| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 348663000 | Chrominance-luminance signal separation | 31 |
| 20080252790 | Delay Circuit and Video Signal Processing Circuit Using the Same - A delay circuit is disclosed. A switched-capacitor group includes a plurality of switched-capacitor units, each of which have a switching element and a capacitive element charged/discharged by turning on/off the switching element. The switched-capacitor units are connected such that the input signal is input in common to all of the switched-capacitor units and the capacitive elements are charged as well such that the capacitive elements are discharged to allow the output signal to be output from the switched-capacitor units. A switching control unit performs on/off control of the switching elements to cause the capacitive elements to be charged in sequence based on the input signal, causing the capacitive element charged last time to be discharged to allow the output signal to be output in sequence from the switched-capacitor units, and performs control of all of the switching elements to be turned off upon on/off switching of the switching elements. | 10-16-2008 |
| 20090046207 | Multi-compatible low and high dynamic range and high bit-depth texture and video encoding system - A method of processing image data includes generating image data including luminance and chrominance data representing a selected object, separating the luminance and chrominance data, storing the separated luminance and chrominance data in corresponding separate spaces in memory, and separately compressing the stored luminance and chrominance data. | 02-19-2009 |
| 20090147142 | Flash detection - There is provided a method of pre-processing video data to detect flashes, comprising calculating a normalized difference index value for a Luminance M component of the video data, calculating a normalized difference index value for Chrominance [U and V] components of the video data, calculating a normalized luminance [Y] mean gradient index for the video data, and providing an indication that a flash has been detected when all the following conditions are satisfied: the normalized difference index value for the Luminance [Y] component is greater than a first predetermined threshold (T | 06-11-2009 |
| 20090161019 | Method and apparatus for removing color noise of image signal - A method and apparatus remove color noise of an image signal in which a distortion of a YCbCr color space caused by noise is corrected using correlations between color channels in the YCbCr color space of low frequency (LF) and high frequency (HF) components of an image signal while maintaining the HF component. The apparatus includes: a separator separating the image signal including a luminance signal and a chrominance signal into an LF component and an HF component; an LF noise remover removing noise of the LF component from the image signal; an HF noise remover applying a linear variation rate of the chrominance signal with regard to the luminance signal of the noiseless LF component to the HF component separated from the image signal and generating a new HF component; and a combiner combining the noiseless LF component and the new HF component. | 06-25-2009 |
| 20090180030 | METHOD AND SYSTEM FOR SHARPENING THE LUMA AND THE CHROMA SIGNALS - A video processing system may be operable to utilize multi-band sharpening to process luma signals for image signals. The luma signal may be decomposed into a plurality of frequency band components, wherein each component may be processed separately using different sharpening gains and/or offsets. The multi-band processed components may be combined to generate sharpened output luma signals. The multi-band sharpening may be performed utilizing peaking processing, and the input luma signal and/or LTI sharpened luma signals may be combined with the multi-band peaking sharpened signals to generate the sharpened output luma signals. Corresponding chroma signals may also be adjusted to generate sharpened output chroma signals. Luma and/or chroma sharpening operations may be further adjusted based on coring, clipping avoidance, luma statistics, color region detections, and/or curve control parameters. Sharpened output image signals may be generated based on the sharpened output luma signals and the sharpened output chroma signals. | 07-16-2009 |
| 20100039563 | Demosaicking Single-Sensor Camera Raw Data - An image processing method that demosaicks a mosaic input image of R, G, and B components to generate a full color output image. The image processing method calculates both vertical and horizontal luminance-chrominance difference components for each pixel of the mosaic input image. Next, the image processing method calculates an enhanced version of both the vertical and horizontal luminance-chrominance difference components for each pixel of the mosaic input image. Next, the image processing method evaluates the variations in the enhanced luminance-chrominance difference components in order to create an edge directional map indicating the direction in which demosaicking should be performed. Then, the image processing method interpolates a G component for each of the pixels with the original R and B components using the edge directional map. Next, the image processing method interpolates an R component for each of the pixels with the original G and B components and a B component for each of the pixels with the original R and G components. Finally, the image processing method enhances the interpolated R and B components using the edge directional map. | 02-18-2010 |
| 20100060796 | Color reconstruction system and method for a secam television signal - A color reconstruction system for an SECAM television signal includes a luminance and chrominance separator and color decoder, first and secons line buffer blocks, a vertical similarity calculator and a reconstructor. The luminance and chrominance separator and color decoder receives and filters an SECAM television signal with a luminance and a chrominance to produce a luminance signal and a chrominance signal. The first line buffer block temporarily stores the luminance signal. The second line buffer block temporarily stores the color difference signal. The vertical similarity calculator produces an upper similarity coefficient and a lower similarity coefficient based on the luminance signals produced by the luminance and chrominance separator and color decoder and temporarily stored in the first line buffer block respectively. The reconstructor depends on the upper and lower similarity coefficients to adjust the chrominance signal temporarily stored in the second line buffer block to produce a reconstructed chrominance signal. | 03-11-2010 |
| 20100220238 | CROSS-COLOR/DOT INTERFERENCE REDUCTION CIRCUIT, IMAGING APPARATUS HAVING CROSS-COLOR/DOT INTERFERENCE FUNCTION, AND CROSS-COLOR/DOT INTERFERENCE REDUCTION METHOD - A cross-color/dot interference reduction circuit according to one embodiment of the present invention includes a signal generation unit configured to calculate a difference in an input signal between adjacent frames and generate a difference signal, a component extraction unit configured to extract a cross-color/dot interference component from the difference signal, a combination output unit configured to combine an interference reduction signal corresponding to the cross-color/dot interference-component with the input signal and provide an output signal with a reduced cross-color/dot interference, an image scene analysis unit configured to analyze an image scene contained in the input signal, and a signal amplification/attenuation unit configured to amplify/attenuate the interference reduction signal based on an image scene analysis result from the image scene analysis unit. In this circuit, increased or decreased the reduction effect of the cross-color/dot interference is increased or decreased depending on a content of the image scene. | 09-02-2010 |
| 20100231800 | DISPLAY OF VIDEO WITH MOTION - A method of displaying a video of a scene on a display with reduced motion blur includes: providing the video of a scene having first subframes that have a first input rate and second subframes that have a second input rate, wherein the first subframes correspond to a first region of the display and the second subframes correspond to a second region of the display; and selectively providing the first and second subframes to corresponding regions in the display, and providing the first region of the display with a first update rate and the second region of the display with a second update rate, wherein the first update rate is greater than the second update rate, so that the displayed image has reduced motion blur. | 09-16-2010 |
| 20100309380 | Method and apparatus for providing and reducing dynamic chroma copy protection effects by modifying luminance copy protection signals - Chroma copy protection signals are provided or synthesized for component or composite video signals by modifying one or more luminance copy protection signal. The system takes advantage of the characteristics of component video signals, wherein the luminance signal (channel) generally is subject to automatic gain control while the chrominance signal (channel) is decoupled from the luminance signal in automatic gain control (AGC) systems of a video recorder. Accordingly, when a copy protection signal is applied to the luminance signal but does not affect the chrominance signal, a video recorder will output a signal with an attenuated luminance signal and a full amplitude chrominance signal. This causes erroneous color saturation effects. An alternative embodiment provides method and apparatus for reducing or defeating chroma copy protection effects such as disclosed herein. | 12-09-2010 |
| 20110063517 | Method And System For Utilizing Non-Local Means (NLM) For Separation Of Luma (Y) And Chroma (CBCR) Components - One or more processors and/or circuits receive a composite video signal and determine a current pixel and a plurality of reference pixels. A plurality of weighting factors corresponding to the reference pixels are determined utilizing non-local means. Chroma components and/or luma components for the current pixel are determined based on weighted least squares utilizing the reference pixels, the weighting factors and information known about the composite signal, for example, sub carrier information. The composite video signal may comprise baseband Y and modulated Cb and/or Cr components. Weighting factors are determined by comparing a block of pixels about the current pixel with a block of pixels about the corresponding reference pixels in a current, previous or future frame. A set of equations comprising reference pixel data, a set of weighting factors and/or the known information may be solved to the determine signal components. | 03-17-2011 |
| 20110075040 | System and method for improved composite decoding - A method of composite decoding in which the input signal is converted into the frequency domain, and the symmetry of frequency components with respect to the subcarrier frequency is compared. The comparison is varied in dependence upon the frequency being processed. In this way, the separation can be adapted to suit known characteristics of different portions on the input spectrum. This is particularly useful for processing NTSC signals. The allocation of a particular component to chrominance may be biased in dependence upon a measure of the luminance information of the composite signal at a corresponding spatial frequency. | 03-31-2011 |
| 20110273622 | METHOD AND SYSTEM FOR CHROMA PARTITIONING AND RATE ADAPTATION FOR UNCOMPRESSED VIDEO TRANSMISSION IN WIRELESS NETWORKS - A method and system for transmission of video information is provided. A transmitting wireless station performs chroma partitioning of pixels in a video frame into different partitions. The chroma partitioning includes separating luminance (Y) information from chrominance information (C | 11-10-2011 |
| 20150070589 | VIDEO SIGNAL TRANSMISSION METHOD, DEVICE, SYSTEM AND TERMINAL - The invention relates to the art of communications and particularly to a video signal transmission method, apparatus, system and terminal, where the method includes: separating a current raw digital video signal acquired by a video camera core into a luminance signal and a chrominance signal; converting the luminance signal and the chrominance signal into an analog video signal; transmitting the analog video signal to a master control chip board through an electrically-conductive slip ring; and converting the analog video signal back into the current raw digital video signal in the master control chip board. With the video signal transmission method, apparatus, system and terminal according to embodiments of the invention, the integrity of the transmitted video signal can be improved to thereby guarantee the quality of the video signal. | 03-12-2015 |
| 348665000 | Including comb filter (e.g., using line, field, frame delays) | 17 |
| 20090033799 | VIDEO PROCESSING METHOD AND VIDEO PROCESSING APPARATUS USING THE SAME - A video processing method and a video processing apparatus employing the same are provided. The video processing apparatus measures an amount of noise included in an incoming composite video signal, and outputs 2D comb filtered signal and 3D comb filtered signal in different proportions according to the measured amount of noise. By varying the proportions of the 2D comb filtered signal and 3D comb filtered signal according to the measured amount of noise, video artifacts associated with 2D and 3D comb filtering are compensated and improved. | 02-05-2009 |
| 20090040388 | SIGNAL PROCESSING APPARATUS AND CONTROL METHOD THEREOF - A signal processing apparatus and a control method thereof are provided. The signal processing apparatus includes: a comb filter which divides a luminance signal and a chrominance signal from an input video signal and outputs a luminance level of the luminance signal and a color level of the chrominance signal; an output unit which outputs one of the luminance level output by the comb filter and a blurred luminance level obtained by blurring the luminance level; and a controller which determines whether the luminance level output by the comb filter includes the color level, and controls the output unit to output the blurred luminance level if the color level is included in the luminance level, and output the luminance level if the color level is not included therein. | 02-12-2009 |
| 20090295999 | System of edge direction detection for comb filter - A system of edge direction detection for comb filter includes a buffer, first and second filters, first and second oblique detectors, and a comparator. The buffer receives and stores a composite signal. The first filter performs filtering operation on the composite signal to produce a first filter signal. The second filter performs filtering operation on the composite signal to produce a second filter signal. The first oblique detector detects an oblique in the first filter signal to produce a first oblique indication signal and a first oblique direction signal and output a first minimum oblique difference. The second oblique detector detects an oblique in the second filter signal to produce a second oblique indication signal and a second oblique direction signal and output a second minimum oblique difference. The comparator compares the first and second oblique indication signals and the first and second oblique direction signals to produce edge information. | 12-03-2009 |
| 20090303390 | Method for separating luminance and chrominance of composite TV analog signal - A method for separating luminance and chrominance of a composite TV analog signal includes the steps of: measuring first differences between horizontal neighbor pixels, second differences between vertical neighbor pixels and third differences between temporal neighbor pixels encoded in the composite TV analog signal; comparing the first, second and third differences with one another to obtain a minimum difference used as a factor of a weighting function; and filtering the composite TV analog signal simultaneously by a two-dimensional (2D) comb filter and a three-dimensional (3D) comb filter according to the weighting function on the basis of the minimum difference to obtain a luminance signal and a chrominance signal, in which magnitudes of a part of the composite TV analog signal filtered by the 2D comb filter and magnitudes of the other part of the composite TV analog signal filtered by the 3D comb filter are determined by the weighting function. | 12-10-2009 |
| 20090322954 | DYNAMIC SELECTION OF 3D COMB FILTER BASED ON MOTION - A narrower bandwidth 3D comb filter is used to render a still motion portion of a video frame if motion in a moving portion of the frame exceeds a threshold, and otherwise a wider bandwidth 3D comb filter is used to render the still motion portion. | 12-31-2009 |
| 20100165209 | System and method for phase motion detection for YC separation - A system, apparatus and method are disclosed for separating a current frame of a composite video signal into a luminance signal and a chroma signal. A relative chroma correlation value is generated using a plurality of lines of the current frame. A weighted sum of inter-line pixel differences of the current frame is generated using the relative chroma correlation value. A frame difference signal is generated by subtracting a previous frame of the composite video signal from the current frame. A detected motion signal is generated that corresponds to motion detected in the current frame. The weighted sum of inter-line pixel differences, the frame difference signal, and the detected motion signal are combined to generate the chroma signal. The chroma signal is subtracted from the current frame to generate the luminance signal. | 07-01-2010 |
| 20100225821 | IMAGE PROCESSING APPARATUS AND CONTROL METHOD THEREOF - An image processing apparatus is provided, including: a first image processing unit which converts an input image signal into a brightness signal and a chromaticity signal; and a second image processing unit which adjusts a bandwidth used to filter the chromaticity signal to correspond to a noise level of the image signal, and filters the chromaticity signal with the adjusted bandwidth to extract a chrominance signal. | 09-09-2010 |
| 20110075041 | Method and System for a Generalized Multi-Dimensional Filter Device - Aspects of a method and system for a generalized multi-dimensional filter device are provided. A corresponding luma component and a corresponding chroma component of a sample of a composite video baseband signal for each of a plurality of filtering modes may be determined. A similarity level of the sample corresponding to each of the plurality of filtering modes may be determined. A corresponding coefficient for each of the plurality of filtering modes may be generated based on the determined similarity levels. A luma component and a chroma component of the sample of the composite video baseband signal may be generated based on the generated corresponding coefficients and the determined corresponding luma components and the determined corresponding chroma components for each of the plurality of filtering modes. | 03-31-2011 |
| 20110221966 | Super-Resolution Method for Image Display - The present invention discloses a super-resolution method for image display. The method comprises: receiving a low resolution image; dividing the low resolution image into a plurality of regions; finding high resolution patches in a pre-trained database; pasting the high resolution patches back to the plurality of regions by puzzle-form process or oblique-form process and computing the compatibility utilizing a two-dimensional hidden Markov model process; and generating a super-resolution image. | 09-15-2011 |
| 20130155328 | Multi-Directional Comb Filtering in a Digital Video Decoder - A multi-directional comb filtering in a digital video decoder is provided. Some embodiments of the present invention provide for a method of filtering, using a multi-directional comb filter, pixel data from a sequence of fields of pixel data, wherein the fields of pixel data comprise a previous field, a current field and a next field, and wherein each of said fields includes a previous line, a current line, a next line. | 06-20-2013 |
| 348666000 | Including adaptive artifacts removal (e.g., switchable trap or LPF in luma channel) | 2 |
| 20090237568 | Decoder and Method for Separating Luminance and Chrominance Information from a Composite Video Signal - A decoder and a method for separating luminance and chrominance information from a target pixel in a composite video signal are provided. The decoder comprises a delay module, a filter module, a weighting factor generator, and a separator. The delay module is configured to delay a plurality of horizontal lines of the composite video signal to output a plurality of pixels including the target pixel. The filter module is coupled to the delay module and configured to filter the composite video signal in a horizontal direction and a vertical direction to generate a plurality of frequency components. The weighting factor generator is configured to generate a first weighting factor of the target pixel according to the horizontal direction and a second weighting factor of the target pixel according to the vertical direction. The separator is configured to separate luminance information from the target pixel in accordance with the frequency components, the first weighting factor, and the second weighting factor. | 09-24-2009 |
| 20090278990 | ERROR DETECTION METHOD AND CIRCUIT, AND ERROR REDUCTION METHOD AND CIRCUIT - An error reduction apparatus includes a combing absence detector to detect absence of combing from a luminance signal, a combing presence detector to detect presence of combing from a color-difference signal, a vertical low-pass filter to receive the color-difference signal, and a selector to select one of the color-difference signal and a color-difference signal to which the vertical low-pass filter is applied based on detection results of the combing absence detector and the combing presence detector, and if combing is absent in the luminance signal and combing is present in the color-difference signal, the error reduction apparatus applies the vertical low-pass filter to the color-difference signal and outputs the signal. | 11-12-2009 |
| 348667000 | Adaptive comb filter | 5 |
| 20100045871 | VIDEO LUMINANCE CHROMINANCE SEPARATION - The invention provides techniques for separating luma and chroma signal components in a composite SECAM video signal. During reception, the SECAM video signal is split into luma and chroma output. The amplitude of the chroma carrier is monitored during reception. If the chroma carrier amplitude is greater than a threshold, the value of the chroma output can be reduced. Also, if the chroma carrier amplitude is greater than another threshold, a portion of the chroma carrier can be added to the luma; or the trap band of the band-trap filter for extracting luma from the composite video can be reduced. The respective amount of the reduction in the chroma output and the increase in the luma output are independently determined but both may proportional to the magnitude of the deviation in the chroma carrier amplitude from the different thresholds. | 02-25-2010 |
| 20130113998 | DEVICE FOR OUTPUTTING LUMINANCE SIGNAL - A device for outputting a luminance signal is disclosed. The device includes a chrominance judgment unit, a field observation unit, and an output unit. The chrominance judgment unit and the field observation unit are used to determine whether a 3D luminance signal is affected. The output unit outputs a resultant luminance signal according to the determination results of the chrominance judgment unit and the field observation unit. According to the present invention, the resultant luminance signal can be accurately obtained by judging characteristics of the 3D luminance signal and a 3D chrominance signal even if a 3D comb filter is wrongly used in a motion condition. | 05-09-2013 |
| 348668000 | Selects or blends two or more separated signals to derive output | 3 |
| 20090073319 | Method and System for Processing Chroma Signals - Methods and systems for processing chroma signals are disclosed. Aspects of one method may include compensating a modulated chroma signal for distortions due to audio trap filtering. The compensated chroma signal may be demodulated to generate U and V chroma signals. The U and V chroma signals may be low pass filtered, and then YC aligned. YC alignment may comprise correcting portions of the U and V chroma signals based on the luma signal. The correction may be based on, for example, correlation between the U and V chroma signals and the Y luma signal, and/or energy level of the Y luma signal. The corrected U and V chroma signals may be chroma sharpened, where a gain parameter may be changed to change a transition slope for the U and V chroma signals. The chroma sharpened signals may also be clamped to reduce overshoot and undershoot. | 03-19-2009 |
| 348669000 | Including frame or field delays (e.g., motion adaptive) | 2 |
| 20110075042 | Method and System for Advanced Motion Detection and Decision Mechanism for a Comb Filter in an Analog Video Decoder - Aspects of a method and system for an advanced motion detection and decision mechanism for a comb filter in an analog video decoder are provided. A spatial luma component and a spatial chroma component of a current pixel of a composite video baseband signal may be determined by a spatial comb filter. A temporal luma component and a temporal chroma component of the current pixel of the composite video baseband signal may be determined by one or more temporal comb filters. A motion level of the current pixel may be generated based on one or more video characteristics. A luma component and a chroma component of the current pixel of the composite video baseband signal may be generated based on the generated motion level and determined spatial luma component, spatial chroma component, temporal luma component, and temporal chroma component of the current pixel of the composite video baseband signal. | 03-31-2011 |
| 20130250178 | PHASE MOTION DETECTOR FOR BASEBAND YC SEPARATION - Systems and methods are disclosed herein for a motion detection system for video signal processing that includes a luminance motion detector, a chroma motion detector, and a smoothness detector. These systems and methods may also include a phase motion detector, a baseband YC separation circuitry for video signal processing, a chip for video signal processing, and a video signal processing system used in an electronic article. | 09-26-2013 |
