Abstract: A method and system for detecting the motion between a video field and its previous and subsequent video fields at a specified position. The motion detection scheme and system allows signal values of one set of vertically adjacent pixels from a video field of one parity and two other sets of vertically adjacent pixels from two neighboring video field of opposite parity to be measured such that when taken together, these pixels represent relevant sample of an image near the vertically and temporal position of the video field. The motion detection scheme also allows the calculation of three motion values between the video field and its previous video field, the video field and its subsequent video field and the previous and subsequent fields of the same video field. The overall level of motion at the field being measured is determined by combining the information from the three motion values calculated at the specified spatial and temporal location.

Abstract: A system for calibrating a display device to improve its perceived image quality includes a calibration module configured to determine, for each of a plurality of white colors associated with a plurality of gray levels, a measured chromaticity point on a chromaticity diagram and a measured luminance level. The calibration module calculates, for each gray level, a differential change in each primary color component that simultaneously moves the measured chromaticity point to a target chromaticity point and adjusts the measured luminance level to a target luminance level on a predetermined luminance curve having a target gamma value, and calculates correction values for each primary color component and each gray level based on the calculated differential changes. The system also includes means for outputting the calculated correction values to the display device, which corrects the primary color components of a color video signal based on the calculated correction values.

Abstract: A method for automatically adjusting chrominance data of an input pixel from a color video signal includes receiving and temporarily storing the chrominance data of the input pixel in a transmission format comprising a color difference representation and converting the chrominance data from the color difference representation in Cartesian coordinates to color hue and color saturation representation in polar coordinates such that color attributes of the input pixel can be analyzed according to hue and saturation values. The method also includes determining a hue adjustment value and a saturation adjustment value based on the color hue value and color saturation value associated with the chrominance data, applying the hue adjustment and the saturation adjustment directly to the chrominance data in its transmission format, and outputting the adjusted chrominance data to an output color video signal.

Abstract: An image scaling system for converting a sampling rate of an input video signal comprising input pixel data to produce a magnified or reduced output video image comprising output pixel data includes a first one-dimensional image scaler comprising a single-stage finite-duration impulse response (FIR) filter structure with poly-phase filter responses that receives and scales the input pixel data by a scaling factor in either a horizontal or vertical direction to produce output pixel data and a second one-dimensional image scaler comprising a single-stage FIR filter structure that is coupled in tandem to the first one-dimensional image scaler and scales by the scaling factor the output pixel data from the first one-dimensional image scaler in a direction perpendicular to that of the first one-dimensional image scaler to produce the magnified or reduced output video image.

Abstract: When a video display system displays an image having an aspect ratio that differs from the aspect ratio of the system's display monitor, the image spans only an “active” portion of the available display area on the monitor. The display system sets the luminance and/or chrominance of pixels in the inactive areas of the monitor to match the average luminance and/or chrominance of a selected group of pixels forming the image in the active area. This helps prevent ghosting by aging the phosphors or other material forming the pixels in the active and inactive areas at the same rate.

Abstract: A method for determining a value for a missing target pixel in an interlaced video field during a de-interlacing process includes providing at least one lookup table that correlates motion data to at least one of a plurality of de-interlacing methods, generating motion data related to the missing target pixel, utilizing the related motion data to perform a lookup on the at least one lookup table, and selecting the at least one de-interlacing method correlated to the motion data to generate the value for the missing target pixel.

Abstract: An image brightness and contrast management module for automatically adjusting brightness and contrast of an input video signal includes a histogram generation unit that generates a pixel luminance histogram based on pixel luminance values in a frame, whereby the histogram shows a distribution of luminance values in the frame and indicates the dynamic range and the dominant luminance value(s) for the frame. The module includes a histogram characterization unit that uses the pixel luminance histogram to identify which of a plurality of brightness/contrast properties is exhibited in the frame. The module also includes a brightness and contrast adjustment unit that nonlinearly adjusts, in real-time, the pixel luminance values in a next frame based on the identified brightness/contrast properties exhibited in the preceding frame.

Abstract: A method for de-interlacing an interlaced video signal includes generating a per-field motion pattern set for a subject video field, where the motion pattern set comprises a same-parity motion pattern and an opposite-parity motion pattern pair, providing a plurality of progressive mode pattern pairs, where each progressive mode pattern pair is unique and characteristic of one of a plurality of progressive frame-to-interlaced field conversion techniques, and comparing the same-parity and opposite-parity motion pattern pair for the subject video field with each progressive mode pattern pair to determine whether the subject video field is derived from a progressive source and to identify the progressive frame-to-interlaced field conversion technique used. Based on the comparison, a field-merging de-interlacing technique or a per-pixel de-interlacing technique is utilized to de-interlace the subject field to produce a progressive video signal.

Abstract: A method for determining a value for a missing target pixel in an image frame includes generating a classification index from a plurality of classification pixels in a classification window associated with the missing target pixel where the classification index indicates whether a recognizable pattern is detected in the classification window, using the classification index to select a filter index via a lookup table associated with the classification index, using the selected filter index to select a set of filter coefficients via a lookup table associated with the filter index, and calculating the value for the missing target pixel using the selected set of filter coefficients.

Abstract: An image scaling system for converting a sampling rate of an input video signal comprising input pixel data to produce a magnified or reduced output video image comprising output pixel data includes a first one-dimensional image scaler comprising a single-stage finite-duration impulse response (FIR) filter structure with poly-phase filter responses that receives and scales the input pixel data by a scaling factor in either a horizontal or vertical direction to produce output pixel data and a second one-dimensional image scaler comprising a single-stage FIR filter structure that is coupled in tandem to the first one-dimensional image scaler and scales by the scaling factor the output pixel data from the first one-dimensional image scaler in a direction perpendicular to that of the first one-dimensional image scaler to produce the magnified or reduced output video image.

Abstract: A system for calibrating a display device to improve its perceived image quality includes a calibration module that is configured to determine, for each of a plurality of white colors associated with a plurality of gray levels displayed sequentially by the display device, a measured chromaticity point on a chromaticity diagram and a measured luminance level. The calibration module calculates, for each gray level, a differential change in each primary color component that simultaneously moves the measured chromaticity point to a target chromaticity point and adjusts the measured luminance level to a target luminance level on a predetermined luminance curve having a target gamma value, and calculates correction values for each primary color component and each gray level based on the calculated differential changes. The system also includes means for outputting the calculated correction values to the display device.

Abstract: An image brightness and contrast management module for automatically adjusting brightness and contrast of an input video signal includes a histogram generation unit that generates a pixel luminance histogram based on pixel luminance values in a frame, whereby the histogram shows a distribution of luminance values in the frame and indicates the dynamic range and the dominant luminance value(s) for the frame. The module includes a histogram characterization unit that uses the pixel luminance histogram to identify which of a plurality of brightness/contrast properties is exhibited in the frame. The module also includes a brightness and contrast adjustment unit that nonlinearly adjusts, in real-time, the pixel luminance values in a next frame based on the identified brightness/contrast properties exhibited in the preceding frame.

Abstract: A method for automatically adjusting chrominance data of an input pixel from a color video signal includes receiving and temporarily storing the chrominance data of the input pixel in a transmission format comprising a color difference representation and converting the chrominance data from the color difference representation in Cartesian coordinates to color hue and color saturation representation in polar coordinates such that color attributes of the input pixel can be analyzed according to hue and saturation values. The method also includes determining a hue adjustment value and a saturation adjustment value based on the color hue value and color saturation value associated with the chrominance data, applying the hue adjustment and the saturation adjustment directly to the chrominance data in its transmission format, and outputting the adjusted chrominance data to an output color video signal.

Abstract: When a video display system displays an image having an aspect ratio that differs from the aspect ratio of the system's display monitor, the image spans only an “active” portion of the available display area on the monitor. The display system sets the luminance and/or chrominance of pixels in the inactive areas of the monitor to match the average luminance and/or chrominance of a selected group of pixels forming the image in the active area. This helps prevent ghosting by aging the phosphors or other material forming the pixels in the active and inactive areas at the same rate.

Abstract: A method and system for detecting the motion between a video field and its previous and subsequent video fields at a specified position. The motion detection scheme and system allows signal values of one set of vertically adjacent pixels from a video field of one parity and two other sets of vertically adjacent pixels from two neighboring video field of opposite parity to be measured such that when taken together, these pixels represent relevant sample of an image near the vertically and temporal position of the video field. The motion detection scheme also allows the calculation of three motion values between the video field and its previous video field, the video field and its subsequent video field and the previous and subsequent fields of the same video field. The overall level of motion at the field being measured is determined by combining the information from the three motion values calculated at the specified spatial and temporal location.

Abstract: A cable includes a plurality of twisted pairs of conductors in a dense hexagonal matrix-like form defining thereof horizontal rows and oblique columns with each other in a rectangular coordinate system wherein the twisted pairs in the same row have the same twist direction while having opposite twist directions with those in the two neighboring rows aside, and wherein for each row there is a ninety degrees phase shift between every adjacent two pairs and for each column there is a non-ninety degrees phase shift between every adjacent two pairs.

Abstract: This invention is to provide a general equation for the round-flat twisted-pair cable arrangement to achieve maximum or any degree of crosstalk-noise cancellation in a short distance with the uniform twist of the individual twisted-pair and the uniform offset of the local twist shift angle for neighbor twisted pairs.

Abstract: A cable includes a plurality of twisted pairs of conductors in a dense hexagonal matrix-like form defining thereof horizontal rows and oblique columns with each other in a rectangular coordinate system wherein the twisted pairs in the same row have the same twist direction while have opposite twist directions with those in the two neighboring rows aside, and wherein for each row there is a ninety degrees phase shift between every adjacent two pairs and for each column there is a non-ninety degrees phase shift between every adjacent two pairs.

Abstract: A cable includes a plurality of twisted pairs of conductors in a dense hexagonal matrix-like form defining thereof horizontal rows and oblique columns with each other in a rectangular coordinate system wherein the twisted pairs in the same row have the same twist direction while having opposite twist directions with those in the two neighboring rows aside, and wherein for each row there is a ninety degrees phase shift between every adjacent two pairs and for each column there is a non-ninety degrees phase shift between every adjacent two pairs.

Abstract: A cable includes a plurality of twisted pairs of conductors in a dense matrix form defining columns and rows thereof in a rectangular coordinate system wherein the twisted pairs in the same row have the same twist direction while have opposite twist directions with those in the two neighboring rows aside, and wherein for each row there is a ninety degrees phase shift between every adjacent two pairs and for each column there is a ninety degrees phase shift between every adjacent two pairs.