Abstract: A system and method allows a high-bandwidth serial or parallel digital video broadcast data signal to be monitored on a low-cost digital display device such as a computer monitor. The system includes means for extracting horizontal and vertical synchronization information and clock from the digital video broadcast data signal, and a transmitter converting the digital video data signal and the horizontal and vertical synchronization information and the clock into a Digital Visual Interface (DVI)-compliant digital video data signal.

Abstract: A method for generating time independent images of moving objects with the image information being related to properties of the moving objects represented by sequences of digital images. The images are transformed into a series of space-time representations of the image data. A function is derived from the space-time representation images that approximates the object motion and is used to create time independent images of the moving objects.

Abstract: A method is disclosed for converting and mixing a plurality of video data without data loss. The video data have a plurality of sampling formats, and the sampling formats at least comprise a high chrominance-sampling-rate format and a low chrominance-sampling-rate format. The method includes receiving a first video data in the low chrominance-sampling-rate format and a second video data in the high chrominance-sampling-rate format, converting the first video data in the low chrominance-sampling-rate format into a first video data in the high chrominance-sampling-rate format, and mixing the first video data in the high chrominance-sampling-rate format with the second video data in the high chrominance-sampling-rate format for generating a mixed video data in the high chrominance-sampling-rate format.

Abstract: Transforming digital images including luminance data relating to points with first coordinates and chrominance data relating to points with second coordinates is performed. More particularly, the transforming is performed where one of the luminance data and the chrominance data is more numerous than the other. This is done by processing the least numerous data by filtering to obtain least numerous data relating to points with identical coordinates to those of the most numerous data.

Abstract: By automatically compensating for unwanted lighting effects caused by varying ambient light sources, digital still images and video are made to appear more naturally realistic. A set of correction factors based upon an ascertained ambient lighting conditions, such as color temperature, provides for selectively color correcting only those pixels requiring correction. In this way, only those portions of a digital image having excessive color due to ambient light conditions are improved without affecting those portions of the digital image not requiring correction.

Abstract: A method and apparatus for transforming color signals. The transformation is achieved by use of a first, coarse, look-up table and a second look-up table that provides coefficients to be used in calculating a correction vector. The vector of color components from the first look-up table is added to the correction vector to provide the transformed vector. The method and apparatus have particular application in the display of digital video signals.

Abstract: A method and circuit are provided for color space conversion of Y (luminance) and UV (chrominance) components from a planar YUV 4:2:0 format to an interleaved, or packed YUV 4:2:2 format, and from an interleaved, or packed YUV 4:2:2 format to a planar YUV 4:2:0 format. The method for both conversions includes reading source data, interpolating the sampled YUV component values, and performing a pass to thereby write the converted YUV component values in three passes, one pass for all values of the respective YUV components.

Abstract: A display device adopting a single liquid crystal display (LCD) panel, by which a decrement in luminance is reduced using only a single liquid crystal device, is provided. Accordingly, a degradation in color saturation due to an increase in luminance caused by the addition of an achromatic color is compensated for by a four-color conversion algorithm, even when an image is displayed using a single LCD panel or a ferroelectric liquid crystal (FLC) panel. Hence, the brightness of a screen increases compared to the prior art, and more distinct colors can be displayed.

Abstract: A decoding system (100), a RGB video color converter (130) and a method (200) for color conversion of at least part of a decoded currently received YUV frame representing an image is provided. The currently received YUV frame comprises image blocks and RGB color conversion is performed by storing (210) a previous color conversion RGB image in a RGB buffer (145), the image being from an immediately preceding received decoded frame. Next, identifying (250) is effected for identifying the image blocks of the decoded currently received YUV frame that are unchanged relative to corresponding previous image blocks in an immediately preceding received decoded frame. Thereafter, selectively performing (280) YUG to RGB color conversion is effected only on the image blocks of the currently received YUV frame that are not unchanged relative to the corresponding previous image blocks.

Abstract: An apparatus comprising a data modification circuit and a composite circuit. The data modification circuit may be configured to generate a first and second video component in response to a video data stream. The composite circuit may be configured to present an output graphics stream by interleaving the first and the second video component.

Abstract: The absolute value of the difference between each of the pairs of pixel values of a target pixel and an upper pixel with respect to the target pixel, a pixel that is left-adjacent to the target pixel and an upper pixel with respect to the left-adjacent pixel, the left-adjacent pixel and a lower pixel with respect to the left-adjacent pixel, a pixel that is right-adjacent to the target pixel and an upper pixel with respect to the right-adjacent pixel, and the right-adjacent pixel and a lower pixel with respect to the right-adjacent pixel is obtained. A “1” is assigned if the absolute value of the difference is greater than or equal to a predetermined threshold value whereas a “0” is assigned if the absolute value of the difference is smaller than the predetermined threshold value, forming a pattern having six bits in total.

Abstract: A method and circuit are provided for color space conversion of Y (luminance) and UV (chrominance) components from a planar YUV 4:2:0 format to an interleaved, or packed YUV 4:2:2 format, and from an interleaved, or packed YUV 4:2:2 format to a planar YUV 4:2:0 format. The method for both conversions includes reading source data, interpolating the sampled YUV component values, and performing a pass to thereby write the converted YUV component values in three passes, one pass for all values of the respective YUV components.

Abstract: Novel processors and methods of pre-processing video data in-transit from an external video device to an end-user computer are described. The method comprises receiving digital video stream data transmitted on a first video channel from said external video device, transmitting the digital video stream data to a memory for processing by a CPU, processing the digital stream data for transmission via a second video channel, and transmitting the processed video stream data to the end-user computer via the second video channel.

Abstract: A plurality of video signals of which colorimetries are different with each other are inputted. YCrCb-to-RGB conversion circuits converts at least two video signals having different colorimetries to an RGB color signal having a single colorimetry with matrixes corresponding to the colorimetries switched. An RGB-to-YCrCb conversion circuit may be further provided to convert the RGB color signal to a YCrCb signal again to supply it to a display with colorimetry matched to the display.

Abstract: A method and system for capturing live video signal data using bufferless data compression is disclosed. Live video signal data is vertically scaled. A 4:2:2 to 4:2:0 color format conversion is performed simultaneous with the vertical scaling step. A one-dimensional bufferless discrete cosine transform is performed on the scaled live video signal data to create a plurality of scaled DCT coefficients. Each of the plurality of scaled DCT coefficients are then Huffman coded. Each of the Huffman encoded DCT coefficients may then be sent via a USB interface to a USB bus.

Abstract: A system and method allows a high-bandwidth serial or parallel digital video broadcast data signal to be monitored on a low-cost digital display device such as a computer monitor. The system includes means for extracting horizontal and vertical synchronization information and clock from the digital video broadcast data signal, and a transmitter converting the digital video data signal and the horizontal and vertical synchronization information and the clock into a Digital Visual Interface (DVI)-compliant digital video data signal.

Abstract: Signals of odd lines in progressive scanning image signals in a first frame are extracted and displayed along odd lines on a matrix-type display device such as a liquid crystal display panel. Further, signals of even lines in progressive scanning image signals in a second frame successive to the first frame are extracted and displayed along even lines on the display device. Thus, one image of a frame is displayed on the display device in two frame periods so that one of the first and second steps is performed after the other thereof is performed. Alternatively, one of the signals of odd lines are displayed along two successive odd and even lines, while one of the signals of even lines are displayed along two successive even and odd lines. The display methods can be applied to a display panel having a larger number of scanning lines than a number of signal lines.

Abstract: An on-screen display processor for a digital video signal processing system is disclosed. The OSD processor includes logic for converting a graphics bitmap in 4:4:4 format to graphics image words in 4:2:2 format for blending with video image words in a blend multiplexer of the digital video decode system. The OSD processor provides the graphics image words with blended chrominance values each obtained by merging chrominance values of at least two adjacent picture elements of the graphics bitmap. The merging includes mathematically combining U chrominance values of the at least two adjacent picture elements to produce a blended U chrominance and mathematically combining the V chrominance values of the at least two picture elements to obtain a blended V chrominance. In one embodiment, the mathematically combining comprises averaging the U chrominance values to obtain the blended U chrominance and averaging the V chrominance values to obtain the blended V chrominance.

Abstract: An NTSC signal is supplied to a first area extracting circuit and a second area extracting circuit. The first area extracting circuit extracts class taps from the NTSC signal. The second area extracting circuit extracts predictive taps from the NTSC signal. The first area extracting circuit extracts pixels in predetermined positions from same phase pixels as a considered pixel. Based on level differences between extracted pixels, a pattern detecting section performs a class categorization. A class code determining section generates class codes based on the result of the class categorization and supplies the generated class codes to a coefficient memory. The coefficient memory outputs pre-stored predictive coefficients based on the class codes to a predictive calculating section.

Abstract: A multimode scan converter includes a delay element (33) for delaying one horizontal line of video signal and selectively re-displaying that line. A multiplexer (30) is arranged to selectively provide either luminance signal or chrominance signal to the delay element. Output signal from the delay element and output signal from the multiplexer are coupled to a proportioning circuit (34) which sums the two signals in complementary proportions (e.g. K and 1-K). A second multiplexer (35), which provides up-converted output luminance signal, is arranged to selectively pass the luminance signal or signal from the proportioning circuit. A third multiplexer (36), which provides up-converted output chrominance signal, is arranged to selectively pass the chrominance signal or signal from the proportioning circuit.

Abstract: A system for computing color information of a scaled version of a pixel of interest, includes a pixel identifier for identifying pixel color values for pixels in a neighborhood. The neighborhood includes the pixel of interest. The pixels in the neighborhood form a pattern. A transformer transforms the pixel color values of the pixel of interest and the plurality of neighboring pixels to produce a plurality of transformed values. A geometric pattern identifier identifies a geometric pattern which resembles the pattern formed by the pixels in the neighborhood. The geometric pattern is identified as a function of the transformed values. A selector selects an appropriate scaling algorithm to scale the geometric pattern. The algorithm produces the scaled version of the pixel of interest, along with the color information for the scaled pixel.

Abstract: An image conversion device is provided with a first buffer area for storing either one of even field and odd field of inputted dot sequential data and a second buffer area for storing the other thereof. A data transfer control circuit controls in such a manner that, during a period in which one of the two fields is written in the first buffer area, the other field, stored in the second buffer area, is read out in a color field sequential format, and during a period in which the other field is written in the second buffer area, the other field, stored in the first buffer area, is read out in a color field sequential format. A pixel interpolating circuit carries out an insertion-interpolating process on the field read out from the image storing unit, and outputs the resulting data. Thus, it becomes possible to prevent color breaking at the time of displaying motion images on a color field sequential type display by using a buffer area having a capacity of one frame.

Abstract: A pixel filling system or method begins with an initial set of image data that is a subset of data values in a data array fk,l representing data values at corresponding positions (k,l). Some of the fk,l values are initially undefined, while others, at positions where both k and l are even numbers, have initially defined values.

Abstract: A method, system and computer program product for color conforming video material at a given resolution is provided. The given video material is first converted to a lower resolution version of the same material. Then a color corrected version of the lower resolution version of the video material is obtained. A computer then analyzes the lower resolution version and the color corrected version of the lower resolution version in the same three dimensional color space to determine suitable color values for a color conforming version of the video material at the given resolution.

Abstract: A method and apparatus for blending a plurality of image input layers include processing that begins by converting each of a plurality of image input layers that have a color base that differs from a color base of a display into a image layer having the color base of the display, thereby producing converting image layers. The color base of the image input layers and of the output include the colorimetries of various standardized video signals, color space, and/or any other defining display characteristics of video signals that is currently standardized or maybe standardized. Further note that an image input layer corresponds to a window, a background and/or a display area of a display, where the display is capable of presenting more than one image, where the images originate from different video and/or graphics data sources (e.g., a television signal, and a computer application display).

Abstract: The present invention relates to filtering an interlaced input digital signal containing fields of chrominance information preparatory to converting the format of the signal by means of a downsampling conversion from a 4:2:2 format to a 4:2:0 format. In the invention, the input signal is applied to a delay circuit to derive samples of the input signal representing spatially separated elements from each chrominance field where the spatial separation is of one line. The magnitudes of the samples are compared relative to one another to identify frequencies which fall within different high and low frequency ranges. An adaptive filter has a plurality of frequency responses corresponding to the frequency ranges and a frequency response is selected in accordance with the identified frequency range of the input signal samples.

Abstract: A method of transmission of wide bandwidth chroma signals converts a component video signal having a luminance and two half-bandwidth chroma components into a 0:4:4 video signal having no luminance component and two wide bandwidth chroma components. Half of the wide bandwidth chroma component samples are inserted into a standard serial digital data stream in place of the luminance component, and the second half of the wide bandwidth chroma component samples are inserted into the standard serial digital data stream in place of the two half-bandwidth chroma components.

Abstract: A method and circuit are provided for color space conversion of Y (luminance) and UV (chrominance) components from a planar YUV 4:2:0 format to an interleaved, or packed YUV 4:2:2 format, and from an interleaved, or packed YUV 4:2:2 format to a planar YUV 4:2:0 format. The method for both conversions includes reading source data, interpolating the sampled YUV component values, and performing a pass to thereby write the converted YUV component values in three passes, one pass for all values of the respective YUV components.

Abstract: It is an object of the present invention to provide a color conversion apparatus in which an output result of a color converting circuit at the succeeding stage for color-converting a specific color can be prevented from being affected by an output result of a color converting circuit at the preceding stage for color-converting a whole image. Since a first color converting circuit (10) color-converts a whole image of image data in a first color-conversion fashion.

Abstract: There is disclosed a method for converting color image data inputted from an image input apparatus to a color space which is not dependent on the apparatus and/or lighting with a high precision, the method comprising: setting a plurality of sets of a subject as a main constituting element of an image inputted from the image input apparatus, means for estimating color data which is not dependent on the apparatus and/or the lighting for each set, judging whether or not each pixel of the image data inputted from the image input apparatus belongs to the set of the subject, and selecting the estimating means based on a judgment result to estimate the color data which is not dependent on the apparatus and/or the lighting; learning a distribution of a specified object for each set in the color space after color conversion during color conversion of the image, performing tentative color conversion from an input image signal, and using the signal after the tentative color conversion to judge the set to which each pixe

Abstract: This invention relates to a video signal processing circuit for easily simultaneously performing conversion of the number of lines and format conversion with a simple construction and an image pickup apparatus such as CCD using the circuit. A signal in a 4:2:2 format is supplied to a linear interpolating unit. Input luminance signals and input color difference signals of one line are written into line memories and the input luminance signals and the input color difference signals of the next one line are written into other memories. Similarly, signals are alternately written. The input luminance signal is read twice from the above memories in a period of writing signals of one line. The obtained signals are multiplied by coefficients for linear interpolation, respectively, and the resultant signals are added, thereby generating a luminance signal to be outputted.

Abstract: In addition to linear conversion parameters V1 to V8 which are used in an interpolation calculation, non-linear conversion parameters VV1 to VV8 are calculated. Each time an input color is fetched, whether the linear conversion parameters are used or the non-linear conversion parameters are used is discriminated. The interpolation calculation of a high precision using the non-linear conversion parameters is performed for a region where it is necessary to guarantee a gradation, thereby preventing a reversal of an output color in a region including an achromatic gradation axis. Regions other than such a region are processed by the interpolation calculation using the linear conversion parameter at a high speed.

Abstract: A method and apparatus for converting the color base of an image input layer include processing that begins by interpreting a conversion flag. The processing then continues by converting the color base of the image input layer from a first color base to a second color base when the conversion flag indicates a color base conversion. Note that a color base corresponds to standardized colorometries of video signals, color space of video signals, and/or any other displaying characteristics of video signals that are standardized or may be subsequently standardized. Further note that an image input layer corresponds to a display or portion thereof (e.g., a window or a picture in picture), wherein the display is capable of presenting images from multiple video and/or graphics data sources (e.g., a television signal and a computer application).

Abstract: A method and system for capturing live video signal data using bufferless data compression is disclosed. Live video signal data is vertically scaled. A 4:2:2 to 4:2:0 color format conversion is performed simultaneous with the vertical scaling step. A one-dimensional bufferless discrete cosine transform is performed on the scaled live video signal data to create a plurality of scaled DCT coefficients. Each of the plurality of scaled DCT coefficients are then Huffman coded. Each of the Huffman encoded DCT coefficients may then be sent via a USB interface to a USB bus.

Abstract: A video signal format converting apparatus is provided for doubling a horizontal/vertical frequency, and converting the composition ratio of a luminance signal and color-difference signals, by which both horizontal/vertical frequency-converted and frequency-unconverted input signals can be processed. In this apparatus, external input signals not yet scan frequency-doubled and those scan frequency-doubled are controlled to be all processed. Thus, various input signals can be processed, and an external input signal not yet scan frequency-doubled can be processed even without installing a special scan conversion device.

Abstract: An apparatus for converting image format and methods thereof in a video signal processing system.

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: An apparatus and method for scaling-up a set of video data uses variations in the black-and-white components, of a graphic image to better generate “missing” color components in an image. The location of large variations in the black-and-white components of an image, or edges in the black-and-white portion of the image, may be used to generate the missing color components. The variations in the black-and-white components of an image, around a particular location in the image, provide additional information for interpolating between the more widely spaced color component information. The method and apparatus allow for the selection, and adjustment to, the weights given to edge locations. The method and apparatus may be used as part of a computer system to expand and display compressed graphic data.

Abstract: An apparatus for converting image format and methods thereof in a video signal processing system.

Abstract: A signal processing system 20 comprises a source 22 of video signals representing pixels in a first format (e.g. 4:4:4). The video signals are coarsely processed by a filter 43 and interpolator 44 and the processed signals are compared by a comparator 46 with the video signals. Depending on the result of the comparison either signals from the filter 43 or signals from a filter 30 are selected for output as video signals representing the pixels in a second format (e.g. 4:2:2).

Abstract: A method and system for capturing live video signal data using bufferless data compression is disclosed. Live video signal data is vertically scaled. A 4:2:2 to 4:2:0 color format conversion is performed simultaneous with the vertical scaling step. A one-dimensional bufferless discrete cosine transform is performed on the scaled live video signal data to create a plurality of scaled DCT coefficients. Each of the plurality of scaled DCT coefficients are then Huffman coded. Each of the Huffman encoded DCT coefficients may then be sent via a USB interface to a USB bus.

Abstract: A method for generating interlaced video signals representative of color images of a scene includes the following steps: deriving a progressively scanned luminance signal representative of the scene at a first frame rate; deriving interlaced scanned color component signals and a color-derived luminance component representative of the scene; high pass filtering and scan converting the luminance signal to obtain an interlaced detail luminance component; low pass filtering the interlaced color component signals and color-derived luminance component to obtain interlaced chrominance output signals and an interlaced low pass luminance component; and combining the detail luminance component and the low pass luminance component to obtain an interlaced luminance output signal.

Abstract: Device and method for decoding a television video signal are suggested. The device includes a tint controller and a color space converter. The tint controller converts a plurality of color space converting coefficients which is used for converting color space signals into R, G, B signals into tint considered coefficients having a tint control considered. On the other hand, the color space converter produces the R, G, B signal displayable on a monitor by using the tint considered coefficients from the tint controller and the color space signals.

Abstract: A method for scaling graphics image data. The method operates on data that is in red-green-blue format. Each component is filtered to extract high pass information and then that information is scaled in amplitude. Finally, the amplitude scaled information is recombined with the original components of the image data. The filtering and amplitude scaling sharpen the scaled image, producing a clearer picture.

Abstract: Dithering logic includes a number of programmable linear feedback shift registers (LFSRs), each configured to receive one of a number of color components (e.g., red-green-blue) of a video information signal as an input and to provide one of a number of dithered color components of the video information signal as an output. The dithered color components each include a greater number of bits than the color components. The LFSRs may be configured so that each LFSR includes a mask register configured to accept a characteristic polynomial. The dithering logic may be included in a set-top controller of a computer network that is organized to include a graphics processor communicatively coupled to the set-top controller. The dithering logic is thus configured to introduce pseudorandom noise into video information signals transmitted from the graphics processor to the set-top controller in accordance with one or more characteristic polynomials. Preferably, the characteristic polynomials are primitive polynomials.

Abstract: In a method and apparatus for converting digitized luminance-chrominance color space signals to digitized RGB color space signals, a first combining unit generates a plurality of predetermined linear combinations of the chrominance color space signals received by a multiplexed multiplication unit which includes no more than two look-up tables that contain digitized transformation values for performing matrix multiplications of the linear combinations of the chrominance color space signals. A second combining unit linearly combines the digitized transformation values outputted by the multiplexed multiplication unit and a predetermined binary combination of the luminance color space signal in a first predetermined manner to generate three RGB color combination signals. A third combining unit linearly combines the RGB color combination signals in a second predetermined manner to obtain the RGB color space signals.

Abstract: For a system having multiple sources of digital input data to be converted to analog by Digital to Analog Converters (DACs), pre-processing of the multiple sources of data is provided, such that differences in input sampling rates are accommodated. When multiple digital input sources are to be converted to analog signals in a single integrated circuit, these input signals are routed to a clock generator having Phase Locked Loop (PLL) circuitry and to respective Asynchronous Sample Rate Converters (ASRCs). Sample rate information relating to an input signal selected from among the multiple input signals is determined during a locking operation of the PLL. Based on the common clock output from the clock generator, the ASRCs convert the input signals to a single sampling rate. Once the multiple input sources are converted to a common sample rate by the ASRCs, the inputs are converted to analog signals by DACs using the common clock and are output by the single Integrated Circuit.

Abstract: A filter for downsampling input video having a first chrominance sampling to a second chrominance sampling. The input video has a Bitstream of data representing a sequence of picture frames, where each picture frame has a plurality of video lines. The filter has a means for choosing a downsampling mode from a list of available downsampling modes for the downsampling of the first chrominance sampling. The filter also has a means for dividing each picture frame into video line sets according to predetermined criteria for the particular downsampling mode chosen, where each video line set has at least two video lines. A means for assigning default downsampling coefficients for each of the video lines in the video line sets based upon the downsampling mode chosen is also provided in the filter. Lastly, the filter has a means for downsampling each video line set to a single video line having the second chrominance sampling.

Abstract: A method and system for capturing live video signal data using bufferless data compression is disclosed. Live video signal data is vertically scaled. A 4:2:2 to 4:2:0 color format conversion is performed simultaneous with the vertical scaling step. A one-dimensional bufferless discrete cosine transform is performed on the scaled live video signal data to create a plurality of scaled DCT coefficients. Each of the plurality of scaled DCT coefficients are then Huffman coded. Each of the Huffman encoded DCT coefficients may then be sent via a USB interface to a USB bus.

Abstract: A method and apparatus for dynamically blending a plurality of image input layers include processing that begins by determining color base (e.g., color space, colorimetries and/or any defining characteristics relating to the display of a video signal and/or graphics data) of each of a plurality of image input layers. An image input layer corresponds to a window, display area and/or background of a display capable of presenting separate images at one time, wherein the separate images originate from separate video and/or graphics sources. The processing continues by determining an output color base of an output, where the output color base corresponds to the color base capabilities of the video equipment (e.g., RGB output). The processing then continues by converting, for each of the plurality of image input layers that has a different color base than the output color base, the color base to match the output color base thereby producing converting image layers.