Abstract:
The apparent resolution of an image displayed on an image display system is increased without increasing the number of actual pixels which are arranged in horizontal rows and vertical columns and selectively energizable to display an image composed of a plurality of pixel patterns in alternate fields. An optical path changer is positioned between the image display system and a viewer or screen for shifting an optical path therebetween to optically shift the pixel pattern. The optical path changer is operated to shift the optical path, and the pixel pattern to be optically shifted is displayed on the image display system in every field in synchronism with the shifting of the optical path by the optical path changer.
Abstract:
A picture signal recording system comprises a high-definition broadcasting station 1, an artificial satellite 2, a television receiver 3 and a video signal recording apparatus 5. A pilot signal P is superimposed on a luminance signal Y at the broadcasting station 1. This pilot signal P does not give any adverse influence to an image reproduced on a TV monitor and is detectable from the luminance signal Y. A frequency of this pilot signal is selected to be smaller than the frequency of the luminance signal Y, a superimposing timing thereof is set to a head position of the luminance signal Y, and an amplitude thereof is varied with respect to a grey level as a variation center. The pilot signal P superimposed on the luminance signal Y is detected by a pilot signal detecting circuit 53 within a video signal recording apparatus 5. The picture signal is recorded on a video tape 11 and rerecording prohibit information is recorded in a reserved area by a picture signal recording process circuit 51. When the video tape 11 on which this rerecording prohibit information has been recorded is reproduced, the reproduced picture signal is prohibited to be rerecorded.
Abstract:
It is an object of the present invention to provide signals which allow colors in a wider color range than predetermined standards, which can be handled by apparatus according to such predetermined standards. A primary color converter 62 converts first color signals having primary color points in a wider color range than the primary color points according to BT.709 into second color signals based on the primary colors according to BT.709. A photoelectric transducer 63 converts the second color signals into third color signals according to photoelectric transducer characteristics defined in a numerical range wider than a range from 0 to 1.0 of color signals corresponding to a luminance signal and color difference signals according to BT.709. A color signal converter 64 converts the third color signals into a luminance signal and color difference signals. A corrector 64A incorporated in the color signal converter corrects the color difference signals into color difference signals in a range from −0.57 to 0.56 containing a range from −0.5 to 0.5 according to BT.709, which color difference signals are assigned to an integral value in a range from 1 to 254 containing a range from 16 to 240 according to BT.709. The present invention is applicable to a video camera, for example.
Abstract:
Disclosed herein is a display image correcting device including, retaining means configured to retain reference correction amount data for correcting nonuniformity as a predetermined factor of an image displayed on a basis of a video signal, the reference correction amount data representing an amount of correction at a predetermined horizontal and vertical position of the image, the amount of correction being obtained in correspondence with a video signal level as a reference, and correcting means configured to perform correction processing on the video signal in correspondence with a horizontal direction and a vertical direction of the image, and a brightness direction, and performing the correction processing on a basis of three-dimensional correction amount data obtained by making two-dimensional correction amount data corresponding to a horizontal and vertical position, the two-dimensional correction amount data being obtained on a basis of the reference correction amount data, linearly proportional or nonlinearly proportional to level of the video signal to be corrected.
Abstract:
Provided is a projection type liquid crystal display apparatus, which can improve black-level display and thus can display a higher-contrast image as compared to the related art. An optical compensator is located on the light exit side with respect to the liquid crystal display device so as to compensate for the optical phase difference caused by liquid crystal molecules in a light-entry-side region of the liquid crystal layer. As the optical compensator is located on the light exit side with respect to the liquid crystal display device, birefringence, caused by the liquid crystal molecules present in the light-entry-side region, is compensated for without being influenced by a microlenses provided in the liquid crystal plane. Consequently, the apparatus can improve the black-level display and thus can display a higher-contrast image as compared to the related art. Further, a phase difference caused by the birefringence of the nematic liquid crystal molecule is compensated for by using a substance having properties optically opposite to the positive crystal, namely, a substance having birefringence equivalent to birefringence of a negative crystal.
Abstract:
In active driving of liquid crystal panels (R, G, and B) corresponding to R, G, and B color by X shift registers (R, G, and B) and Y shift registers (R, G, and B), alternating-current driving is performed such that signals to be written to the R color and B color liquid crystal panels are opposite in polarity to a signal to be written to the G color liquid crystal panel and also Vcom voltage of each of the liquid crystal panels is adjusted to thereby reduce flicker. The Vcom voltage supplied to the B color liquid crystal panel, for example, is finely adjusted to reduce flicker of a synthetic image of the liquid crystal panels.
Abstract:
To effectively make a mesh of out lines between pixels by a pixel diffusion and at the same time to facilitate a focusing of an image by the observer, an optical filter for diffusing each pixel of a display device into a plurality of parts by utilizing diffraction or refraction is interposed between the display device having an image pattern in a mosaic form and an observer. The optical filter surface performs the pixel diffusion so that a sight angle, of a gap which does not pass light between the neighboring pixel after the pixel diffusion, as viewed from the observer on the focal plane on which the image displayed by the display device is observed by the predetermined observer is substantially a recognizable limit view angle of the observer.
Abstract:
A picture display apparatus is provided with a display device having pixels disposed in a mosaic pattern. A plurality of optical filter surfaces are respectively placed between the display device and a viewer so that both surfaces can be overlapped with each other. Each pixel in the display device is diffracted or refracted by both surfaces to become a plurality of pixels. For each optical filter surface, an element for diffusion such as a diffraction grating and an element for refraction such as a prism can be utilized for the diffraction and refraction.
Abstract:
Apparatus is provided for recording and reproducing video and audio signals on a record medium, wherein the audio signal may be of at least two different types subjected to respectively different types of audio processing. A recording section produces frequency modulated audio signal components and selectively adjusts the level of at least one FM audio signal component during the video blanking intervals as a function of the type of audio signal being modulated. Then, the FM audio signal components and the video signal are combined and recorded. A reproducing section separates the reproduced FM audio signal components from the reproduced video signal and detects the level of at least one separated FM audio signal component during blanking intervals. The FM audio signal components are demodulated and processed pursuant to a selected type of audio processing dependent upon the detected level of the FM audio signal component.
Abstract:
An apparatus reproduces an information signal modulating a carrier signal recorded on a magnetic tape. A portion of the signal being boosted in accordance with a characteristic of the information signal. The apparatus comprises a playback device for reproducing the information signal from the magnetic tape, a detector for detecting the levels of the portion of the signal and the rest of the signal respectively and comparing the levels with each other, and a judging circuit for judging the characteristics of the signal in accordance with the output of the detector.