imaging modalities to a laser printer. The video interface includes a clock recovery phase-lock-loop (PLL) as a frequency synthesizer video signal from a modality. A second PLL inserts a pulse train equal to the horizontal frequency into an analog video signal having a vertical sync interval with no serrating pulses. This assures the clock recovery PLL will maintain lock during the vertical sync interval.

Abstract: A video-to-facsimile signal converter includes means for receiving and converting a video signal representing a continuous tone video image to a facsimile signal for transmission to and reception by a facsimile receiver for simulation of the continuous tone video image. An analog-to-digital converter receives and converts an analog video signal to digital video data which is captured by a video data two-field buffer. A digital signal processor, in conjunction with a memory look-up table, processes the captured video data by: interpolating the video data from the video resolution up to a higher facsimile resolution; selectively enhancing the image by sharpening image edges; precompensating the interpolated video data by altering its contrast transfer function; and dithering the interpolated and precompensated video data to produce video pel data blocks which correspond to the original video pixel data blocks and have similar composite gray-scale values.

Abstract: An image data processing apparatus includes a converter for subjecting each block to a discrete cosine transform (DCT) to convert blocks into DCT coefficients, a first memory for temporarily storing the DCT coefficients, a second memory for storing threshold values of a quantization matrix which is used for quantizing the DCT coefficients, a quantizing part for quantizing the DCT coefficients, a differential part for obtaining a difference in D.C. components of quantized DCT coefficients related to present and previous blocks, a zero detector for detecting whether or not A.C. components of the quantized DCT coefficient are zero coefficients, a counter for counting a number of successive zero coefficients of the A.C. components, a coder for subjecting the D.C. and A.C. components to a Huffman coding to output a coded D.C. and A.C.

Abstract: Data stored on a remotely-located storage sheet (29,30,31) which may, for example, be a sheet of a spare-parts manual used in the motor trade, can be updated by transmitting a signal from a central station (20) to a receiver (21,22,23) at the remote location. The storage sheet may be in the form of a microfiche. A liquid crystal storage device is used as the storage sheet, which device can be updated by light from a simple laser printer, an imaging array, or a CRT screen at the remote location, operated by the transmitted signal. This avoids the need to replace storage sheets when updating is necessary. The storage sheet may include two electrically conductive layers (2,6) between which are disposed a layer of a liquid crystal storage material (5) and a photoconductive layer (3). The liquid crystal material may be, for example, a liquid crystal polymer or a glassy nematic liquid crystal material.

Abstract: A portable video-photo machine for permitting a person being photographed to see how he or she will appear the photograph prior to the printing thereof. The machine comprises a collapsible housing having a video camara, video monitor, a still-frame apparatus, and photograph printing device associated therewith. The machine also comprises transporting means and a stand alone power source to facillitate its portability.

Abstract: A video signal hard copying apparatus for printing on a copying sheet of paper input color video signals including R, G, B signals, and horizontal and vertical synchronizing signals as a color image signal includes D/A converter means for generating reference voltages each changing stepwise, comparator means for comparing the color image signal with the reference voltages to provide digital signal patters composed of logical "0s" and/or logical "1s" indicative of the state of the color image signal, and memory means for temporarily storing the digital signal patterns for later associated processings.