Composite Color Signal Patents (Class 348/702)
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Method for intuitively reproducing video contents through data structuring and the apparatus thereof
Patent number: 10186300Abstract: The present disclosure relates to a method for intuitively reproducing video contents through data structuring and the apparatus thereof, more specifically, which searches section by section the video contents edited and provided based on section with free search, hash tag, and/or bookmark, produces a new video contents from the searched sections of the video contents, and therefore promotes consumption of the video contents by providing reproduced video contents. The video contents can be edited and played by using a user interface intuitively figuring out the structure of video contents.Type: GrantFiled: June 21, 2016Date of Patent: January 22, 2019Assignee: VEAVER, INC.Inventors: Hyun Sun Ju, Hae Myung Choi, Byung Ho Choi -
Patent number: 10013263Abstract: System and methods are provided for an interactive help file for a host software user interface. According to one aspect, a host interface screen having actionable fields is provided and a first virtual button is generated and displayed on the host interface screen. The host interface screen is segmented into zones and, in response to activation of the first virtual button, a plurality of second virtual buttons are generated and displayed on the host interface screen. Following activation of a second virtual button, one or more help files are retrieved, and the host interface screen is transformed such that zones of the host interface screen that are not associated with the activated second virtual button are deactivated, the zone associated with the activated second virtual button is overlaid with a set of annotated links associated with help files, and the transformed host interface screen is displayed.Type: GrantFiled: February 17, 2016Date of Patent: July 3, 2018Inventor: Vincent Ramirez
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Patent number: 9641838Abstract: The moving image coding apparatus generates at least one motion prediction information for prediction-coding a coding target image of color components, for each color component, determines a correlation relationship of at least one motion prediction information of each of the generated color components, determines a color component which is to be a correction target, on the basis of a result of the determination of the correlation relationship, and corrects at least one motion prediction information of the determined color component using the motion prediction information corresponding to at least one color component among the other color components.Type: GrantFiled: December 4, 2013Date of Patent: May 2, 2017Assignee: CANON KABUSHIKI KAISHAInventor: Eishi Takeda
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Patent number: 9305501Abstract: A method to drive a display device includes: transmitting at least one data voltage to one or more of a plurality of data lines, scanning one or more of a plurality of gate lines to enable transmission of a gate signal in association with a first frame of a first hold section of a first still image section associated with display of a still image, and scanning one or more of the plurality of gate lines to enable transmission of the gate signal every frame of a first refresh section. The first still image section comprises the first refresh section.Type: GrantFiled: November 5, 2012Date of Patent: April 5, 2016Assignee: Samsung Display Co., Ltd.Inventors: Yong-Jun Choi, Hyun Seok Ko, Po-Yun Park, Min Joo Lee, Jung-Hwan Cho
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Patent number: 9177514Abstract: An image display apparatus operates in field sequence mode which effectively reduces the generation of color break. A color break strength calculating unit determines a color break strength that indicates the noticeability of the generation of the color break. A light-source signal generating unit controls each light source so that as the color break strength of a color mixed component having the highest color break strength is higher, the color mixed component is contained more in light output from a light-source unit during the extension subframe period. If there is present a first pixel region as an area including one or more pixel formation regions where an image containing the component of interest is displayed, the color break strength of the component of interest increases more as a magnitude of the component of interest is larger in the first pixel region.Type: GrantFiled: January 16, 2012Date of Patent: November 3, 2015Assignee: SHARP KABUSHIKI KAISHAInventor: Tomoyuki Ishihara
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Patent number: 9171370Abstract: According to example embodiments, a method for deinterlacing an image having a plurality of pixels, the method comprising: calculating a difference between a first pixel of the image and each pixel of at least one pixel pair, each pixel pair comprising one pixel being positioned above the first pixel and another pixel being positioned below the first pixel; and deinterlacing the first pixel only if at least one difference corresponding to a pixel pair exceeds a predefined threshold. A corresponding apparatus and computer program product are also provided.Type: GrantFiled: October 20, 2011Date of Patent: October 27, 2015Assignee: Agency for Science, Technology and ResearchInventors: Zaw Min Oo, Kok Seng Aw, Kwong Huang Goh, Jo Yew Tham, Wei Siong Lee
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Patent number: 9030610Abstract: High definition media content processing techniques are described in which enhanced media content rendering techniques may be performed to output high definition media content. In an implementation, luma keying may be provided to define clear pixels in a composite output using an optimum set of graphics processing instructions. In another implementation, techniques are described which may provide clear rectangles in a composite output of one or more video streams. Clear rectangles to appear in the composite output are configured by a media playback application. A texture is arrived at to represent a union of each of the clear rectangles and is applied to form the clear rectangles in the composite output. In another implementation, capture techniques are described in which an image to capture is resolved as strips to an intermediate texture and then from the texture to a capture buffer in system memory.Type: GrantFiled: March 31, 2014Date of Patent: May 12, 2015Assignee: Microsoft Technology Licensing, LLCInventors: Stephen Estrop, Matthew C. Howard
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Patent number: 8665286Abstract: Teachings herein compose a digital image so that the image is perceptible on a viewing surface, such as a projection surface or a transparent screen. In doing so, the teachings advantageously recognize a digital image as consisting of one or more logical objects, like buttons of a user interface. Often, logical objects may be spatially arranged within the image and/or colored in different possible ways without substantially affecting the meaning conveyed by the image. Exploiting this, teachings herein evaluate light reflected from, or transmitted through, the viewing surface, and compose the digital image from one or more logical objects that have a spatial arrangement or coloration determined in dependence on that evaluation. The teachings might, for example, place a logical object within the image so that it will be displayed on a region of the surface which has high contrast with the object's colors and/or low color variance.Type: GrantFiled: August 12, 2010Date of Patent: March 4, 2014Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Harald Gustafsson, Jan Patrik Persson, Per Persson
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Publication number: 20130113999Abstract: A method, system and computer-readable media for detecting scene changes in a video that includes providing by one or more computing devices a plurality of passes through the video where a plurality of detected scenes from a first pass in a conventional method are identified and a second pass through the detected scenes are provided by the computing device. A plurality of scene boundary differences corresponding to the detected scenes, a fixed average, and a varying average are computed by the computing device. The scene boundary difference is compared with the fixed average and the varying average and if the scene boundary difference is less than the fixed average and the varying average, the detected scenes are combined else the detected scene being an abrupt scene change is determined. The steps of computing a varying average to combining the detected scenes are repeated by the computing device.Type: ApplicationFiled: November 3, 2011Publication date: May 9, 2013Applicant: INFOSYS TECHNOLOGIES, LTD.Inventors: Aditya Vashistha, Rajarathnam Nallusamy, Sanjoy Paul
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Patent number: 8330871Abstract: A method for detecting motion in an image display device includes receiving a plurality of composite signals having luminance signals and chrominance signals corresponding to a plurality of frames, determining luminance motion factors of the plurality of frames according to the luminance signals of the plurality of composite signals, determining chrominance motion factors of the plurality of frames according to edge intensities of the plurality of frames and the chrominance signals of the plurality of composite signals, and determining motion factors of the plurality of frames according to the luminance motion factors and the chrominance motion factors.Type: GrantFiled: April 3, 2007Date of Patent: December 11, 2012Assignee: NOVATEK Microelectronics Corp.Inventors: Teng-Yi Lin, Chuan-Lung Huang
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Patent number: 8265464Abstract: Methods, apparatus and products for administering a time-shifting cache in a media playback device are disclosed, where the media playback device receives from a digital media provider a digital media stream of digital media content and administering the time-shifting cache includes caching the digital media content of the digital media stream in the time-shifting cache; dynamically identifying one or more non-preferred segments of the cached digital media content; and managing the time-shifting cache in dependence upon the identified non-preferred segments.Type: GrantFiled: February 26, 2009Date of Patent: September 11, 2012Assignee: International Business Machines CorporationInventor: James G. McLean
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Patent number: 7974516Abstract: Provided are apparatuses and methods for reproducing a data structure for managing reproduction of still images recorded on a recording medium. In the recording medium, a data area stores at least first and second still images and a playlist area stores at least one playlist. The playlist includes mark information, and the mark information provides presentation information on the first and second images to allow for at least skipping from reproducing the first image to reproducing the second image.Type: GrantFiled: September 3, 2003Date of Patent: July 5, 2011Assignee: LG Electronics Inc.Inventors: Kang Soo Seo, Sung Wan Park, Byung Jin Kim, Soung Hyun Um
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Patent number: 7932936Abstract: A system that automatically adjusts a threshold value of cross color suppression and a method thereof are disclosed. The system includes a cross color suppression unit, a statistical unit and an adjustment unit. The cross color suppression unit is for receiving input video data and searching a plurality of cross color dots thereof. According to a threshold value, the cross color suppression unit determines whether the cross color dot is static or dynamic, suppresses the static cross color dot and then generates an output video data. The method used by the present invention is, the statistical unit calculates residual cross color amount of the output video data that has been suppressed. Then, the adjustment unit compares the cross color amount of the output video data with a reference value so as to send a corresponding adjustment signal to the cross color suppression unit to adjust the threshold value.Type: GrantFiled: September 27, 2007Date of Patent: April 26, 2011Assignee: Realtek Semiconductor Corp.Inventors: Bing-Jhe Chen, Po-Wei Chao
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Patent number: 7925106Abstract: A motion detection apparatus detecting motion in an image may include a black-and-white signal motion detector, a first color signal motion detector, a second color signal motion detector, and a final motion flag output unit. The motion detection apparatus may output a final motion flag in accordance with whether there is motion in a black-and-white image, whether there is first color motion in a color image, and whether there is second color motion in the color image. The motion detection apparatus may control a threshold value used to determine whether there is motion in an image in the present frame in response to accumulated information about whether there has been motion in the image for a predetermined past frame through to the previous frame.Type: GrantFiled: May 17, 2007Date of Patent: April 12, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Mi-kyoung Seo, Sung-cheol Park, Jae-hong Park, E-woo Chon
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Patent number: 7912284Abstract: A method of filtering video packets for video stream monitoring is provided. A video packet of a video stream is received. One or more features are extracted from a specified frame of the video packet via one or more histograms and frequency domain coefficients of the specified frame. One or more concept detectors are implemented on the one or more features creating one or more confidence values. The confidence values are transmitted to a display module for filtering of video packets.Type: GrantFiled: May 13, 2008Date of Patent: March 22, 2011Assignee: International Business Machines CorporationInventors: Lisa Dronette Amini, Ching-Yung Lin, Olivier Verscheure
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Publication number: 20100302453Abstract: A technique is disclosed for detecting gradual transitions between frames of a video sequence such as fade and dissolve transitions. For each frame, the intensity values of pixels at corresponding positions within a window of frames including the subject frame are compared, and signs are allocated to the calculated differences. The number of each type of sign is determined for each pixel position and the larger number of matching signs is assigned as a measure of the monotonicity of the direction of intensity variations at the pixel position between the frame and the surrounding frames. A global monotonicity measure is then calculated for the frame as a whole using the monotonicity values for each pixel position. This is repeated for each frame to generate a temporal sequence of frame intensity change monotonicity measures. Slopes within this temporal sequence representative of gradual Transitions between video frames are detected.Type: ApplicationFiled: October 5, 2007Publication date: December 2, 2010Inventors: Stavros Paschalakis, Daniel Simmons
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Publication number: 20100166083Abstract: A method for modulating mark (20) within content signal (18) that has frames, where each of the frames has content lines and one or more measurable parameters, where each of the content lines has pixels, and where each of the pixels has a value, the method comprising selecting framesets from among the frames of the content signal; modulating at least two of the framesets; and causing mark (20) to be present within content signal (18) by at least modulating at least two of the framesets.Type: ApplicationFiled: December 28, 2009Publication date: July 1, 2010Inventors: Christopher E. Chupp, Michael S. Gramelspacher, Gary A. Lorden
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Patent number: 7734144Abstract: A method and apparatus for editing a source video that has already been taken to stabilize images in the video. To eliminate jerky motion from a video, changes in shots are first detected. Then, any jerkiness within the video of that shot is classified and the video is segmented further into smaller segments based on this classification. The jerkiness within the selected segments is removed. The corrected shot, comprising a plurality of frames, is then added to the preceding shot until all shots of the video have been appropriately corrected for jerkiness. To help the user identify the shots being edited, keyframes or snapshots of the shots are displayed, thereby allowing the user to decide whether processing of the shot is desired and which shots should be incorporated into the final video.Type: GrantFiled: October 30, 2002Date of Patent: June 8, 2010Assignee: Koninklijke Philips Electronics N.V.Inventors: Nevenka Dimitrova, Radu S. Jasinschi
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Patent number: 7710502Abstract: A method and apparatus for blending a video signal responsive to a chroma motion result is disclosed. The method and apparatus are configured to determine whether any chroma motion exists within the video signal and providing the chroma motion result, to provide a first blending signal based on the chroma motion result; to provide a second blending signal based on the chroma motion result; to modulate temporal filtered luma and chroma components of the video signal with the first blending signal, to modulate spatial filtered luma and chroma components of the video signal with the second blending signal, and to add the modulated temporal luma and chroma signals to the modulated spatial luma and chroma signals to provide a blended video signal.Type: GrantFiled: March 17, 2006Date of Patent: May 4, 2010Assignee: Zoran CorporationInventors: Yee Shun Chan, Dennis Kin-Wah
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Patent number: 7676821Abstract: Method and related system for detecting advertising sections of video signal. The invention is capable of integrating detecting results based on different detecting rules, which includes detecting discontinuity of frame images in the video signals, detecting occurrences of frames with specific images, detecting occurrences of repeated frames, and detecting audio divisions in the video signal. Detecting results of these detecting rules are integrated by weighting them according to their accuracy, such that occurrence of advertising can be located.Type: GrantFiled: October 19, 2004Date of Patent: March 9, 2010Assignee: VIA Technologies Inc.Inventor: Andy Chiu
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Publication number: 20100039565Abstract: A scene change detector provides automatic detection of scene changes by utilizing frame-to-frame differences in chrominance components of video frames analyzed for information content.Type: ApplicationFiled: August 17, 2009Publication date: February 18, 2010Inventor: Patrick Seeling
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Publication number: 20090268096Abstract: A video processing method for determining a target motion vector includes generating a plurality of candidate temporal matching differences according to data of different color components in a specific color system and determining a vector associated with a minimum temporal matching difference from the candidate temporal matching differences as the target motion vector. A film mode detection method includes generating a plurality of candidate frame differences from a plurality of received frames according to data of different color components in a specific color system and performing film mode detection according to the candidate frame differences.Type: ApplicationFiled: April 28, 2008Publication date: October 29, 2009Inventors: Siou-Shen Lin, Te-Hao Chang, Chin-Chuan Liang
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Patent number: 7561210Abstract: The present invention discloses a variable-field motion detector having access to a plurality of video fields of an interlaced video signal for detecting a motion situation of an image area in the interlaced video signal. The variable-field motion detector includes: a plurality of pixel difference circuits each for computing a detection value according to the difference between the pixel values of a single pixel in two different video fields; a decision circuit coupled to the pixel difference circuits for determining the motion situation of the image area according to the detection values; and a field-number adjuster for adjusting the pixel difference circuits and/or the decision circuit to eliminate the effect of some video fields according to a detection number.Type: GrantFiled: September 6, 2007Date of Patent: July 14, 2009Assignee: Mediatek Inc.Inventor: Yuan-Chung Lee
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Patent number: 7535515Abstract: Methods and apparatus, including computer program products, implementing and using techniques for distinguishing false motion from true motion, in a video signal that is received by a television set. The video signal is received at the television set. The video signal includes a luma component and a chroma component. A motion detection operation is performed for each of the chroma component and the luma component in several frequency regions of the received video signal. Each frequency region has a unique, adjustable threshold value for distinguishing false motion from true motion, that is dynamically adjustable based on the incoming video signal, and as a result the motion detection accuracy is improved and image artifacts are minimized in an image that is described by the video signal and is to be displayed on the television set.Type: GrantFiled: November 10, 2004Date of Patent: May 19, 2009Inventors: Ravi Ananthapur Bacche, Xu Dong
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Publication number: 20090027560Abstract: An image signal processor and a method for processing an image signal thereof are disclosed. The image signal processor stores a difference of image signals between a current frame and a previous frame, determines whether the input signal is a moving image or a still image by comparing the difference of image signals between the current frame and a frame prior to the previous frame, and filters the image signals employing a 2D comb filter or 3D comb filter. As a result, a filtering is executed using comb filters proper to a moving image and a still image.Type: ApplicationFiled: January 18, 2008Publication date: January 29, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventor: Eun-kyung PARK
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Patent number: 7477833Abstract: An information processing apparatus includes a generating unit for generating ClipMark formed by a mark specifying a characteristic picture extracted from an input AV stream, as management information for supervising the AV stream, and for generating PlayListMark, formed by marks pointing to a picture optionally specified by a user, from a reproduction domain corresponding to the PlayList defining the combination of preset domains in the AV stream, and a recording unit for recording the ClipMark and PlayListMark as respective independent tables on a recording medium. With the information processing apparatus, it is possible to access a desired location of an AV stream promptly and reliably.Type: GrantFiled: April 20, 2001Date of Patent: January 13, 2009Assignee: Sony CorporationInventors: Motoki Kato, Toshiya Hamada
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Patent number: 7453525Abstract: Systems and methods are provided for detecting motion within a composite video signal. A first chroma difference element compares an in-phase chroma component of the composite video signal to a delayed representation of the in-phase chroma component to produce a first chroma difference value for a given pixel. A second chroma difference element compares a quadrature chroma component of the composite video signal to a delayed representation of the quadrature chroma component to produce a second chroma difference value for the pixel. A parameter mapping component maps the first and second difference values to respective first and second motion parameters that indicates the degree of change in the chroma properties of the pixel. A parameter selector determines a composite motion parameter for the pixel from the first and second motion parameters.Type: GrantFiled: May 24, 2005Date of Patent: November 18, 2008Assignee: Texas Instruments IncorporatedInventors: Karl Renner, Weider Peter Chang, Ramesh M. Chandrasekaran
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Publication number: 20070268412Abstract: A motion detection apparatus detecting motion in an image may include a black-and-white signal motion detector, a first color signal motion detector, a second color signal motion detector, and a final motion flag output unit. The motion detection apparatus may output a final motion flag in accordance with whether there is motion in a black-and-white image, whether there is first color motion in a color image, and whether there is second color motion in the color image. The motion detection apparatus may control a threshold value used to determine whether there is motion in an image in the present frame in response to accumulated information about whether there has been motion in the image for a predetermined past frame through to the previous frame.Type: ApplicationFiled: May 17, 2007Publication date: November 22, 2007Inventors: Mi-kyoung Seo, Sung-cheol Park, Jae-hong Park, E-woo Chon
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Patent number: 6738100Abstract: A system and method that processes video to extract a keyframe-based adequate visual representation. The method utilizes a hierarchical processing technique. The first stage in the hierarchy extracts a chromatic difference metric from a pair of video frames. An initial set of frames is chosen based on the chromatic metric and a threshold. A structural difference measurement is extracted from this initial set of frames. A second threshold is used to select key frames from the initial set. The first and second thresholds are user selectable. The output of this process is the visual representation. The method is extensible to any number of metrics and any number of levels.Type: GrantFiled: December 20, 2000Date of Patent: May 18, 2004Assignee: Virage, Inc.Inventors: Arun Hampapur, Mojgan Monika Gorkani, Chiao-Fe Shu, Amarnath Gupta
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Publication number: 20020113903Abstract: A method for managing a frame of data includes capturing the frame of data from an image at a location. It is determined whether the image is a new image. The frame of data is displayed if the image is the new image.Type: ApplicationFiled: July 28, 1998Publication date: August 22, 2002Inventors: BRADFORD H. NEEDHAM, DANIEL A. TEIBEL
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Patent number: 6380973Abstract: An image in a field inputted by interlace scanning is delayed for a time period corresponding to one field, then, by comparing the delayed image signals and the not-delayed image signals of the image, a movement detecting unit determines whether the input image is a moving image or a still image and outputs a signal indicating the determined result. A selecting unit which includes an image combining unit combines the delayed image signals and the not-delayed image signals, and selects either the combined image signals or not-combined image signals on the basis of the detected result by the movement detecting unit. Accordingly, the image signals realizing a high quality image displayed on a multimedia device are obtained.Type: GrantFiled: May 28, 1996Date of Patent: April 30, 2002Assignee: Canon Kabushiki KaishaInventor: Norihiro Kawahara
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Patent number: 6014183Abstract: The present invention relates to a device which monitors a digitized video data stream and detects when scene changes occur in the video stream. The present invention detects scene changes by comparing from frame-to-frame each of the pixel colors within the frame. When a high degree of change in pixel color from one frame to the next is detected, this is identified as a scene change. The system of the present invention does not obtain the digitized video data stream by polling a hardware analog-to-digital converter. In order to ensure that the present invention is compatible with any input video source, the present invention does not request data directly from the hardware video digitizing card. Instead, the input video may be displayed upon a computer monitor in any manner, such as by the operating system of the computer.Type: GrantFiled: August 6, 1997Date of Patent: January 11, 2000Assignee: Imagine Products, Inc.Inventor: Toan Q. Hoang
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Patent number: 5680179Abstract: A device for filtering video images, of the type which includes first and second circuit portions, each having first and second input terminals respectively adapted to receive digitalized luminance and chrominance components of a television signal, and an output terminal coinciding with an output terminal of the device. The first and second circuit portions further include first, second and third filters, cascade coupled to one another, and a fourth filter, respectively.The first, second and third filters incorporate a computational circuit which uses a logic of the fuzzy type to process the digitalized luminance component. The fourth filter includes a computational circuit which processes the digitalized chrominance components based upon a parameter supplied from the second filter.Type: GrantFiled: September 27, 1995Date of Patent: October 21, 1997Assignee: SGS-Thomson Microelectronics S.r.l.Inventors: Viviana D'Alto, Massimo Mancuso, Rinaldo Poluzzi, Gianguido Rizzotto
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Patent number: 5473441Abstract: Both a sharp print image and a natural reproduced move image can be obtained from a signal recorded on a recording medium. A recording signal, read from the recording medium, is converted into digital data and is delayed by one field. Data representing the current image in the n-th field and data representing an image in the (n-1)-th field one field ahead of the current image, are applied to a subtracting circuit, to extract a component representing moving image portions. An interpolated image for making movement correction is created from the extracted component representing the moving image portions by an interpolating circuit. Data representing the interpolated image and the data representing the current image in the n-th field are synthesized by a synthesizing circuit, to output composite data as data representing an image which has been subjected to movement correction.Type: GrantFiled: June 9, 1993Date of Patent: December 5, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Masafumi Inuiya, Kazuyuki Masugane
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Patent number: 5469227Abstract: In a video processing system having an intra-field processing mode which allows a better luminance-chrominance separation, and an inter-field processing mode which allows a better performance in the presence of motion in the color signals, wherein a motion-dependent choice is made between these modes, chrominance-difference signals (Ud, Vd) are derived from chrominance signals (U, V), and a first linear combination of the chrominance-difference signals (Ud', Vd) is derived when the V chrominance-difference signal (Vd) exceeds the U chrominance-difference signal (Ud'), and a second linear combination of the chrominance-difference signals (Ud', Vd) is derived in the opposite case, to obtain a motion signal (M) for the motion-dependent choice.Type: GrantFiled: November 4, 1993Date of Patent: November 21, 1995Assignee: U.S. Philips CorporationInventors: Jan S. Misker, Theodora L. Hamann, Leendert T. Rozendaal
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Patent number: 5430500Abstract: A motion detector detects a motion of a video signal by a simple circuit arrangement with high accuracy.Type: GrantFiled: May 3, 1994Date of Patent: July 4, 1995Assignee: Sony CorporationInventors: Takaya Hoshino, Hiroyuki Kita, Toshio Sarugaku, Mamoru Kanou
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Patent number: 5374959Abstract: For obtaining motion information by using a conventional motion estimator, a composite signal obtained from both the luminance signal and the chrominance signal is applied to this motion estimator. Based on the signals (Cb, Cr) of the two chrominance components (U, V), the contour of the colored elements of the image is extracted by means of Sobel filters (9, 10), i.e. high-pass two-dimensional filters, and the output signals of these filters are added to the luminance signal (2) in an adder (14), the resultant signal (3) being applied to the motion estimator.Type: GrantFiled: September 21, 1993Date of Patent: December 20, 1994Assignee: U.S. Philips CorporationInventor: Jean-Christophe Sahakian
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Patent number: 5373329Abstract: A method of detecting a digital color picture movement signal precisely and economically for three-dimensional processing for the purpose of improving TV and VTR picture quality comprises the steps of detecting the differential between the brightness signals of an input digital color picture signal and the preceding picture delayed one frame period, of detecting in the input signal brightness signal components having frequencies in the vicinity of the color subcarrier frequency, and of allowing the passage of the brightness signal having components in the higher frequency range of the color subcarrier frequency.Type: GrantFiled: February 10, 1992Date of Patent: December 13, 1994Assignee: NEC CorporationInventor: Shigeo Niitsu