Abstract: An apparatus for processing a video signal by adjusting the contour of a picture. The apparatus includes an arrangement from a delay circuit 2 to a subtraction circuit 5 for extracting a contour of the picture and generating at least a signal opposite in polarity to a contour enhancement signal enhancing the extracted contour. The signal polarity is continuously varied from a maximum value of a positive polarity to a maximum value of an opposite polarity by a variable resistor RV2, an output of which is added to the input video signal by an addition circuit 6. With the processing apparatus, a picture can not only be raised in resolution as felt by the viewer, that is can be enhanced in contour, but also can be lowered in resolution as felt by the user, that is can be softened in contour. A corresponding method for processing a video signal by adjusting the contour of a picture and a video camera having the apparatus for processing the video signal in this manner are also disclosed.
Abstract: A system (FIGS. 7 and 8) and method (FIG. 1) for video tranmission of active events, for example sports events, having in the background physical images in designated targets, wherein the physical images are electronically exchanged with preselected virtual images, so that objects or shadows actually blocking potions of the physical images will be seen by viewers as blocking the same portions of the virtual images, and the motion of players or a ball blocking the physical image will block corresponding regions of the exchanged virtual images, so that the exchange electronic image will remain in the background of the event, exactly as the original image.
Abstract: The method for generating a modulated television signal involves performing a first filtering and a second filtering to obtain two signals, one having a passband that is equal to complete passband and the other one having a passband that is equal to the sideband to be suppressed. The signal having a complete passband is amplitude-modulated with a video carrier, obtaining a first signal. The signal having a passband equal to the sideband to be suppressed is then divided into a first component and a second component, and the first component is phase-shifting by 90.degree. with respect to the second component. The first component is modulated with a video carrier that is phase shifted by 90.degree., obtaining a second signal. The second component of the signal having a passband equal to the sideband to be suppressed is modulated with the video carrier, obtaining a third signal. The second and third signals are then subjected to an algebraic sum, obtaining a fourth signal.
Abstract: This invention relates to an improvement in a portable test pattern illuminator for illuminating a reference image so that the color and tonal range of a camera focussed on the reference image can be balanced to enable the camera to produce a faithful reproduction of objects in a light source having similar characteristics of the general type having a screen with an opening; means for supporting a reference image object in said opening; and a light diffuser panel for transmitting light from a source to the reference object. The improvement consists wherein the reference object is supported by the means for supporting the reference object in parallel relation to the surface of the light diffuser panel.
Abstract: To provide a parallel processor apparatus which can perform processing with a good efficiency on signals comprised of data of different lengths. A parallel processor configured by a serial connection of a first parallel processor and a second parallel processor having n number of individual processors and (m-n) number of individual processors. For signals comprised of data of a length, serving as the unit of processing, of m or less and n or more, these parallel processors are connected and used as a single parallel processor apparatus which performs processing equivalent to that by a conventional parallel processor apparatus. For signals comprised of data of a length of n or less, these parallel processors are independently used to perform pipeline processing and thereby perform two times the amount of processing of that performed by a conventional parallel processor apparatus.
Abstract: In a projection type image display apparatus, the screen is divided and a memory to record luminance correction data corresponding to the divided regions is provided, and addresses of the divided regions of the screen are set by an address counter, synchronized with the input video signal. The luminance correction data are read successively by inputting the addresses to the memory, and luminance nonuniformity on the screen is corrected through operational processing of the correction value converted in an analog value by a D/A converter and the input video signal. The luminance correction data is obtained by computing measurement results of respective luminance characteristics of red, green, and blue colors on the screen and separately recorded as an amplitude correction component and a DC level correction component.
December 13, 1995
Date of Patent:
November 17, 1998
Matsushita Electric Industrial Co., Ltd.
Abstract: A measuring device for measuring a glow center of a display device is provided with: an image pickup device which includes a sensing surface defined by a plurality of photoelectric conversion elements arranged in a two-dimensional manner at a specified pitch and picks up a light image to produce image data; an optical system which transmits a light image displayed on a display device to the sensing surface of the image pickup device; an optical system controller which controls the optical system to transmit the light image to the sensing surface in such a manner that the maximum spatial frequency of the light image at the sensing surface of the image pickup device is smaller than the reciprocal of the pitch of the photoelectric conversion element arrangement; and a calculator which calculates a glow center of the light image on the display device based on image data produced by the image pickup device.
Abstract: When two projecting units or more project two pictures or more obtained from video signals and luminance levels of projected pictures at an overlapped portion thereof are adjusted, a picture to be adjusted is selected from the projected pictures. One of processings for adjusting a correction start point of a correction data, a correction end point thereof and an inclination of a correction curve thereof to be used for a picture adjustment is selected. When the positions of a correction start point and/or a correction end point of the correction data are adjusted by using a remote controller unit or the like, a mark data is superposed on the correction start point and/or the correction end point of the correction data to display a mark formed based on the mark data on the screen together with the projected pictures. Thus, the picture is adjusted by displaying the marks together with the projected pictures.
Abstract: A method of automatic measurement of compressed video quality superimposes special markings in the active video region of a subset of contiguous frames within a test video sequence. The special markings provide a temporal reference, a spatial reference, a gain/level reference, a measurement code, a test sequence identifier and/or a prior measurement value. The temporal reference is used by a programmable instrument to extract a processed frame from the test video sequence after compression encoding-decoding which is temporally aligned with a reference frame from the test video sequence. The spatial reference is used by the programmable instrument to spatially align the processed frame to the reference frame. The measurement code is used by the programmable instrument to select the appropriate measurement protocol from among a plurality of measurement protocols.
Abstract: A television receiver for automatically determining from a command issued from a controller, the control of power on/off, picture brightness and picture contrast of a video projector using a video projector controller contained in the television receiver and for controlling the deployment and retraction of a screen using a screen controller also contained in the television receiver.
October 3, 1994
Date of Patent:
September 29, 1998
Matsushita Electric Industrial Co., Ltd.
Abstract: A circuit device provided in a video signal processing apparatus. The circuit device includes a tuner for tuning a television signal, an IF amplifier for demodulating the television signal, and an RF converter having an RF oscillator for modulating video and audio signals into a television signal in a VHF band. The tuner, IF amplifier and RF converter are accommodated in a shield case. Further, the circuit device includes a circuit including a resonance circuit having a coil and a capacitor for controlling an oscillation frequency of the RF oscillator and a switch for switching a parameter of the resonance circuit to vary the oscillation frequency.
Abstract: A video signal regenerator in color television comprises two video signal regeneration channels each of which has a video signal front detector (5-7) electrically connected to a driving input of a video holding sampler (1-3), while the third video signal regeneration channel has an input receiving a video signal of a pass-band wider than that of other video signals, which channel being analogous to the other regeneration channels and also comprising a video signal front detector (5-7) electrically connected to the driving input of the video holding sampler (1-3).
Abstract: An apparatus is provided which gives feedback to a user of a remote control device, such as that for a television, to indicate when excessive use of the remote control (channel surfing) is occurring. The device detects transmission from a remote control device and counts the transmissions during an predetermined time period. When a predetermined maximum number of commands from the remote control device is received, an indication of such is provided to the viewer. This indication may take the form of a visual indication such as flashing a message, an auditory alarm, disabling of the remote control device by jamming the inferred signal, or automatically controlling operation of the remote control device, which may include turning off the device. Programming of the apparatus through use of the remote control to accomplish advanced features is also provided.
Abstract: Apparatus for processing analog image signals comprising:a plurality of analog image signal channels, each channel including a variable gain amplifier and a high speed video op amp connected to the variable gain amplifier, the op amp having an output and a disable/enable feature, wherein the outputs of the op amps of the plurality of signal channels are connected to a common output; andcontroller for controlling the plurality of signal channels so that only one channel is operable and all other channels are inoperable by setting the gain of the variable gain amplifier of the operable channel to the proper gain and by enabling the op amp of the operable channel and by setting the gains of the inoperable channels to a minimum and by disabling the op amps of the inoperable channels.
Abstract: A remote control can signal equipment that handles a video or audio signal, such as a television. The remote control has a bar with a central longitudinal axis. The bar has a head and is sized to be manually gripped. A thumbswitch mounted at the head of the bar, is approximately aligned with the central longitudinal axis. Also, a signalling device is mounted on the bar for radiating a control signal to the equipment. A processor is coupled to the thumbswitch and the signalling device for commanding through the signalling device in response to a predetermined reciprocation of the thumbswitch an operational change in the equipment, which is unambiguously consummated without further manipulation of the remote control and independently of angular displacement of said central longitudinal axis. For example, the processor can signal the equipment to change channels in response to operation of the thumbswitch.
Abstract: An image screen automatic adjustment apparatus for a video display monitor device is provided. The apparatus includes a microprocessor for handling the operation of the monitor device and for implementing the image screen adjustments. The monitor device has a switch for enabling the image screen automatic adjustment. Push button processor circuitry is coupled between the switch and the microprocessor for signalling to the microprocessor when the switch is enabled. Image inspection circuitry is coupled to the microprocessor for outputting horizontal and vertical image signals and horizontal front-back porch signals. When the image screen automatic adjustment switch is enabled, the image inspection circuitry provides the horizontal and vertical image signals and the horizontal front-back porch signals to the microprocessor for implementing an optimization analysis processing to obtain a set of optimized control parameters including a vertical size parameter V.sub.size, a vertical position parameter V.sub.
Abstract: An audio and video recording and reproduction apparatus and method is described, which uses a movable storage memory such as a memory card, so that audio and video signals are easily accessed without separate editing devices. The apparatus uses a separable memory so that a deck is unnecessary, allowing small, lightweight constructions, and a compression algorithm results in longer playing time, while read/write operations robust to noise are achieved. Also, data desired by the user is easily accessible, and applications as a substitute for magnetic or disk media are also possible.
Abstract: An apparatus for testing video ordered type terminals by using a computer, and a testing method therefor, employ a personal computer and a bit stream board of the computer to form a virtual server of an ordered type video terminal testing system, thereby making it easier to test a video terminal. In the conventional apparatus for testing an ordered type video terminal, a server is required in order to test such a terminal. This server includes a memory system of a large capacity and computer capable of carrying out a high speed arithmetic operation. Therefore, its installation and movement are not easy, while its price is very high. Accordingly, it is uneconomical to procure it only for testing purposes.
Abstract: A method for improving brightness uniformity reduces a decrease of light towards the edges of a display screen (10) of a display tube (1). The extent of the decrease of light particularly depends on an increase of the thickness of the glass of the display screen (10) from the center of the display screen (10) to its edges, and on a transmission of the glass. This decrease of light is corrected by causing the deflection rate to decrease (C1, Cs) from the center of the display screen (10) towards its edges.