Abstract: A method of correcting color purity is provided for reducing differences in picture quality between film images and television receiver images by the video signals, thus enabling reproduction of picture quality that approximates images that are shown in a movie theater. When outputting signal levels of each of the color components of video signals, color mixing is performed in which the output signal level is the sum of products of all of the color component levels that have been received as input multiplied by coefficients. By setting these coefficients within the range −0.3 to 0.3, the influence from other colors can be limited to prevent excessive change from the colors of the original image.

Abstract: A method of correcting color purity is provided for reducing differences in picture quality between film images and television receiver images by the video signals, thus enabling reproduction of picture quality that approximates images that are shown in a movie theater. When outputting signal levels of each of the color components of video signals, color mixing is performed in which the output signal level is the sum of products of all of the color component levels that have been received as input multiplied by coefficients. By setting these coefficients within the range −0.3 to 0.3, the influence from other colors can be limited to prevent excessive change from the colors of the original image.

Abstract: A color saturation correction method is provided that, by means of a simple circuit configuration, can reduce dissimilarities in picture quality between images that are projected from film and images obtained from video signals, caused by over-saturation of colors in dark scenes. The luminance signal level of a video signal is detected and the saturation of colors in dark portions is then corrected by reducing the chrominance signal level depending on a luminance signal level when the luminance signal level is at or below a predetermined level. The luminance level at which adjustment starts is preferably set to 50% or lower, and the chrominance signal output gain is preferably −3 dB or greater.

Abstract: An apparatus and method for increasing perceived reflectance of the blue component in a video image to achieve a balanced, full-color image when viewed on a video projection screen. The apparatus includes a video projection screen having a plurality of blue reflective elements, interspersed in an even distribution throughout a plurality of standard white reflective elements, for modifying a reflective index of the video projection screen to decrease the gain of the red and green components of a standard video transmission, resulting in an increase in perceived reflectance of the blue component of a video image when projected on the video projection screen. The method comprises the steps of adding blue pigment to a standard white projection screen; decreasing, responsive to the blue pigment, a red-green gain; and viewing a balanced, full-color image having a perceived increase in the reflective intensity of the blue component.

Abstract: A system and method for eliminating flicker in an interlaced video-display image using an input-video processor, a feature-video processor, a frame buffer, an RGB-output processor, an output-video processor, a control processor, and a synchronized-clock doubler. An input video signal is processed as processed component video information and written to a video memory at a horizontal-scan rate and a vertical-scan rate. Based on the input video signal, a vertical-scan synchronization pulse and a horizontal-scan synchronization pulse are generated and then harmonically doubled. The processed component video information is read from the video memory, responsive to the harmonically doubled synchronization pulses, at a harmonically doubled horizontal-scan rate and a harmonically doubled vertical-scan rate, reading in an interlaced format, with each frame being contiguously read twice in a proper odd-even order as when normally read to generate four fields of video information per frame which may be interlaced.

Abstract: A system and method for imaging and viewing, by a viewer, color and monochrome images as simultaneously three-dimensional and two-dimensional images. The invention comprises a camera device, a viewing device for displaying the images, a transmitter for transmitting a drive signal, and at least one pair of viewing glasses. The camera device includes a single imaging lens having a bifurcated, dual-aperture light valve, and a single image space for receiving and overlaying a plurality of left-eye images and a plurality of right-eye images at a field rate driven by the drive signal. The pair of viewing glasses includes a left-viewing-light valve and a right-viewing-light valve. In response to receiving the drive signal, the left-viewing-light valve opens and closes, synchronized with the field rate, for viewing the plurality of left-eye images.

Abstract: An image-processor system for compensating for accumulated phase-and-gain errors incurred during transmission of a video signal over a communications channel. The image-processor system comprises an initial-video processor, an input-video processor, a feature-video processor, a frame buffer, an RGB-output processor, an output-video processor, and a control processor. The initial-video processor generates a composite video signal. The input-video processor converts the composite video signal into digital-component signal information. The feature-video processor processes the digital-component signal information as processed component video information. The frame buffer re-establishes broadcast timing standards in the processed component video information to generate time-base corrected digital information. The RGB-output processor decodes the time-base corrected digital information into RGB analog and digital outputs. The analog RGB outputs are output directly.

Abstract: An improvement to a motion picture distribution system providing a high quality motion picture system compatible with pre-existing NTSC systems and improving horizontal and vertical detail. The improvement includes a television camera having an anamorphic lens, an encoder coupled to the television camera, and a decoder at a receiver. The anamorphic lens can have an aspect ratio of two to one, and compresses an entire motion picture viewing field into the NTSC-standard, four to three aspect ratio, to produce a horizontally-compressed image. The horizontally-compressed image is output from the television camera as a horizontally-compressed-image signal. The encoder encodes the horizontally-compressed-image signal as a composite-wideband-video signal having increased bandwidth, and generates a subcarrier-composite signal.

Abstract: A system and method for imaging and viewing, by a viewer, color and monochrome three-dimensional and two-dimensional. images for broadcasting in accordance with NTSC, PAL, SECAM, and other world-wide electronic viewing formats. The invention comprises a camera device, a viewing device, a transmitter for transmitting a drive signal, and at least one pair of viewing glasses. The camera device includes a single imaging lens having a multi-aperture light value, and a single image space for receiving and overlaying a plurality of left-eye images and a plurality of right-eye images at a field rate driven by the drive signal. The pair of viewing glasses includes a left-viewing light valve and a right-viewing-light valve. In response to receiving the drive signal, the left-viewing-light valve opens and closes, synchronized with the field rate, for viewing the plurality of left-eye images.

Abstract: A cathode ray tube suitable for use as a visual display includes two or more electron guns. The beams from the electron guns are aligned vertically so that a single horizontal scan of the guns produces two rows of pixels on the front face of the tube. This allows twice as much data to be painted on the display screen without increasing the scan rate of the electron guns. Each of the guns may be a single beam gun, for monochrome displays, or each may be a triple-element gun for RGB displays.

Abstract: A method for imaging, broadcasting and viewing images, simultaneously three-dimensional and two-dimensional, of object space. The invention comprises a camera device, a remote viewing device, a drive signal generator, a transmitter, and a pair of viewing glasses. The camera device includes a single imaging lens having a bifurcated, dual-aperture light valve, and a single image space for receiving and overlaying a plurality of left-eye images and a plurality of right-eye images at a field rate driven by the drive signal. The transmitter transmits the images, as an image signal, and the drive signal. The remote viewing device receives the image signal and reconverts the image signal to the plurality of left-eye images and the plurality of right-eye images. The pair of viewing glasses receives the drive signal and in response thereto, opens and closes the left and right viewing-light valves, synchronized with the field rate, for viewing the left and right eye images, respectively.

Abstract: A video processor, having an input and an output, for compensating for accumulated phase and amplitude errors encountered during transmission of a video signal over a communications channel. The video processor includes a high-pass filter and amplifier, coupled to the input; a post-correction-phase-and-gain restorer; a wide-band-video-delay line coupled to the input; a pre-correction-comb-equalizer restorer; and a combining network, coupled to the output. The high-pass filter has a bandwidth characteristic which is approximately inverse to a low-pass characteristic encountered by the video signal during its transmission over the communications channel. The high-pass filter takes the video signal and outputs a filtered-video signal. The amplifier associated with the high-pass filter inverts the filtered-video signal. The post-correction-phase-and-gain restorer adjusts the inverted-filtered-video signal to generate a restored-video signal.

Abstract: A video processor, having an input and an output, for compensating for accumulated phase and amplitude errors encountered during transmission of a video signal over a communications channel. The video processor includes a high-pass filter and amplifier, coupled to the input; a post-correction-phase-and-gain restorer; a wide-band-video-delay line coupled to the input; a pre-correction-gain restorer; and a combining network, coupled to the output. The high-pass filter has a bandwidth characteristic which is approximately inverse to a low-pass characteristic encountered by the video signal during its transmission over the communications channel. The high-pass filter takes the video signal and outputs a filtered-video signal. The amplifier associated with the high-pass filter inverts the filtered-video signal. The post-correction-phase-and-gain restorer adjusts the inverted-filtered-video signal to generate a restored-video signal.

Abstract: A method of creating motion picture film reduces strobing effect and increases resolution and density. Images are recorded on a first frame of the film from two frames viewed by the camera. These will be superimposed at equal exposure rates. Each frame of the processed film will have double exposures. The procedure may to be performed with photographic film and also with video tape.

Abstract: The information signal for a green camera tube modulated to scan each line in an undulating path is sampled by a filter trap at the frequency of modulation in a narrow band (about .+-.1/2 MHz) and combined with the red and blue camera tube signals in the same proportion that each contributes to the total luminance relative to the green information signal thereby pseudomodulating the red and blue camera tube information signals. Although it is preferable to do this at the camera, thereby having to do it only once for the television transmission system, it may be done at the display tube. This modulation of the green tube scan, and pseudomodulation of the red and blue tube scan not only increases resolution for color television but also eliminated aliasing because the scan of all color camera tubes is effectively undulating so that there can be no scan parallel to horizontal edges of an image that causes aliasing in normal interlaced field of scan lines that are straight horizontal lines.

Abstract: The full potential of high resolution television by synchronized modulation of the scan lines at the camera and display unit is achieved in standard transmission through band limited channels by: separating out of the video signal from the television camera the modulation frequency as sidebands with pixel information, for example 7.16.+-.1/2 MHz in the case of a color subcarrier at 3.58 MHz under the NTSC standards and pixel information modulated on sidebands in a narrow band (about .+-.1/2 MHz); converting the sidebands with pixel information down to within the color subcarrier band (in the range of 3.75 MHz to 4.2 MHz) using a heterodyne converter; and adding back to the video signal out of the camera the down-converted sidebands with pixel information before processing it through the color encoder for transmission through the bandwidth limited channel.

Abstract: Color picture resolution is improved in a color television display system by threshold detecting the luminance signal, and, in response to the threshold detected luminance signal, switching the color signals off when the luminance signal is below a predetermined threshold level. Nonlinear amplifiers which couple the color signals to the display system are provided with gain that decreases as signal amplitude increases to restore color signal pulses to a form commensurate with the luminance signal fast rise and fall times.

Abstract: A method and apparatus are disclosed for increasing vertical resolution of television and eliminating vertical aliasing by modulating vertical deflection of the camera a significant number of cycles per line, and modulating the vertical deflection of the display unit in phase with the modulation of the camera while displaying the video signal transmitted. The display unit is provided with its own modulating oscillator operating at the same stable frequency as the modulating frequency of the camera, and phase synchronized by information transmitted by the camera. In the case of NTSC color television, the vertical deflection modulating oscillator of the camera is the color modulating oscillator, and the vertical deflection modulating oscillator of the receiver is the oscillator used for color demodulation phase synchronized by color bursts gated during blanking periods of each frame.

Abstract: There is disclosed herein a method and system for eliminating or deterring the unauthorized duplication or piracy of video program material, including video tape, cable and broadcast television material. A composite video signal is encoded when recording, or upon broadcast by wire or cable, for preventing unauthorized duplication of the video material and without the need for scramblers and unscramblers. The encoding method allows normal playback of the video material on a conventional television receiver or monitor, but prevents the video material from being effectively re-recorded or duplicated on any of a number of commercially available video recorders by eliminating or distorting the video image upon playback of the re-recording to thereby destroy its commercial value. No decoder or unscrambler is required at the television receiver or monitor for normal playback of the encoded video signals.