Abstract: A device and method are provided for implementing digital baseband separation of composite video signals with reduced memory requirements. The method and device require that only the composite signal be stored in a large delay element. Multiple quadrature demodulators are employed to generate multiple delayed complex baseband signals. Therefore, no large complex baseband delay element is required.

Abstract: A video signal processor for improving a detection precision of Y motion and C motion, preventing erroneous judgment, and preventing deterioration of image quality without being influenced by the band of the luminance signal or the phase of a sub-carrier of chroma.

Abstract: A hardware-based circuitry for digital processing for color saturation control circuitry, brightness control circuitry, contrast control circuitry, and color hue control circuitry, some or all of which can be added to the luminance/chrominance (Y/C) signals to the red green blue (RGB) digital YCbCr-to-RGB conversion circuitry that is required by devices such as an LCoS display device. (these controls can also be used without the Y/C-to-RGB conversion surrounding. Important is the fact that the signals for control be in Y/C domain) A digital video signal from the source in the Y/C (luminance/chrominance) domain is fed into processing circuitry, where the C (chrominance) component is split into Cb and Cr subcomponents. Digital YCbCr-to-RGB conversion circuitry transforms the Y/C signals to RGB domain, required by, for example, the LCoS display device.

Abstract: A method for generating a representation of a particular signal among video signals representing a display, the signals including a first component having a first bandwidth and a second component having a smaller second bandwidth, includes the steps of: (a) measuring first samples of the first component outside the second bandwidth for an interval in each signal; (b)measuring second samples of the second component inside the second bandwidth for the interval; (c) establishing factors based upon first samples; (d) establishing filter modes based upon second samples; (e) establishing a correlation between factors and filter modes; (f) filtering the signals using a selected filter mode; (g) identifying a selected factor according to the correlation for the selected filter mode; (h) employing the selected factor for weighted mixing of the samples to generate the representation for the time interval; and (g) repeating steps (a) through (h) until the representation is completed.

Abstract: A Y/C separator improving characteristics of dot crawl elimination and cross-color interference elimination even at a sampling frequency unequal to an integer multiple of a color subcarrier frequency of an NTSC television signal. A received composite color television signal is quantized by a clock signal with a frequency synchronized to the horizontal sync signal of an input signal. Chrominance component values are extracted in various directions of a target sample by using neighboring samples of the target sample. The chrominance component is obtained by selecting and outputting the extracted chrominance component values in accordance with correlation values of the corresponding samples from which the color component is removed. The calculation of the chrominance component extraction value is carried out by detecting the phase rotation angle of the color subcarrier signal per clock near the target sample, and in response to the detected value.

Abstract: An image signal processing device of the present invention includes an RGB-YC conversion for converting color component signals output from a CCD (Charge Coupled Device) image sensor to luminance signals and components thereof lying in a high frequency range. The luminance signals and their components lying in a high frequency range are fed to a first, a second and a third low pass filter (LPF), respectively. Luminance signals output from a third LPF are fed to an adder while components lying in a high frequency range are fed from the first LPF to a selector. Further, the components output from the second LPF are fed to the selector via a resolution correcting section. The selector selects either one of the two different kinds of components input thereto. The adder adds the luminance signals output from the third LPF and the components selected by the selector and thereby outputs second luminance signals.

Abstract: The present invention provides an adaptive Y/C separation circuit for video signal processing that is capable of correcting previous color discrepancy in separating the luminance (Y) and chrominance (C) signals from the color video signals. In the process, the correlation of video signals on referencing scanning lines is analyzed by transposing the chrominance signals onto a two-dimensional UV plane. A correlation coefficient is obtained through the analysis for adjusting the video signals in the direction of the actual chrominance level, thus separating the luminance and chrominance signals with relatively low cost circuit implementation.

Abstract: A dot detection section of a dot-interference detection section detects a portion where pixels are arranged as “dark-bright-dark” or “bright-dark-bright” in the horizontal direction, within a Y signal containing dot interference, separated by a YC separation process, and outputs the detection result as dot values to a horizontal array checking section and a vertical array checking section. The horizontal array checking section detects whether or not dot values of a predetermined number of pixels arranged horizontally in such a manner as to contain a subject pixel, have the same value. The vertical array checking section detects whether or not dot values of a predetermined number of pixels arranged vertically in such a manner as to contain a subject pixel, are alternately generated as 1 and 2. An enhancement processing section performs an enhancement process on the Y signal of portions other than the portions where dot interference occurs.

Abstract: An oblique correlation detection section detects correlation in an oblique direction (oblique correlation) of a composite video signal. A line correlation chrominance separation section extracts a first chrominance signal from the composite video signal based on vertical correlation of the composite video signal. A first chrominance signal acquisition section acquires a second chrominance signal based on horizontal self-correlation of the first chrominance signal. The first chrominance signal acquisition section detects the self-correlation within a range corresponding to the degree of the oblique correlation detected by the oblique detection section.

Abstract: A method and apparatus that allows a display device to adaptively and automatically control display contrast and color is disclosed. The method and system in accordance with the present invention can be described by the following sequential process: 1. Separating an input image data value into its luma and chroma components. 2. Collecting the luma distribution data over the entire image or a specified window. 3. Analyzing the luma distribution. 4. Generating an appropriate contrast control response that modifies the input luma component to generate an output luma component, on a pixel by pixel basis. 5. Analyzing the input luma component and the output luma component, and an input chroma component, to generate an appropriate modification for the chroma component, on a pixel by pixel basis.

Abstract: A luminance signal/chrominance signal separation apparatus is provided with a detector for detecting diagonal components of a luminance signal from a composite video signal, wide-band pass filters, and narrow-band pass filters, wherein band pass filters to be connected to a three-line chrominance separation circuit are selected according to the amount of diagonal components of the luminance signal, thereby reducing cross color and improving resolution.

Abstract: An apparatus for separating color and luminance signals from a composite video signal in consideration of the existence and degree of a motion of the video image. The apparatus includes an output section, a first filter, a second filter, a third filter, a motion detector, a motion estimator, a color selector and a luminance selector. The color and luminance selectors select and output the color and the luminance signal from the output signals of the filters in accordance with the existence and degree of the motion.

Abstract: An apparatus and a method for processing auxiliary data included in a video signal, in particular auxiliary data included in the vertical blanking interval of a television signal. The present invention recognizes that comb filtering of a television signal before processing the auxiliary data included in the television signal may cause corruption of the data. The present invention overcomes the problems associated with the data corruption by placing the takeoff point for the auxiliary data at a point in the signal path prior to the comb filtering. In an exemplary embodiment, the present invention also provides for switching between one of a plurality of signal sources while ensuring that the signal provided to an auxiliary data processor corresponds to the displayed signal and minimizing the additional hardware and software required with regard to prior art arrangements.

Abstract: A system and method for detecting features in video from business meetings and video teleconferencing systems can use color, motion, morphological (shape) filtering and a set of heuristic rules to determine possible features in the scene. One embodiment includes obtaining a first video frame of images and a second video frame of images, performing a luminance conversion on the first video frame of images and the second video frame of images, performing a motion filter operation on the converted first and second frames of images, performing a chrominance normalization on the second video frame of images, performing a color filter operation on the normalized second video frame of images, and processing the first and second frames of video images after the motion filter and color filter operations.

Abstract: An apparatus for separating luminance and chrominance signals from an NTSC composite video signal includes first through fourth delayers connected to a digital composite video signal in series for delaying input signals each by 1, a first filter for separating a first chrominance signal from signals output from the first and second delayers; a second filter for separating a second chrominance signal from signals output from the second and third delayers, a vertical edge direction detector for detecting a vertical edge direction by receiving signals output from the second and fourth delayers and receiving the digital composite video signal, a multiplexer for outputting one of the first and second chrominance signals based on a signal output from the vertical edge direction, a chrominance signal outputting unit for receiving the output of the multiplexer and then outputting a perfect chrominance signal, and a luminance signal outputting unit for receiving the signal of the second delayer and receiving the chrom

Abstract: A method and an apparatus of decoding a television broadcasting signal are disclosed. In one embodiment, an improved video decoder converts the video signal into a digitized video signal. The improved video decoder then separates luminance information and chrominance information of the digitized video signal in a dimension that has a constancy value below a predetermined threshold level. Lastly, the improved video decoder optionally converts the separated luminance information and chrominance information into an output format that conforms to input requirements of the NTSC/PAL television.

Abstract: A video signal input selector is subject to cross coupling between selectable video signals. The input selector comprises a video amplifier coupled to amplify a video signal selected from said selectable video signals. A controllable switch has first and second elements, the first element receives the selected video and is coupled to signal ground. The second element receives the selected video and is coupled to the amplifier. During a first condition the first element is controlled to be open circuit and the second element is controlled to be short circuit coupling the selected video signal to the video amplifier. In a second condition the first element is controlled to short circuit the selected video signal to the signal ground and the second element is controlled to be open circuit substantially inhibiting the selected video signal from coupling to the video amplifier.

Abstract: A method and system for performing combing for PAL luma data is disclosed. The combing is performed for a display having a plurality of lines. The display is capable of depicting a frame including a horizontal boundary having a top edge and a bottom edge. A top line of the plurality of lines is at the top edge of the horizontal boundary. A bottom line of the plurality of lines is at the bottom edge of the horizontal boundary. The method and system includes providing a feedback multiplexer, a line delay and a feed forward multiplexer. The feedback multiplexer has a first input, a second input and a first output. The first input is for receiving luma data for a current line. The line delay has a delay input and a delay output, the delay input coupled with the first output. The delay output is coupled with the second input. The feed forward multiplexer has a third input, a fourth input and a second output. The third input is coupled with the delay output.

Abstract: A video signal processor for improving a detection precision of Y motion and C motion, preventing erroneous judgment, and preventing deterioration of image quality without being influenced by the band of the luminance signal or the phase of a sub-carrier of chroma.

Abstract: Method and system for an adaptive three-dimensional Y/C comb filter are disclosed. A composite TV signal is input into a color decoder. A first decision-making module determines if an edge passing through a current sample pixel is a color or colorless edge. If the edge is colorless, a second decision-making module determines if the edge is lying vertically, horizontally, or temporally. Once the second decision-making module determines the direction in which the edge lies, the module applies an appropriate Y/C comb filter to the input composite TV signal. If the edge is a color edge, a third decision-making module determines if the edge is lying vertically, horizontally, or temporally. Once the third decision-making module determines the direction in which the edge lies, the module applies an appropriate Y/C comb filter to the input composite TV signal.

Abstract: A method, apparatus, and system for reducing cross-color distortion in an image produced by a composite video signal decoder is disclosed. Cross-color distortion, which is due to high frequency luminance being passed through the chrominance signal, is reduced by processing chrominance phases (i.e., color information) associated with a reference pixel and pixels adjacent the reference pixel to derive a scaling factor for scaling the reference pixel. The reference pixel is attenuated by the scaling factor if none of the adjacent pixels have a chrominance phase that is similar to the reference pixel.

Abstract: A method, apparatus, and system for reducing chrominance artifacts in a luminance signal obtained from a composite NTSC television signal is disclosed. Chrominance artifacts are reduced by detecting chrominance artifacts in the luminance signal of a current line and a previous line, weighting the luminance signal of the current line and the luminance signal of the previous line based on the detected chrominance artifacts, and combining the weighted luminance signal of the current line and the weighted luminance signal of the previous line for use as the luminance signal for the current line. Reducing chrominance artifacts reduces the occurrence of “hanging-dots” displayed on a television monitor, which are due to incompletely canceled chrominance artifacts in the luminance signal.

Abstract: A simulated burst gate signal and a video synchronization key are generated. A video decoder generates a horizontal sync pulse which is programmed to envelop a color burst, thereby simulating a burst gate signal. The offset to the horizontal sync pulse due to simulating a burst gate signal may be compensated at a video memory subsystem receiving the horizontal sync signal, in order to determine when active pixels are provided by the video decoder. Alternatively, counter circuitry external to the video decoder may be used to generate a simulated burst gate signal by counting the number of pixel clock cycles between the horizontal sync pulse and the color burst. Unlike a burst gate signal generated within a video decoder for use with color separation circuitry in the video decoder, a simulated burst gate signal allows for use of color separation circuitry external to the video decoder. Detecting a color burst using external color separation circuitry is thus also disclosed.

Abstract: A Y/C separator improving characteristics of dot crawl elimination and cross-color interference elimination even at a sampling frequency unequal to an integer multiple of a color subcarrier frequency of an NTSC television signal. A received composite color television signal is quantized by a clock signal with a frequency synchronized to the horizontal sync signal of an input signal. Chrominance component values are extracted in various directions of a target sample by using neighboring samples of the target sample. The chrominance component is obtained by selecting and outputting the extracted chrominance component values in accordance with correlation values of the corresponding samples from which the color component is removed. The calculation of the chrominance component extraction value is carried out by detecting the phase rotation angle of the color subcarrier signal per clock near the target sample, and in response to the detected value.

Abstract: An oblique correlation detection section detects correlation in an oblique direction (oblique correlation) of a composite video signal. A line correlation chrominance separation section extracts a first chrominance signal from the composite video signal based on vertical correlation of the composite video signal. A first chrominance signal acquisition section acquires a second chrominance signal based on horizontal self-correlation of the first chrominance signal. The first chrominance signal acquisition section detects the self-correlation within a range corresponding to the degree of the oblique correlation detected by the oblique detection section.

Abstract: The present invention provides an adaptive Y/C separation circuit for video signal processing that is capable of correcting previous color discrepancy in separating the luminance (Y) and chrominance (C) signals from the color video signals. In the process, the correlation of video signals on referencing scanning lines is analyzed by transposing the chrominance signals onto a two-dimensional UV plane. A correlation coefficient is obtained through the analysis for adjusting the video signals in the direction of the actual chrominance level, thus separating the luminance and chrominance signals with relatively low cost circuit implementation.

Abstract: The decoder for separation of Y (luminance) signals and C (color) signals from composite signals includes a correlation judging section. It is adapted to judge whether there is line correlation among neighboring signal lines including a signal line to be separated during each of the horizontal scanning intervals. A stripe component judging section is adapted to judge whether an image having vertical stripes is contained in the composite signal. A filter section having first and second filters is used selectively depending on correlation results, and a selecting section is adapted to output a signal to select one of filters in accordance with judgment results from both judging sections. The decoder is capable of preventing decreases in resolution in images having vertical stripes.

Abstract: In a color imaging apparatus, a problem of occupying a transmitting line can be avoided without changing color resolution and angle of view in the case of connecting to the external unit. The present invention provides converting means for converting a first digital component signal S1 which has the data rate of luminance data “Y” and first and second chroma data “U” and “V” being K×N:N:N into a second digital component signal S3 which has the same angle of view as said first digital component signal and has the data rate of the luminance data “Y” and the first and second chroma data “U” and “V” being K×N/M:N:N, thereby a second digital component signal S3 having a small amount of data can be generated without changing the angle of view and the color resolution as against the first digital component signal.

Abstract: A DD converter circuit 109 for interpolating a digital video signal which is locked to a 14.3-MHz burst clock to convert the sampling data so as to be locked to a 13.5-NHz free-run clock, and a frame memory circuit 110 for writing a digital video signal which is output by the DD converter circuit 109 on the 14.3-MHz burst clock as well as reading the written digital video signal on a 13.5-MHz clock S112 are included. Therefore, a video signal processor which can realize the rate conversion of the digital video signal without using an analog PLL circuit can be provided.

Abstract: In a color separator circuit, edge detection filters detect an edge encountered in the horizontal direction. When the image signals corresponding to the thus detected edge are processed, selector circuits 12a to 12c select outputs from small-tap-number color separation filters 8a to 8c and 10a to 10c, respectively. When the image signals corresponding to the remaining portion other than the edge are processed, the selector circuits 12a to 12c select outputs from large-tap-number color separation filters 9a to 9c and 11a to 11c, respectively. A ratio calculator circuit 16 calculates, from the luminance signals fed from adder circuits 13a to 13c, the value by which a multiplier circuit 18 performs multiplication. The multiplier circuit 18 multiplies, by this value calculated by the ratio calculator circuit 16, the color separation signals added together by an adder circuit 17 so that, of all the color separation signals of which there are two kinds, those of one kind are vertically interpolated.

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 luminance (Y) and a color difference (C) signal separator switches filters according to an image and separates a Y signal and a C signal included in a composite color picture signal to eliminate a degradation which would otherwise be involved at a transition point because of the characteristics of the filters. A first weighting circuit calculates the weighted average of the C signals extracted from the composite signal by a comb filter and a three-line comb filter. A second weighting circuit calculates the weighted average of the C signals extracted by the three-line comb filter and a two-line comb filter. When the motion level of the image exceeds a predetermined threshold, a selector selects, as the final C signal, the signal output from the second weighting circuit. When the motion level is equal to or lower than the predetermined threshold, the selector selects, as the final C signal, the signal output from the first weighting circuit.

Abstract: A video data transmission system in which a transmission terminal (1) having a color camera (4) is required to transmit video information to a reception terminal (3) having only a black and white display (7). In order to minimise the transmission bit-rate, during a set-up process the reception terminal (3) sends a “LuminanceOnly” flag to the transmission terminal (1) advising the transmission terminal to send only the luminance component of the video signal generated by the color camera (4). The chrominance components generated by the camera (4) are either discarded or encoded as null data prior to transmission.

Abstract: A sample rate converter that includes a number of selector elements coupled to a summing circuit. Each selector element receives a respective set of one or more processed data samples and provides one of the processed data samples. Each processed data sample is generated by delaying an input sample by zero or more clock cycles and scaling the sample by a particular scaling factor (e.g. 2N, where N is 0, 1, 2, and so on). The summing circuit receives and combines the processed data samples from the selector elements to generate an output sample. A delay and scaler circuit can receive the input sample and provide one set of processed data samples for each selector element. The delay and scaler circuit can include one or more delay elements coupled in series and to a scaling circuitry that scales selected ones of the input and delayed samples. The scaling can be implemented by simply bit-shifting the samples. The elements of the sample rate converter can be configured to implement a K-tap, P-phase interpolator.

Abstract: The invention relates to an image data expansion processor for digital still camera. Two blocks of 8-bit luminance data and one block of 8-bit color difference data are repeatedly output from a compressing/expanding unit in the above order and are supplied to a buffer memory. Two blocks of 16-bit data to be written are generated corresponding to the two blocks of 8-bit luminance data and one block of 8-bit color difference data, are sequentially supplied from the buffer memory to a frame memory in units of block and are written to the frame memory. Each of luminance data and color difference data is not written to the frame memory in units of block but 16-bit data to be written composed of these luminance data and color difference data is written to the frame memory in units of block. The number of blocks written to the frame memory can be reduced and total time required for switching an address in the direction of lines can be reduced.

Abstract: An adapting connector for a video machine has an S terminal, a VIDEO terminal, and two filter units connected to the S terminal and the VIDEO terminal. The filter units of the adapting connector eliminate noise from the transmitting signal between the S terminal and the VIDEO terminal to output a high quality image.

Abstract: An adaptive filter is disclosed comprising a source (1) for a television signal (f), a delay device (2) for forming delay signals (v0 to v5) from the television signal, a filter combination (3) comprising at least one comb-up device and one comb-down device (3.4, 3.1) for forming filter signals (s1 to s4) from the delay signals, a mixer (5), a decision device (4) for analyzing the delay signals (v0 to v5), and a computing matrix (7) for forming weighting factors (g) for the mixer (5). A manually controllable or data-controllable setting device (8) is coupled to the decision device (4) for changing the mixing behavior in the mixer (5), which is dependent on a predetermined algorithm in the decision device (4) and/or the computing matrix (7).

Abstract: A video apparatus comprises a correction circuit for delaying a luminance stream in a digital stream. The correction circuit has a demultiplexer, a line buffer and a multiplexer to achieve this. This construction allows to compensate for the luminance 2H-delay of conventional VHS and S-VHS signals.

Abstract: A decoder for composite video signals is provided which is capable of preventing decreases in resolution at a time of YC (Luminance and color signals) separation from composite signals indicating images having vertical stripes.

Abstract: A method and an apparatus of decoding a television broadcasting signal are disclosed. In one embodiment, an improved video decoder converts the video signal into a digitized video signal. The improved video decoder then separates luminance information and chrominance information of the digitized video signal in a dimension that has a constancy value below a predetermined threshold level. Lastly, the improved video decoder optionally converts the separated luminance information and chrominance information into an output format that conforms to input requirements of the NTSC/PAL television.

Abstract: An image processing apparatus includes a data dividing section for dividing digital data into a plurality of blocks of data. A first parallel shift control section controls, block by block, first parallel shift for shifting the blocks of digital data to positions coinciding with an angle of rotation of an image. A second parallel shift control section subdivides the digital data in each of the blocks into subblock data, and controls second shift for shifting the subblock data in each block to positions coinciding with the angle of rotation of the image such that a color image is correctly displayed. The apparatus is capable of rotating a color image correctly and rapidly with a simple circuit arrangement.

Abstract: Techniques for enhancing edges in video signals while reducing the amounts of undershoots and overshoots. A video signal is processed to generate a first signal indicative of detected edges in the video signal. The first signal can be generated by lowpass filtering the video signal to generate a lowpass signal and subtracting the lowpass signal from a luminance signal that has been extracted from the video signal. The first signal is then processed with a “non-linear” transfer function to generate a second signal having enhanced edges. The second signal is used as the correction or enhancement signal, and is added to the lowpass signal to provide an output signal having enhanced edges with reduced or minimal amounts of undershoots and overshoots.

Abstract: Disclosed are an apparatus and a method for YC separation and three-line correlation detection with high accuracy, which allow the YC separator to generate reliable Y signals. The correlation detecting apparatus includes a sub-correlation detector. The detector checks input signals for the presence or absence of vertical correlation, and provides the signals with a judgment “high-correlation exists” or “otherwise”. According to the judgment, the correlation detecting apparatus changes the process; i) when accepted the judgment “high-correlation exists”, the apparatus determines the judgment to be reliable and adopts it as the output, ii) when accepted “otherwise”, the apparatus increases its detecting accuracy and provides the signals with multi-leveled outputs according to the correlation levels. In this way, the main apparatus switches the detecting mode according to the result from sub-correlation detector, with the detecting accuracy greatly improved.

Abstract: A video signal decoder including a comb filter characterised by means for changing the operating mode of the filter progressively. Also, a video signal decoder including a comb filter characterised by means for adjusting continuously the degree of filtering performed by the filter. In one arrangement the decoder comprises an input filter and two signal multipliers wherein one of the multipliers is connected to receive a signal output by the input filter and the other multiplier is connected to receive a signal output by the comb filter wherein operation of the multipliers is mutually interdependent.

Abstract: A method and apparatus for processing video signals to a plurality of video outputs may be done within a video system that includes a video decoder, a digital-to-analog module, and an output control module. In such a video system, the video decoder includes an analog-to-digital conversion module for converting an input video signal(s) into a digital video signal(s). The video decoder further includes a comb filter that is operably coupled to receive the digital video signal and to produce therefrom a Y component digital signal and a C component digital signal. The output control module is operably coupled to receive the Y and C component digital signals and also to receive an output command. If the output command dictates, the output control module provides the Y and C component digital signals to the digital-to-analog module. In response, the digital-to-analog module produces a composite video output and an S video output.

Abstract: In a color separator circuit, edge detection filters detect an edge encountered in the horizontal direction. When the image signals corresponding to the thus detected edge are processed, selector circuits 12a to 12c select outputs from small-tap-number color separation filters 8a to 8c and 10a to 10c, respectively. When the image signals corresponding to the remaining portion other than the edge are processed, the selector circuits 12a to 12c select outputs from large-tap-number color separation filters 9a to 9c and 11a to 11c, respectively. A ratio calculator circuit 16 calculates, from the luminance signals fed from adder circuits 13a to 13c, the value by which a multiplier circuit 18 performs multiplication. The multiplier circuit 18 multiplies, by this value calculated by the ratio calculator circuit 16, the color separation signals added together by an adder circuit 17 so that, of all the color separation signals of which there are two kinds, those of one kind are vertically interpolated.

Abstract: A device for transferring serial data includes a first temporary memory for temporarily storing the serial data supplied from an input terminal; a first-memory for storing the data supplied from the first temporary memory; a second temporary memory for temporarily storing the serial data supplied from the input terminal; a second memory for storing the data supplied from the second temporary memory; a first transfer state detecting circuit for generating a first control signal indicative of that the serial data supplied from the input terminal is being transferred, a second transfer state detecting circuit for generating a second control signal indicative of that the serial data supplied from the input terminal is being transferred; a control circuit for deciding that the first and the second control signal have not arrived in response to the arrival of a transfer command signal, thereby transferring the data from the first temporary memory to the first memory and transferring the data from the second tempora

Abstract: A simplified Y/C separation circuit in which, a plurality of luminance signals are calculated for the subject pixel based on an NTSC signal of the subject pixel and NTSC signals of pixels that are close to the subject pixel spatially or temporally. Correlations between the plurality of luminance signals are obtained in a difference circuit and a comparison circuit. In a classification circuit, classification is performed, that is, the subject pixel is classified as belonging to a certain class, based on the correlations between the plurality of luminance signals. Prediction coefficients corresponding to the class of the subject pixel are read out from a prediction coefficients memory section. The RGB luminance signals of the subject pixel are then determined by calculating prescribed linear first-order formulae.

Abstract: A VGA (or other component video signal) output, e.g. from a computer or DVD player, is subject to protection so it is viewable on a VGA monitor. If the component video signal is converted to composite video (e.g. television) the resulting television picture is of substantially degraded quality, thereby inhibiting viewing and/or copying. This protects for instance copyrighted material in the VGA format from unauthorized use. The protection modifies the horizontal or vertical synchronization signals in the VGA video in such a way that there is no adverse affect on a typical VGA monitor. Most or all VGA to television converters and/or television sets and VCR's suffer from loss of synchronization, resulting in an unviewable picture. Methods and apparatuses for defeating this copy protection are provided herein.

Abstract: A video composite signal is thinned by sub-Nyquist sampling signal to reduce a capacity of a memory, a carrier chrominance signal is separated from the thinned video composite signal by an inter-frame YC separation circuit 13, the first separated carrier chrominance signal is interpolated by horizontal interpolation circuit 25 to reproduce the lost data due to thinning, the interpolation data is compensated by an adding circuit 29 in accordance with a high frequency component in a second separated carrier chrominance signal separated without thinning detected by an intra-field YC separation circuit 16 and high frequency component extraction circuit 28 when an edge is present in the separated carrier chrominance signal from the inter-frame YC separation circuit 13, which is detected by an edge detection circuit 26, the first separated carrier chrominance signal is outputted at the timing corresponding to the sub-Nyquist sampling signal, the interpolation data is outputted at an interpolation timing when the ed