Abstract: Color correction is performed on a first set of three pixel values by determining a color phase of the pixel values. The determined color phase is used to determine a phase difference, and the phase difference is used to control an amount of color phase rotation applied to the chrominance pixel values of the first set. The color phase is also used to determine a first gain, and the first gain is used to control a scaling of the rotated chrominance pixel values, thereby generating color corrected chrominance pixel values. The color phase is also used to determine a second gain, and the second gain is used to control an amount of scaling applied to the luminance pixel value of the first set, thereby generating the color corrected luminance pixel value. How color phase determines phase difference, the first gain and the second gain is changed depending on lighting conditions.

Abstract: In a color separation circuit, a camera comprising such a color separation circuit and a color separation method, an adapted luminance signal is recovered from an image sensor signal using an adaptive wide band filter, wherein the adaptive wide band filter is controlled by the amount of a diagonal energy in the image sensor signal.

Abstract: Provided are method and apparatus of pre-processing in WDR (wide dynamic range) image processing, the method of pre-processing of WDR image processing including: (a) receiving luminance and chrominance signals having different exposure times, and analyzing the correlation between a luminance signal having a first exposure time and a luminance signal having a second exposure time that is longer than the first exposure time; (b) based on the result of the analysis, dividing each of the luminance signal having the first exposure time and the luminance signal having the second exposure signal, into at least one of a bright region, a transition region, and a dark region; and (c) normalizing the regions of the luminance signal having the first exposure time to respectively correspond to the regions of the luminance signal having the second exposure times.

Abstract: A digital video signal processing apparatus and method for frame-based adaptive spatio-temporal Y/C separation. In the digital video signal processing apparatus, an adaptive three-dimensional bandpass filter (3D BPF) performs Y/C separation using local comb filtering/1D band pass filtering/frame comb filtering when the edge direction is fixed vertically/horizontally/temporally according to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally/vertically/temporally, the 3D BPF performs 2D or 3D band pass filtering in all directions. Thus, the 3D BPF continuously carries out comb filtering, 1D band pass filtering, frame comb filtering and 2D/3D band pass filtering according to the spatio-temporal local characteristic of the image.

Abstract: 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.

Abstract: A video-signal-processing device configured to externally transmit at least one brightness signal and at least one color-difference signal is provided. A single frame of the color-difference signal is assigned to a plurality of frames of the brightness signal so that a first frame frequency of the color-difference signal is lower than a second frame frequency of the brightness signal, where the first frame frequency is 24 Hz or higher. The brightness signal and the color-difference signal are transmitted so that a first center value on a first time base generated by the single frame of the color-difference signal becomes closest to a second center value on a second time base generated by the plurality of frames of the brightness signal corresponding to the color-difference signal.

Abstract: 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.

Abstract: An image processing circuit for processing a video signal includes: a separator for separating the video signal into a brightness signal and a color signal; a first filter coupled to the separator for filtering the color signal; and a second filter coupled to the separator for filtering the brightness signal.

Abstract: 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 (TY); the normalized difference index value for the Chrominance [U and V] components is less than a second predetermined threshold (TC); and a difference between the normalized difference index value for the Chrominance [U and V] components and the normalized luminance [Y] mean gradient index is less than or equal to a third pre-determined threshold (TF).

Abstract: The present invention uses a 2D comb filter 20 to output a 2D chrominance signal C2d by comparing the current scan-line signals with the signals before and after the current scan-line signals. A 3D chrominance signal C3d is then acquired by directly subtracting two adjacent 2D image signals and then dividing by 2 to get an approximate chrominance signal C3d of the two 2D images. Ratio mixing is performed on the 2D chrominance signal C2d and the 3D chrominance signal C3d to output a near-actual chrominance signal. A chrominance variation value can be acquired by comparing the chrominance signals of the two adjacent images. Finally, an actual luminance signal of the current scan-line is separated by deducting the near-actual chrominance signal from the signals of the current scan-line to restore the luminance signal.

Abstract: A method of separating a chroma data component from a video data stream includes determining a phase relationship between a color burst in digital video data samples of a composite video signal and a local clock signal which processes the digital video data samples. In response to determining the phase relationship, interpolation filtering is performed on the digital video data samples corresponding to first and second display lines to generate phase aligned video data samples. Adaptive filtering is then performed utilizing the phase aligned video data samples corresponding to the first and second display lines to separate the chroma component from the digital video data samples corresponding to the first display line.

Abstract: I describe and claim a temporal comb filtering system and method. The temporal comb filter system includes a comb filter to temporally process separated luminance and chrominance components from an image field responsive to image data from at least one other image field and a panel to display the processed components. The comb filter includes a cross-chroma detector to detect luminance information within chrominance data from a first image field responsive to chrominance data from at least one other image field and a cross-luma detector to detect chrominance information within the luminance data from the first image field responsive to the luminance data from at least one other image field.

Abstract: The motion detection device includes an oblique correlation detection section, a motion detection section and a motion determination section. The oblique correlation detection section detects a correlation in an oblique direction (oblique correlation) of a composite video signal. The motion detection section detects a motion amount based on an inter-frame difference of the composite video signal. The motion determination section determines the presence/absence of a motion in the composite video signal based on the motion amount detected by the motion detection section. The motion determination section determines the presence/absence of the motion considering the detection results of the oblique correlation by the oblique correlation detection section.

Abstract: A video signal processing circuit that uses a prescribed clock signal to process a digitized composite video signal. A clock generating means (2) generates the prescribed clock signal; a burst phase detecting means (3) detects color subcarrier phase information (p) in each line of the composite video signal; a phase difference calculation means (4) finds the phase difference between phase information (p) from the burst phase detecting means and a prescribed reference phase; a sampling phase conversion means (8) corrects the sampling phase of the composite video signal according to phase corrections (?b, ?t) obtained from the phase difference calculation means (4); a Y/C separation means (9) separates the luminance and chrominance signals from the composite video signal output from the sampling phase conversion means (8). Excellent two- or three-dimensional Y/C separation can be obtained regardless of the television broadcast system, even from a non-standard signal.

Abstract: A control of gobos defend by records in the gobo. The gobos are formed by menued shapes.

Abstract: 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.

Abstract: Methods and systems for data compression for storage of 3D comb filter data are disclosed. An incoming video signal may be band-limited during combing, where the incoming video signal may comprise a plurality of active and inactive video samples disposed within a plurality of video lines. The active video samples disposed within at least a portion of the plurality of video lines may be stored. The incoming video signal may be band-limited to 6.75 MHz, for example. Video samples utilized for eliminating edge effects may be stored. The number of video samples utilized for eliminating edge effects may be associated with an upsampling filter tap count. The active video samples may be combed. At least a portion of the plurality of video lines may be stored. The portion of the plurality of video lines may comprise active video lines.

Abstract: A video processing circuit capable of processing a composite signal and a non-composite signal, includes: a line buffer; a frame buffer; a video decoder for decoding the composite signal by utilizing the line buffer and the frame buffer as temporary buffers of the video decoder; a cross color suppressor for performing color suppression on the non-composite signal by utilizing the line buffer and the frame buffer as temporary buffers of the cross color suppressor; and a path controller, coupled to the video decoder and the cross color suppressor, for coupling the line buffer and the frame buffer to the video decoder or the cross color suppressor when utilizing the line buffer and the frame buffer is required.

Abstract: 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.

Abstract: A Y/C separation circuit according to the present invention includes: a pattern determination section in which video signals “a”, “b”, and “c” of three lines from which a frequency band of a chrominance subcarrier is extracted through BPFs to determine whether an addition/subtraction result of (b?a), (b+a), (b?c), (b+c), (c?a), and (c+a) is positive or negative, thereby determining relations in amplitude and phase between the video signals “a”, “b”, and “c”; and a filtering section in which one of plural filtering operations for separating a chrominance signal is selected in accordance with the determination result sent from the pattern determination section to output a chrominance signal through the selected filtering operation.

Abstract: 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.

Abstract: A system which utilizes the processing capabilities of the graphics processing unit (GPU) in the graphics controller. Each frame of each video stream is decoded. After decoding the compressed image is separated into an image representing the luminance and an image representing the chroma. The chroma image is resampled as appropriate using the GPU to provide chroma values corresponding to each luminance value at the proper locations. The resampled chroma image and the luminance image are properly combined to produce a 4:4:4 image, preferably in the RGB color space, and provided to the frame buffer for final display. Each of these operations is done in real time for each frame of the video.

Abstract: Provided are decoding methods and decoders for separating luminance and chrominance components of a video signal. In one aspect, a reference subcarrier of a first line of the video signal is used for subsequent lines by applying an appropriate rotation to the reference subcarrier of the first line for each subsequent line. In another aspect, comb filtering is adaptively controlled based on determining whether 90 or 180 degrees relationship is maintained from line to line. In a further aspect, both complimentary and non-complimentary comb filtering are implemented. In yet another aspect, SECAM bell filtering is achieved by rotating the video signal to obtain a baseband signal, low-pass filtering and modulating the baseband signal, and subtracting the modulated low-pass filtered baseband signal from the video signal to notch the chroma component from the luma component.

Abstract: An analog video receiver implemented in an integrated circuit device. The analog video receiver includes an amplifier to amplify an analog video signal having a desired carrier frequency, and a mixing circuit to mix the amplified analog video signal with a complex sinusoid having a frequency substantially equal to the carrier frequency.

Abstract: A method Abstract a histogram of HSV (Hue-Saturation-Value) colors from a color signal. The method includes receiving the color signal having a luminance component (Y) and chrominance components (CbCr). One section of a lookup table is selected according to the luminance component (Y) of the received color signal. The lookup table is divided into a plurality of sections each storing quantizing index values. Each section is divided by concentric circles corresponding to quantizing boundaries of the Saturation from a center, and divided by radial lines. Corresponding quantizing index values are selected according to the chrominance components (CbCr) of the received color signal in the selected section. The histogram index of the HSV colors is abstracted with reference to the selected section and the quantizing index values selected in the selected section.

Abstract: 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.

Abstract: A parameter for determining a chrominance correction curve for use in correcting the chrominance component of each pixel is determined from one or more parameters for determining a luminance correction curve for use in correcting luminance applied to the entirety of one frame of motion picture data. The chrominance component of each pixel is corrected using the chrominance correction curve.

Abstract: A method of motion detection for a 3D comb filter video decoder is disclosed. In this method, a plurality of sampled data FmPx,y is obtained and temporarily stored after a composite video signal is sampled, wherein FmPx,y represents a sampled data of the yth pixel on the xth line of the mth frame inside the composite video signal, and m, x, y are positive integers greater than or equal to 0. Then, Fm+1Px,y, FmPx,y, Fm?1Px,y, and Fm?2Px,y are used to determine a motion/still status of the composite video signal. Since the present invention performs the motion detection according to the composite video signal whose Y/C has not been separated yet, the present invention can accurately determine the motion level.

Abstract: The present invention relates to separation of composite video signals, such as NTSC or PAL signals. In particular, it relates to accurate decoding of chrominance and luminance components, which may reduce so-called dot crawl and false color artifacts of at least some images.

Abstract: An image-capturing apparatus includes an image-capturing unit configured to sequentially output image data in a RAW format related to each of captured images as a result of a continuous series of image capturing operations; a signal processor configured to perform a predetermined process on the image data in a RAW format and output processed image data; image processing circuits configured to perform a luminance/color-difference conversion process and a data compression process on the processed image data and output compressed image data; and a recording controller configured to cause compressed image data output from the image processing circuits to be recorded in a predetermined recorder. The signal processor includes a selection output unit configured to selectively output the processed image data related to each of the captured images to the image processing circuits and cause the image processing related to each captured image to be shared by the image processing circuits.

Abstract: A three-dimensional video composite signal demodulating method and system capable of inhibiting pseudo-color noises. The system has a two-dimensional luminance and chroma signal separator, a three-dimensional luminance and chroma signal separator, a luminance weighting device, a chroma weighting device and a band pass filter. The method applies the two-dimensional luminance and chroma signal separator to obtain a two-dimensional luminance and chroma signal of a pixel, next the three-dimensional luminance and chroma signal separator to determine the pixel still or not according to a two-dimensional luminance and chroma signal change between a current frame and its previous and following frames with respect to the pixel, and gives appropriate weights to luminance and chroma signals generated by the two-dimensional and the three-dimensional luminance and chroma signal separators respectively, thereby respectively adding and obtaining separated luminance and chroma signals of the pixel.

Abstract: Certain embodiments of the invention may be found in a method and system for handling deadlock conditions in a data processing system. Aspects of the method may comprise identifying a potential deadlock state in a distribute and merge data processing system. An actual deadlock state may be detected once the potential deadlock state is identified. The detected actual deadlock state may be indicated by generating a signal. The method may comprise initiating recovery from deadlock conditions by generating at least one signal that indicates when data is accepted in response to the indication of the actual deadlock state.

Abstract: A method and system for cross color elimination is disclosed in processing of a component video signal comprising component luminance and chrominance information. Aspects of the exemplary embodiments include using separated luminance and chrominance information for each pixel in a current frame, getting absolute distance values between C=a current frame pixel color, P=a previous frame pixel color, H=a high frequency color of the previous frame, and O=a center of a color space; comparing each absolute distance value with a predetermined threshold, wherein if any of the absolute distance values exceed the predetermined threshold, then the pixel is a cross color pixel; and for each cross color pixel, replacing a current frame pixel color with a high frequency average pixel color.

Abstract: System and method for processing videos and images to a determined quality level. According to an embodiment, the present invention provides a method for enhancing video. The method includes providing a first video element that is uncompressed. The method also includes determining motion information associated with the video element. The method further includes providing a second video element by removing at least a defect from the first video element. The second video element includes a color luminance and a luminance. In addition, the method includes de-interlacing the second video element using the motion information. Furthermore, the method includes scaling the second video element. Also, the method includes providing a third video element by enhancing the chrominance and enhancing the luminance of the second video element. The method additionally includes outputting the third video element.

Abstract: A system and method for improving decisions for 2D combing of a video. A 2D-comb is applied to a baseband video signal, thus producing a chroma component of the signal, and an associated combing error. A narrowband filter is applied to the chroma component to produce a filtered chroma component. The chroma component and the filtered chroma component are blended in proportions based on the amount of combing error to produce a new chroma component. A larger combing error induces selection or blending a larger portion of the filtered chroma component, which as a result of narrowband filtering contains less cross-chroma error. Subtracting the new chroma component from the baseband video signal produces a new luma component. The chroma component can also be filtered using a wider band filter to produce a non-complementary chroma component to be subtracted from the baseband video signal to produce the new luma component.

Abstract: Disclosed are an image quality improvement device and method. The image quality improvement device includes a filter which separates an input video signal into a luminance signal and a chrominance signal, and a noise reduction unit which detects a motion in the input video signal by using the luminance signal separated by the filter, and thereby performing different filtering operations according to the existence of the motion.

Abstract: A video signal judgment circuit for judging the condition of a video signal compounded of a picture signal and a synchronization signal is provided. The video signal judgment circuit is adapted to first filter the video signal by a low-pass filter (LPF) having an adjustable cutoff frequency and then separate the synchronization signal from the filtered signal to provide a pulsed synchronization detection signal. Upon comparison of a detection signal formed on the basis of the synchronization detection signal with an adjustable judgment reference value, the video signal judgment circuit outputs a video signal judgment signal indicative of the condition of the video signal as to whether or not the video signal is nullified or deteriorated.

Abstract: Methods and systems for correlation sharpening filtering of a composite video signal are provided. A correlation between a current pixel and at least one adjacent pixel may be determined. A plurality of chroma video signal components of a composite video signal may be blended based on the determined correlation. A luma video signal component may be determined based on the blended chroma video signal components. At least a portion of the plurality of chroma video signal components may be filtered, resulting in filtered chroma video signals. At least a portion of the plurality of chroma video signal components may be blended with the filtered chroma video signal based on the determined correlation. The blended at least a portion of the plurality of chroma video signal components may be removed from the composite video signal to obtain the luma video signal component.

Abstract: A simplified Y/C separation circuit separates a composite video signal into a first luminance signal and a first color signal without subjecting the composite video signal to three-dimensional processing. A color demodulation circuit color-demodulates the first color signal into a first color difference signal. A three-dimensional processing portion removes an image quality debasing component by performing three-dimensional processing with respect to the first luminance signal and the first color difference signal or a second luminance signal constituting a component video signal and a second color difference signal. A selector selectively supplies the first luminance signal and the first color difference signal or the second luminance signal and the second color difference signal to the three-dimensional processing portion.

Abstract: Input pixels are input to a thinning processing circuit. When thinning is performed at the thinning processing circuit, minimum values are selected in order to reduce the pixel data, whereby loss of thin lines is prevented. The thinned image data are input to a binarization processing circuit. Although the image having been thinned through selection of minimum values becomes dark as a whole, collapse of characters can be suppressed, because the binarization processing circuit dynamically changes a binarization threshold by employing, as the binarization threshold, the average of maximum and minimum values in each local region. In a density flat portion, the local maximum value and the local minimum value assume the same value. Therefore, when the difference between the local maximum value and the local minimum value is not greater than a predetermined range, binarization is performed by use of a fixed threshold value.

Abstract: An embodiment has a C separating circuit which separates a carriage color signal and which outputs a reference, a lead, and a delayed composite video signals, a filter that extracts a high-frequency carriage color component with a significant variation in hue from the carriage color signal, a first calculation circuit which outputs a first luminance signal, a second calculation circuit which subtracts the carriage color signal from each of the reference, the preceding lead, and the delayed composite video signals and which derives a second luminance signal having an intermediate value, and a selection circuit which outputs the second luminance signal when the high-frequency carriage color component has a value larger than the reference value and which derives the first luminance signal when the high-frequency carriage color component has a value smaller than the reference value.

Abstract: A YC separator circuit which is capable of achieving YC separation at a high accuracy. The YC separator circuit comprises line memories, bandpass filters, an edge detector circuit, a color correlation determining circuit, and a YC separation filter circuit. The YC separator circuit separates a C signal from a composite signal using a two-line comb filter or a three-line comb filter. The subtractor subtracts the C signal separated by the YC separation filter circuit from the composite signal to separate a Y signal. A trap filter is a frequency filter for dividing a Y signal from a composite signal. A luminance correlation determining circuit calculates a difference between the Y signals received from the subtractor and trap filter, and outputs the Y signal separated by the subtractor when the difference is larger than a predetermined value, and outputs the Y signal separated by the trap filter when the difference is smaller than the predetermined value.

Abstract: The invention provides improved video comb filtering. One aspect of the invention considers detected motion of an object between a reference signal and a comparison signal in determining whether to comb and if combing is indicate, what portion of each of the signals to use for combing. Another aspect of the invention detects non-coherent combing decisions and eliminates the non-coherency. Yet another aspect of the invention uses luma bandwidth reduction and/or chroma bandwidth reduction in the case of a comb failure.

Abstract: An apparatus comprising a video decoder configured to receive a composite video signal modulated on a sub-carrier signal and having a luma component and a chroma component, the video decoder configured to perform a motion detection operation on the luma component and the chroma component in a plurality of frequency regions respectively. The video decoder includes variable threshold logic, coupled to the video decoder, and configured to provide a unique threshold value to the video decoder for each of the plurality of frequency regions respectively. The apparatus also includes a sub-carrier detection logic, coupled to the variable threshold logic, and configured to detect the sub-carrier signal by checking both spatial and temporal characteristics of the sub-carrier detection logic.

Abstract: The present invention provides an apparatus and method for an adaptive Y/C separator that selects between input filters responsive to features of video signals. The adaptive Y/C separator can monitor the results of numerous filters and choose a combination of separators dependent upon signal properties. The adaptive Y/C separator can even blend results of the Y/C separators to improve signal quality.

Abstract: Certain embodiments of the invention disclose a method and system for processing in a non-line locked system. The phase relationship between the sub-carrier signal on consecutive video lines in a video comb filter is determined by synchronizing the two video lines. The synchronization is achieved by aligning the color bursts signals in each of the two video lines. The phase error between the two video lines is determined through the use of a correlation operation. The phase error between consecutive video lines is used to automatically adjust the delay lines used by the video comb filter. The line delay adjustment is provided by changing the values of a variable integer delay and a fractional integer delay. Line delay adjustments reduce the artifacts that occur in the separation of luma and chroma components of a composite video signal.

Abstract: According to one embodiment, a Y/C separation apparatus executes a Y/C separation based on a difference between frames of a composite video signal. The Y/C separation apparatus includes: a motion detection unit that specifies a motion amount based on an amount of a two-frame difference or one-frame difference at each of target pixels; and a determination unit that determines if an image is still based on a motion detection result of the motion detection unit. The motion detection unit detects differences for pixels adjacent to the target pixels.

Abstract: The present invention discloses a method of inter-frame Y/C separation. The method first samples a composite video signal for temporarily storing a plurality of sampled data FmPx,y, wherein the FmPx,y represents data of the y pixel at the x line of the m frame, and the m, x and y are integers larger than, or equal to, 0. Then the method measures a plurality of luma data Yx,y by the Fm+1Px,y, the FmPx,y, the Fm?1Px,y and the Fm?2Px,y, wherein Yx,y represents luma data of the y pixel of the x line. Finally, the method measures a plurality of chroma data Cx,y by the Fm+1Px,y, the FmPx,y, the Fm?1Px,y and the Fm?2Px,y, wherein Cx,y represents luma data of the y pixel of the x line.

Abstract: A YC separation filter of 3-dimensional YC separation for separating a luminance signal and a chromatic signal adaptively to motion of picture image. The YC Separation filter controls frame delay operation of an input composite video signal per clock period based on an hd signal generated from a sub carrier phase of input composite video signal, and controls frame delay operation of the input composite-video signal per period less than 1 clock by compensation filter based on a sampling phase detection result of the input signal, one frame delayed signal and two frames delayed signal. The YC separation filter obtains one frame delayed signal and two frames delayed signal synchronized to the phase of input composite video signal even the system clock is not synchronized to the input composite video signal.

Abstract: A method and/or apparatus for separating a video signal into a luminance signal and a chrominance signal is disclosed. The method first generates a target video signal and a plurality of reference video signals by delaying the video signal, then generates a plurality of intermediate signals such as an HCS, VCS and SLED according to the target signal and the plurality of reference signals, and finally generates the chrominance signal of the video signal by determining the HCS, the VCS, and the SLFD and generates the luminance signal of the video signal according to the chrominance signal of the video signal and the plurality of reference video signals.