Abstract: A display apparatus that displays an image by causing a light emitting device to emit light includes a detection unit configured to detect flicker information that indicates a likelihood of occurrence of a flicker based on input image information, and a control unit configured to control both a light emission luminance and a duty ratio of a light emission time of the light emitting device according to the flicker information detected by the detection unit.

Abstract: A display apparatus includes a signal input unit through which an image signal is input, the image signal comprising a synchronization signal and an active signal; an adjustment signal generating unit that generates an adjustment signal; a signal processing unit that receives the adjustment signal and adjusts the image signal based on the received adjustment signal; and a controller which analyzes the input signal and controls the adjustment signal generating unit to change characteristics of the adjustment signal if the adjustment signal does not lie within a blanking interval between the synchronization signal and the active signal. With this configuration, even when an image signal having a reduced blanking interval between the synchronization signal and the active signal is input, the adjustment signal can be generated within the blanking interval of the image signal, not within the active signal interval.

Abstract: A brightness converting unit obtains brightness of each of the pixels. The low-resolution brightness image generating unit divides an image based on the input image signal into a plurality of domains, and obtains an average brightness of each of the domains, on the basis of the brightness obtained by the brightness converting unit. A high-resolution brightness image generating unit obtains brightness of each of the pixels included in the image based on the input image signal by weighting the average brightness obtained for each of the domains by a distance from a central portion of the domain. On the basis of the obtained brightness, the corrected gain lookup table determines a corrected gain, and the correcting unit corrects the input image signal.

Abstract: A dynamic gain adjustment method and apparatus based on brightness are provided. The dynamic gain adjustment method and apparatus amplify or attenuate high frequency components of an input video signal by dynamically varying a gain that is applied to a peaking algorithm block for picture quality improvement in a video processing device, such as a digital television, based on an average picture level (APL) of the input video signal. The gain can be dynamically adjusted when the APL of the input video signal is high or low, and thus saturation of the video signal during the operation of the peaking block can be prevented.

Abstract: A video processor includes a video filter and a calculation circuit. The video filter performs a low-pass filtering operation on first frame data to obtain brightness distribution data. The calculation circuit obtains difference data between the brightness distribution data and second frame data. The calculation circuit multiplies the difference data and a weighting parameter together to obtain a product, and then summates the product and the second frame data together to generate processed frame data.

Abstract: TV settings such as brightness can be established by sending from a TV signals from an ambient light sensor to a network server, with the network server establishing settings such as brightness in response for a program being played on the TV.

Abstract: A video, audio and graphics system uses multiple transport processors to receive in-band and out-of-band MPEG Transport streams, to perform PID and section filtering as well as DVB and DES decryption and to de-multiplex them. The system processes the PES into digital audio, MPEG video and message data. The system is capable of decoding multiple MPEG SLICEs concurrently. Graphics windows are blended in parallel, and blended with video using alpha blending. During graphics processing, a single-port SRAM is used equivalently as a dual-port SRAM. The video may include both analog video, e.g., NTSC/PAL/SECAM/S-video, and digital video, e.g., MPEG-2 video in SDTV or HDTV format. The system has a reduced memory mode in which video images are reduced in half in horizontal direction only during decoding. The system is capable of receiving and processing digital audio signals such as MPEG Layer 1 and Layer 2 audio and Dolby AC-3 audio, as well as PCM audio signals. The system includes a memory controller.

Abstract: Provided are an apparatus and method for automatically adjusting luminance, and more particularly, apparatus and method for automatically adjusting luminance per region in plurality of luminance regions of an image to be displayed according to its average luminance value. An average luminance of an image is detected, and then contrast and brightness of image is automatically adjusted according to detected average luminance. Amplification of contrast and brightness is increased to brighten an image in an image with low luminance and reduced to suppress image dazzle in an image with high luminance, thereby providing user with an image of appropriate brightness, irrespective of original brightness. It is possible to prevent diversion of image by dividing its luminance level into a plurality of regions and controlling contrast and luminance per region. Further, a buffer region between luminance regions prevents flickering of image on a screen due to diversion of an adjustable gain.

Abstract: A video, audio and graphics system uses multiple transport processors to receive in-band and out-of-band MPEG Transport streams, to perform PID and section filtering as well as DVB and DES decryption and to de-multiplex them. The system processes the PES into digital audio, MPEG video and message data. The system is capable of decoding multiple MPEG SLICEs concurrently. Graphics windows are blended in parallel, and blended with video using alpha blending. During graphics processing, a single-port SRAM is used equivalently as a dual-port SRAM. The video may include both analog video, e.g., NTSC/PAL/SECAM/S-video, and digital video, e.g., MPEG-2 video in SDTV or HDTV format. The system has a reduced memory mode in which video images are reduced in half in horizontal direction only during decoding. The system is capable of receiving and processing digital audio signals such as MPEG Layer 1 and Layer 2 audio and Dolby AC-3 audio, as well as PCM audio signals. The system includes a memory controller.

Abstract: A brightness adjusting method for video frames of a video sequence includes receiving a current video frame of the video sequence and performing a scene change detection to determine if a scene change occurs between the current video frame and a previous video frame. Thereafter, one of a plurality of candidate brightness adjusting schemes is applied to the current video frame according to a scene change detection result.

Abstract: A field delay circuit aligns the phases of two field signals. An average value calculation circuit generates an average value signal of the two field signals. This average value signal can be regarded as a signal that has undergone a one-dimensional low-pass filter process in the row direction in which the number of taps for a progressive signal is 2 and the filter coefficient for each tap is 0.5 and that has then been thinned to one-half the data. A two-dimensional LPF circuit subjects this average value signal to a low-pass filter process and eliminates the high-frequency components (edge components). A subtraction circuit subtracts the average value signal that has undergone the LPF process from each field signal and thus extracts the edge components of each field signal. An amplification circuit multiplies the edge components of each field signal by a prescribed factor. An addition circuit adds the resulting amplified edge components to each field signal.

Abstract: A computer assisted method identifies characteristics of a flare. A digital image of the flare is obtained, such as by a color digital video camera and a region of interest likely containing the flare is identified. Flare pixels within the region of interest are identified and color information is extracted from such flare pixels.

Abstract: In an image display device, how R, G, and B light is emitted to display an image on a display panel is measured with a sensor, and, according to the measurement value obtained from the sensor, the power with which to drive a light source that supplies light needed for the display operation of the display panel is varied so that the brightness or chromaticity of the display panel is corrected.

Abstract: A picture quality improvement device has two-dimensional low-pass filter that takes as input a luminance signal YIN that is obtained from a video signal and that extracts low-pass components for a vertical direction and a horizontal direction of the input luminance signal YIN. The picture quality improvement device adds an edge signal, which is obtained by subtracting from luminance signal YIN the low-pass extraction signal (LPF) that has been extracted by two-dimensional low-pass filter, to luminance signal YIN. Two-dimensional low-pass filter is constituted such that the extraction gain of the vertical direction low-pass component and the extraction gain of the horizontal direction low-pass component are independently adjusted.

Abstract: A method for compensating a digital image for the effects of flare light in order to generate an enhanced digital image operates upon a source digital image derived from an original scene affected by imaged flare light, wherein the source digital image includes a plurality of pixels with a known relationship to the intensity of light corresponding to the original scene. A first flare control parameter relating to the intensity of imaged flare light and a second flare control parameter relating to the average intensity level of imaged light in the original scene are derived from the source digital image, and a flare compensation function is calculated using the first and second flare control parameters. An enhanced digital image is then generated from the flare compensation function and the source digital image.

Abstract: A brightness correcting circuit and method for efficiently correcting the brightness of the edges and the corners of a monitor screen are provided. The circuit for correcting the brightness of the monitor screen which operates according to the brightness correcting method includes a parabolic signal generator for generating a parabolic signal and a corrected video signal generator for controlling the gain of an input video signal in response to the parabolic signal and outputting a corrected video signal.

Abstract: A brightness control apparatus for a video display appliance which keeps the brightness of the picture uniformly over the whole screen by determining the amplification rate of the video signal to be displayed at the corners of the screen relatively higher than that to be displayed at its center.

Abstract: An apparatus for automatically stabilizing the black level of a displayed picture when (1) an automatic black level stabilizing function is OFF, (2) black level error occurs between at an ON state and at an OFF state and (3) black level variation and picture disturbance occurs during activation and deactivation of the automatic black level stabilizer. Black level variations when the automatic black level stabilizer are OFF is controlled by processing a cathode current in a negative feedback loop and controlling a CRT grid voltage, storing a divided grid voltage during a converging period and processing the grid voltage in another negative feedback loop in order to adjust the grid voltage to an ON state value.

Abstract: A television picture image processing apparatus includes a horizontal edge gate pulse generator, a vertical edge gate pulse generator, an AND combiner for ANDing horizontal and vertical edge gate pulses applied thereto respectively from the horizontal and the vertical edge gate pulse generators, a sawtooth pulse generator, an amplifier for controlling the gain of sawtooth pulses from the sawtooth pulse generator in accordance with an external DC voltage, and a luminance processor. The apparatus prevents picture quality of a television set from being degraded due to a poor contrast and brightness occurring in each corner of a television picture screen.

Abstract: In an image pick up device, signal level of red, green and blue color signals is coarsely adjusted in a signal processing circuit, and then a black level of video signal is finely adjusted in a digital signal processing circuit, thereby being capable of easily adjusting the black level and improving the accuracy of black level adjustment.

Abstract: An image transmission apparatus indicating a color type of the color signal transmitted includes circuitry for separating color image information into a plurality of color signals and transmitting the plurality of color signals. An indication device is provided for, in response to the transmission of the plurality of color signals from the transmitting circuitry, indicating which of the plurality of color signals is transmitted. The indication may include an indication of one of a R G or B signal or an indication of a monochromatic or multi-chromatic transmission.