Color Encoder Or Chrominance Signal Modulator Patents (Class 348/642)
  • Patent number: 10140728
    Abstract: An encoder includes a processor and a memory coupled thereto. A digital image to be encoded is stored in the memory. The digital image includes an array of pixels, with each pixel having an RGB color value associated therewith. Image filtering is performed on the digital image and includes calculating an RGB Euclidean geometric distance between a current pixel and a prior pixel, comparing the calculated RGB Euclidean geometric distance to a threshold, and changing the RGB color value of the current pixel to the same RGB color value as the prior pixel when the calculated RGB Euclidean geometric distance is less than the threshold. Run length encoding is performed on the filtered digital image.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: November 27, 2018
    Assignee: Citrix Systems, Inc.
    Inventor: Muhammad Dawood
  • Patent number: 9696962
    Abstract: The Harmonic Tracking Equalizer (HTEq) is an apparatus for and method of carrying out harmonic tracking equalization processing of an electrical signal, and apparatuses for and methods of controlling such equalization processing of the signal to dynamically sense the time-varying spectrum of an input signal and closely match a user desired audio signal spectrum while preserving the original dynamic range of the signal. The harmonically (sub-harmonically) tracked equalization is according to a user specified spectral request specified by a control interface that allows a user to request an amount of equalization to be applied to the signal. This apparatus is intended to process audio signals; though, it has general application to waveforms of other source and higher frequency content.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: July 4, 2017
    Inventor: David Yonovitz
  • Publication number: 20150138440
    Abstract: A display device includes a main signal processing circuit to which color video data is input, and a plurality of sub-signal processing circuits to which vide data for respective colors output by the main signal processing circuit are input. The main signal processing circuit generates information, which is used when each of the sub-signal processing circuits performs a predetermined process, based on information of a plurality of colors in the color video data input, and then outputs data representing the generated information to each of the sub-signal processing circuits together with the video data for the respective colors.
    Type: Application
    Filed: November 14, 2014
    Publication date: May 21, 2015
    Inventor: Yuki Ueda
  • Patent number: 8659614
    Abstract: An image display apparatus adapted to display an image based on an image signal input includes: a color adjustment circuit adapted to perform one of a modification process and a correction process individually on a hue signal, a lightness signal, and a saturation signal included in first HLS signals as an image signal, and output the processed signals as second HLS signals.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: February 25, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Fumio Koyama
  • Patent number: 8564647
    Abstract: Color correction of an autostereoscopic color display capable of displaying multiple views of one scene. Multiple viewing regions of the autostereoscopic color display are identified. The multiple viewing regions together comprise the whole of an operating viewing zone for the autostereoscopic color display. A respective plurality of color correction LUTs are constructed. At least one color correction LUT is constructed for each different viewing region. Color correction LUTs corresponding to current viewing regions are selected based on information regarding viewer location. The selected color correction LUTs are applied to the autostereoscopic color display.
    Type: Grant
    Filed: April 21, 2010
    Date of Patent: October 22, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Siu-Kei Tin
  • Patent number: 8525933
    Abstract: In an embodiment, a system generates multiple video streams. The system includes a color grading device and an appearance mapping device. The appearance mapping device operates on the data generated by the color grading device, and both the output of the color grading device and the output of the appearance mapping device may be displayed (and edited) simultaneously. In this manner, the efficiency of the editing process is improved.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: September 3, 2013
    Assignee: Dolby Laboratories Licensing Corporation
    Inventors: Robin Atkins, Anne Webster
  • Patent number: 8456576
    Abstract: A signal processing apparatus includes a lower-level region data detecting section detecting, in luminance data of an input video signal, luminance data corresponding to a value in a set lower-level region, and a data converting section converting a value of the luminance data corresponding to the lower-level region to a set conversion value.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: June 4, 2013
    Assignee: Sony Corporation
    Inventors: Tsutomu Ichinose, Takashi Sato
  • Patent number: 8451349
    Abstract: A device stores in ROM white spot addresses, white spot levels, an OB level median, sensitivity, and time-in-second under dark shooting, a temperature coefficient correcting the white spot level according to the temperature under normal shooting, a sensitivity coefficient for the sensitivity-based correction, and a time-in-second coefficient for the exposure time-in-second-based correction. A temperature difference during shooting a subject is obtained according to the difference between OB level median during normal shooting and that during dark shooting. A correction value for the white spot level due to temperature is obtained from temperature difference and temperature coefficient, and similarly, correction value due to sensitivity is obtained from sensitivity difference and sensitivity coefficient, and correction value due to time-in-second is obtained from time-in-second difference and time-in-second coefficient for correction.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: May 28, 2013
    Assignee: Nikon Corporation
    Inventor: Yoshizo Mori
  • Publication number: 20130057712
    Abstract: There is provided a signal transmitting device including a word puncturing controller configured to puncture per word a 1 ch 16-bit signal including 4:4:4 of r:g:b and including G, B and R signals of all samples, and map a 1 ch 16 bit-signal including 4:2:2 of r:g:b and including a G signal of all samples and B and R signals of even samples, and a 1 ch 16-bit signal including 0:2:2 of r:g:b and including B and R signals of odd samples without a G signal, a mapping controller, and a reading controller.
    Type: Application
    Filed: August 23, 2012
    Publication date: March 7, 2013
    Inventor: Shigeyuki YAMASHITA
  • Patent number: 8243201
    Abstract: The invention relates to a method and module for regulating saturation degree. In this method, a curvature of a special function in all position is regulated by a saturation parameter to obtain a regulated function. A color input signal is assigned as an independent variable of the regulated function to calculate a color output signal corresponding to the color input signal.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: August 14, 2012
    Assignee: ASUSTek Computer Inc.
    Inventor: Chi-Yi Tsai
  • Patent number: 8179478
    Abstract: A system for adjusting color image quality includes converting color video signal sources into component video signals including a luminance signal and chrominance signals. A signal axis rotation circuit performs coordination transformation on the chrominance signals in accordance with a hue calibration parameter; and a multiplier multiplies the coordinate-transformed chrominance signals with a chroma calibration parameter to obtain output chrominance signals. The output chrominance signals and the luminance signal together form a component chrominance signal, which is applied to and output by a chrominance signal inverse conversion unit.
    Type: Grant
    Filed: January 11, 2008
    Date of Patent: May 15, 2012
    Assignee: Vastview Technology, Inc.
    Inventors: Cheng-Chung Peng, Yuhren Shen
  • Publication number: 20110317073
    Abstract: Techniques are provided herein for receiving at a video processing device color video frames comprising grayscale components and color components. The grayscale components corresponding to each of the color video frames are extracted as each of the color video frames is received to obtain grayscale video frames. The grayscale video frames are transmitted at a first transmission rate. Color components for selected color video frames are periodically fused with selected grayscale video frames to obtain fused color video frames, and the fused color video frames are transmitted at a second transmission rate interspersed with the grayscale video frames transmitted at the first transmission rate.
    Type: Application
    Filed: June 28, 2010
    Publication date: December 29, 2011
    Applicant: RICHWAVE TECHNOLOGY CORP.
    Inventors: Chein-I Chang, Han-Jieh Chang, Yang-Lang Chang
  • Patent number: 8009963
    Abstract: This disclosure describes adaptive filtering techniques to improve the quality of captured imagery, such as video or still images. In particular, this disclosure describes adaptive filtering techniques that filter each pixel as a function of a set of surrounding pixels. An adaptive image filter may compare image information associated with a pixel of interest to image information associated with a set of surrounding pixels by, for example, computing differences between the image formation associated with the pixel of interest and each of the surrounding pixels of the set. The computed differences can be used in a variety of ways to filter image information of the pixel of interest. In some embodiments, for example, the adaptive image filter may include both a low pass component and high pass component that adjust as a function of the computed differences.
    Type: Grant
    Filed: March 16, 2006
    Date of Patent: August 30, 2011
    Assignee: QUALCOMM Incorporated
    Inventors: Prasanjit Panda, Khaled Helmi El-Maleh, Hsiang-Tsun Li
  • Publication number: 20100171883
    Abstract: A technique transfers data over a standard video transport, where this data may be in a nonstandard format or include control, audio, or other nonvideo data, or combinations of these. This standard video transport may be a DVI connection. The technique can increase the color depth by transferring high colors signals in a first packet and low colors signals in a second packet. The low and high color signals are combined to form a received pixel which is shown on a display of the display unit. For example, video with increased color depth and audio signals can be transferred over the standard video transport.
    Type: Application
    Filed: June 13, 2009
    Publication date: July 8, 2010
    Applicant: ELEMENT LABS, INC.
    Inventor: Grant Arthur John Elliott
  • Patent number: 7671926
    Abstract: Disclosed herein is a Radio Frequency (RF) modulator. The RF modulator includes a Chrominance-to-Luminance (C/L) delay compensation unit for receiving a video signal and compensating for a time delay between the chrominance and luminance signals of the video signal, and a modulation unit for receiving the video signal, which is compensated for by the C/L delay compensation unit, and an audio signal and converting the video and audio signal into a preset frequency-band RE signal. The C/L delay compensation unit and the modulation unit are packaged in a single package.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: March 2, 2010
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Jong Jin Lee, Chang Kap Nam, Ryo Young Mang
  • Publication number: 20100020242
    Abstract: The present invention relates to a video processing device comprising a luminance and saturation detector (LSHD) for detecting the luminance values (lum) and the saturation values (sat) of pixels of an input video signal (IN); and a white-point, saturation and hue modulator (WSH) for transforming luminance and saturation properties (lum, sat) of the pixels of the input video signal (IN) into white-point, saturation and hue correction factors (W, Wc; S, Sc; H, Hc).
    Type: Application
    Filed: November 20, 2007
    Publication date: January 28, 2010
    Applicant: NXP, B.V.
    Inventors: Matheus J. G. Lammers, Petrus M. De Greef
  • Publication number: 20090180028
    Abstract: A video processing system may be operable to utilize one-dimensional (1-D) piecewise linear (PWL) functions to adjust chroma and/or luma parameters corresponding to pixels that are determined to fall within one or more N-dimensional color adjustment regions in spatial representation of pixels' chroma and luma information. The chroma and/or luma parameters comprise Y, Cb, Cr, saturation and/or hue parameters in systems using Y?CbCr color coding. The 1-D PWL functions are operable to generate adjustment data corresponding to one of chroma and/or luma parameters, wherein the adjustment data comprise offset or gain data. The 1-D PWL functions are reprogrammable. The 1-D PWL functions may enable smooth transitions in boundary areas of at least some of the N-dimensional color adjustment regions. Determination of whether pixels fall within the color adjustment regions is based on a plurality of boundary points and/or criteria. Adjustment data corresponding to overlapped regions are aggregated.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 16, 2009
    Inventors: David Wu, Darren Neuman, Brian Schoner, Jaewon Shin
  • Publication number: 20090167954
    Abstract: A moving image processing circuit is provided includes: a decode processing unit configured to decode moving image data encoded by a predetermined compression method; an RGB conversion processing unit configured to convert the color space of the decoded moving image data to an RGB color space; a graphic processing unit configured to graphically process the moving image data whose color space is converted; and a control unit configured to control the decode processing unit, the RGB conversion processing unit and the graphic processing unit and select a frame leading to a drop frame.
    Type: Application
    Filed: December 22, 2008
    Publication date: July 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kyungwoon Jang, Kazuhiro Myoken, Hidenao Bito, Toshiya Takahashi
  • Publication number: 20090033794
    Abstract: According to one embodiment, a video signal processing apparatus includes a signal processor. The signal processor receives a digital video signal transmitted in a format conforming to a specific digital signal transmission standard to perform signal processing for video display. The signal processor selectively switches signal processing corresponding to a standard colorspace and signal processing exceeding the standard colorspace. A message is displayed such that a received digital video signal corresponds to a colorspace exceeding the standard colorspace, and the signal processor is set to a function of performing signal processing corresponding to the standard colorspace.
    Type: Application
    Filed: July 29, 2008
    Publication date: February 5, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Toshiyuki Arisaka
  • Patent number: 7376277
    Abstract: Color image transform coding methods and apparatus which take advantage of redundant information which is normally present in the luminance and chrominance components of a color image are described. The transform coding method of the present invention, can normally provide increased compression and/or better image quality at a given coding data rate than conventional JPEG or JPEG 2000 coding which does not use the transform of the present invention as part of the color component coding process. These benefits are normally achieved without generating more coefficients than would be generated in the case of more conventional coding such as JPEG or JPEG 2000 coding. In fact, the transform of the present invention can be applied to increase the coding efficiency of coding systems which perform spatial transforms and modeling and entropy coding operations of the type normally used in JPEG and/or JPEG 2000 coding systems.
    Type: Grant
    Filed: June 15, 2004
    Date of Patent: May 20, 2008
    Assignee: Pegasus Imaging Corporation
    Inventors: William Douglas Withers, Irina Popovici
  • Publication number: 20080068508
    Abstract: In a signal processing apparatus, when a luminance signal in a first numeric range is assigned to an integer value in a second range narrower than a first range representable by predetermined bits, and a luminance signal and color-difference signals are outputted under a predetermined standard in which a color-difference signal in a second numeric range is assigned to an integer value in a third range narrower than the first range, the luminance signal in the first numeric range is assigned to an integer value in a fourth range between the first and second ranges; the color-difference signal in the second numeric range is assigned to an integer value in a fifth range between the first and third ranges; and the fourth range is adjusted in a range between the first range and second range, and the fifth range is adjusted in a range between the first and third ranges.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 20, 2008
    Applicant: Sony Corporation
    Inventors: Tsutomu Ichinose, Takashi Sato, Yoshiro Miyoshi, Kazuyoshi Takahashi
  • Patent number: 7199839
    Abstract: A color signal processing apparatus for a multi-primary display with a simple circuit construction and a color signal processing method achieves a display white by more than four display primaries. The color signal processing apparatus has a tristimulus value calculation unit calculating tristimulus values (X, Y, Z) of an input color signal, a display primary control signal calculation unit calculating a control signal of each display primary to represent the color signal with a number of display primaries, and a control unit setting the control signal of each display primary with the control signal calculated by the display primary control signal calculation unit to display the color signal.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: April 3, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Moon-cheol Kim
  • Patent number: 7068327
    Abstract: A video encoder capable of adjusting output levels and more effectively utilizing performances of later devices, provided with a level adjustment circuit for adjusting output levels of an input luminance signal, color signal, and composite video signal by adding DC offset in accordance with a value set in a register or the like in advance and outputting the same to a display device, and an image processing system using the same.
    Type: Grant
    Filed: November 13, 2002
    Date of Patent: June 27, 2006
    Assignee: Sony Corporation
    Inventor: Atsushi Hakomori
  • Patent number: 7053959
    Abstract: A mask circuit masks a digital video signal so that a video signal of an analog video signal is not outputted for a predetermined period after the start of output of a horizontal synchronizing signal of the analog video signal. A period of masking the digital video signal by the mask circuit is set in a control register, and the control register transmits the masking period to the mask circuit. A digital video signal to analog video signal converting unit converts the digital video signal masked and outputted from the mask circuit into an analog video signal. Thus, by setting in the control register the period of masking the digital video signal until the video signal of the analog video signal is stabilized, a digital video encoder can output a stable video signal.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: May 30, 2006
    Assignee: Sony Corporation
    Inventor: Naoki Hosoi
  • Patent number: 7034894
    Abstract: A multiple-format video encoder stores values of the sine and cosine functions in a ROM. According to the externally specified video format, an address calculating circuit calculates the addresses at which to access the ROM. In the multiple-format video encoder, a luminance/color-difference signal generating circuit generates color-difference signals B-Y and R-Y from digital RGB signals. A first multiplying circuit multiplies the color-difference signal B-Y by the values of the sine function stored in the ROM at the addresses specified by the address calculating circuit and multiplies the color-difference signal R-Y by the values of the cosine function stored at the same addresses.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: April 25, 2006
    Assignee: Rohm Co., Ltd.
    Inventor: Yasunori Kawamura
  • Patent number: 6999093
    Abstract: A background (sky box) in a video game or other virtual reality environment dynamically changes as a function of a parameter, producing a more realistic display. Luminance-only texture and color texture data are employed to create the background. The color texture data are provided as a lookup table in which one axis of the lookup table corresponds to time or another variable, and the other axis indicates the colors of pixels in the display as a function of the altitude or azimuth of the pixels. The luminance-only texture data are thus modulated by the chrominance values from the color texture data for pixels in the background. Optionally, one of a plurality of two-dimensional color textures can be selected as a function of the variable and applied to the luminance-only texture data.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: February 14, 2006
    Assignee: Microsoft Corporation
    Inventors: Mikey S. Wetzel, David Scott McCoy
  • Patent number: 6987541
    Abstract: A video signal processing circuit. includes: a bell table, a first switch, a carrier generating unit, a second switch and a calculation processing unit. The bell table inputs a color difference signal to output a modulation signal having an amplitude defined by the SECAM Standard of the color difference signal. The first switch selects one of the color difference signal and the modulation signal to output a first signal. The carrier generating unit inputs the color difference signal to generate a carrier signal having a frequency defined by the SECAM Standard of the color difference signal. The second switch selects one of the carrier signal and a carrier signal having frequency defined by the PAL Standard and/or the NTSC Standard to output a second signal. The calculation processing unit calculates the first and second signals to output a color difference modulation signal.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: January 17, 2006
    Assignee: NEC Electronics Corporation
    Inventor: Yoshikazu Komatsu
  • Patent number: 6961098
    Abstract: A TV encoder with a function of adjusting hue for receiving a first and second color mixture signals comprises a first and second multiplexors, a sin-cos generator, a first and second multiplier circuits, and an adder circuits. The first multiplexor alternately outputs the second color mixture signal and its inverted signal. The second multiplexor alternately outputs a first angle signal representative of an angle and a second angle signal representative of the negative value of the angle. The angle is adopted to change the hue. The sin-cos generator outputs a sin and cos signals with a phase angle alternately determined by the angle and its negative value. The first color mixture signal and the sin signal are multiplied through the first multiplier circuit so as to be output as a first product signal. The second color mixture signal and its inverted signal are alternately multiplied by the cos signal through the second multiplier circuit so as to output as a second product signal.
    Type: Grant
    Filed: June 25, 2002
    Date of Patent: November 1, 2005
    Assignee: Faraday Technology Corp.
    Inventors: Chien-hung Lin, I-ping Hsu
  • Patent number: 6925181
    Abstract: A system controls reproduction of a video transmission between a transmitter and a receiver. The system includes an encryptor with an offset generator adapted to receive the encrypted frame key and to generate a sequence of pseudo-random values for the color component; and an adder coupled to the offset generator and to the color component signal for providing an encoded color component signal. The system also includes a decryptor with a decryptor offset generator adapted to receive the encrypted frame key and to generate a decryptor pseudo-random value for the color component; and a subtractor coupled to the offset generator and to the color component signal for subtracting the offset signal from the color component signal.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: August 2, 2005
    Assignee: LSI Logic Corporation
    Inventors: Leslie Kohn, David A. Barr, Didier Le Gall
  • Patent number: 6917655
    Abstract: A data encoding system includes a modifier, an encoder, and a feedback. The modifier receives a first data stream and modifies the first data stream so as to provide a second data stream. The encoder encodes the second data stream in order to provide an output. At least a portion of the output has predetermined symbol values. A feedback from the encoder to the modifier provides encoder states to the modifier. The modifier modifies the first data stream based on the encoder states so as to facilitate the encoder in providing the portion of the output having the predetermined symbol values. A receiver receives a signal based on the output and decodes the signal.
    Type: Grant
    Filed: August 8, 2002
    Date of Patent: July 12, 2005
    Assignee: Zenith Electronics Corporation
    Inventors: Mark Fimoff, Wayne E. Bretl
  • Patent number: 6714260
    Abstract: A digital imaging system generates a composite video signal and the carrier frequency of a desired television channel is generated internal to the imager integrated circuit. The carrier frequency is then amplitude modulated with the composite video signal by either digital or analog means located on-chip. Thus, a radio frequency signal that can be picked up by conventional television receivers is directly synthesized on-chip to provide a wireless video link.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: March 30, 2004
    Assignee: Conexant Systems, Inc.
    Inventor: Joshua I. Pine
  • Patent number: 6525781
    Abstract: An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to present a first signal and a second signal in response to (i) a select signal, (ii) a first difference signal and (iii) a second difference signal. The second circuit may be configured to present a modulated output signal in response to the first signal, the second signal and a control signal. The first circuit may alternately operate on one of either (i) the first difference signal or (ii) the second difference signal. In one example, the present invention may be implemented as a SECAM video encoder.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: February 25, 2003
    Assignee: LSI Logic Corporation
    Inventor: Peter W. Runstadler
  • Patent number: 6462789
    Abstract: A digital video encoder (16) receives a reference clock signal (REF_CLK27) for determining both a short term and a long term phase correction factor. A pulse detector (46) determines a number of sample clock (CLK324) time periods between the reference clock signal (REF_CLK27) and a clock signal (CLK27) that is derived from the data received by the digital video encoder (16). A phase increment generator (56) supplies an accumulator circuit (58) with a long term phase increment value based on the number of sample clocks and a TV_standard signal. A counter (60) and a phase look-up table (62) supply a short term increment value. The combined short term and long term increment values provide phase and frequency accuracy for the video subcarrier signal.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: October 8, 2002
    Assignee: Motorola, Inc.
    Inventors: Luciano Zoso, Nicholas J. M. Spence
  • Publication number: 20020047934
    Abstract: A front end signal processing method and apparatus for processing a signal from an image sensor are provided for readily clamping a black level, improving the manufacturing yield, and reducing the power consumption. A luminance detector/digitizer receives a sensor output signal from an image sensor, detects luminance information included in the sensor output signal, and generates a digital luminance signal representative of the detected luminance information. A digital processor receives the digital luminance signal, and multiplies the digital luminance signal by a predetermined gain code to generate the multiplication result as a front end processed signal output. An optical black clamp receives the digital luminance signal from the luminance signal detector/digitizer and supplies a feedback signal produced from the digital luminance signal to the luminance signal detector/digitizer to clamp a black level of the luminance signal to a constant value.
    Type: Application
    Filed: December 20, 2000
    Publication date: April 25, 2002
    Inventors: Shozo Nitta, Kenji Tanaka, Tatsuo Isumi, Akira Morikawa, Kyoji Matsusako, Sean Chuang, Mike Koen
  • Publication number: 20020015111
    Abstract: This invention relates to an image processing apparatus for processing an image sensed by an image sensing element such as a CCD sensor, and the apparatus includes a dark correction circuit for making dark correction of the image, a defect correction circuit for correcting a defective pixel in the image using other pixels, and a controller for controlling the shares of dark correction by the dark correction circuit and defect correction by the defect correction circuit on the basis of information which pertains to image sensing (e.g., ISO speed, temperature, and accumulation time).
    Type: Application
    Filed: June 29, 2001
    Publication date: February 7, 2002
    Inventor: Yoshihito Harada
  • Patent number: 6332056
    Abstract: A video recorder, includes: a filter for performing a comb-filtering operation and supplying a comb-filtered component of a video signal; controllable influencing apparatus for terminating the output of the comb-filtered component and activating instead, the propagation of the non-filtered component; transition detection apparatus for detecting a vertically extending transition and supplying characteristic information upon detection of such a transition; control information generating apparatus, arranged between the transtion detection apparatus and the influencing apparatus, for generating control information enabling the termination of the output of the comb-filtered component and the activation of the propagation of the non-filtered component for a period of time which is longer than possible by means of the characteristic information.
    Type: Grant
    Filed: November 18, 1998
    Date of Patent: December 18, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Karl Gedl, Willibald Friedreich, Thomas Schuhmacher, Andreas Ɯberreiter
  • Patent number: 6268889
    Abstract: RGB signals and sync signals H and V are inputted from a personal computer or the like. Additional information is superimposed to a vertical blanking period of the R signal. A timing generating unit generates a sampling pulse on the basis of the sync signals. A data extracting unit extracts the additional information by using the pulse. Processes such as discrimination of a category of the additional information and a parity check are executed by an information decoding unit. A converter converts the RGB signals into an NTSC signal. VBI data and a copy prevention signal are formed in response to a decoded result of the information decoding unit. The VBI data and copy prevention signal are superimposed to the NTSC signal in adders.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: July 31, 2001
    Assignee: Sony Corporation
    Inventor: Teruhiko Koori
  • Patent number: 6259479
    Abstract: A method and apparatus for changing the number of scan lines in a frame of video data to produce an image represented by the video data that corresponds to a desired aspect ratio. The apparatus includes a pair of finite impulse response filters for processing the decoded chrominance and luminance pixel values stored in memory. The filters permit a plurality of scan lines of chrominance and luminance data to be read and filtered on a continuous basis with any scan line of data being read only once. Thus, the filters provide a very efficient method of providing a frame of a number of output scan lines of chrominance and luminance pixel values that are different from the number of scan lines of chrominance and luminance pixel values in a frame of video data stored in memory.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: July 10, 2001
    Assignees: Sony Corporation, Sony Electronics Inc.
    Inventors: Shirish C. Gadre, Taner Ozcelik
  • Patent number: 6229579
    Abstract: A color encoder is incorporated in an apparatus for reproducing a signal recorded on a disk for a video-CD, CD-G, or similar system. The color encoder serves as an interface between such an apparatus and a television receiver. The color encoder has a color-difference signal forming circuit for forming a color-difference signal from R, G, and B signals reproduced from a disk, a modulation circuit for modulating a chrominance subcarrier with the color-difference signal, and chrominance subcarrier generating device for generating the chrominance subcarrier. Moreover, to generate a chrominance signal having the same frequency for any of a plurality of clocks having different predetermined frequencies, the chrominance subcarrier generating device has a plurality of ROMs, each containing in its data area a data table corresponding to a different frequency, and a ROM switching circuit for selecting a ROM to be accessed from among the plurality of ROMs in accordance with a switching signal.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: May 8, 2001
    Assignee: Rohm Co., Ltd.
    Inventors: Masahito Kondo, Kyoji Marumoto
  • Patent number: 6226042
    Abstract: A color encoder is incorporated in an apparatus for reproducing a signal recorded on a disk for a video-CD, CD-G, or similar system. The color encoder serves as an interface between such an apparatus and a television receiver. The color encoder converts R, G, and B signals reproduced from a disk into a color television signal. The color encoder is provided with a circuit for generating a blanking interval control signal that is used to switch between blanking intervals of different duration in accordance with a select signal, so that the duration of the time interval during which video signals are suppressed can be selectively varied. The color encoder has, in the input paths for the R, G, and B signals, switches for enabling and disabling the passage of those signals, and these switches are controlled by the blanking control signal.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: May 1, 2001
    Assignee: Rohn Co., Ltd.
    Inventors: Masahito Kondo, Kyoji Marumoto
  • Patent number: 6141064
    Abstract: A luminance signal generation circuit with single clamp generates a separate luminance signal Y by combining RGB input signals in a weighted manner within a Y-Matrix circuit. During a burst period the single clamping circuit is enabled. When enabled, the single clamping circuit compares the separate luminance signal Y to a constant reference voltage signal. A difference signal, representing the difference between the separate luminance signal Y and the constant reference voltage signal, is used to adjust a blanking level of the RGB input signals until the blanking level of the separate luminance signal Y is equal to the constant reference voltage signal. During the non-burst periods the single clamping circuit is disabled and the Y-Matrix circuit combines the RGB input signals into the separate luminance signal Y. Preferably, the single clamping circuit sets the blank level of the separate luminance signal Y to a level equal to two volts.
    Type: Grant
    Filed: May 8, 1997
    Date of Patent: October 31, 2000
    Assignees: Sony Corporation, Sony Electronics, Inc.
    Inventors: Mehrdad Nayebi, Duc Ngo
  • Patent number: 6124899
    Abstract: The invention features furnishing a representation of the quadrature amplitude modulation of two input signals (e.g., U and V video signals) based on the phase of a reference signal (e.g., a color burst reference signal). The two input signals are scaled based on the phase of the reference signal, and the scaling is synchronized to the phase of the reference signal.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: September 26, 2000
    Assignee: ATI International
    Inventors: Philip L. Swan, Antonio A. Rinaldi
  • Patent number: 6061101
    Abstract: An apparatus to modulate the digital color signal using a simple circuit that utilizes neither multiplier nor ROMs to multiplying a sine wave and cosine wave. The digital color signal modulating apparatus includes a first selector, a second selector 3, and a third selector. The first selector and the second selector provide the U signal component and the V signal component of the digital color signal to the third selector at a half cycle, rate respectively. The third selector alternately selects one of those signals, which is combined with the sub-carrier wave. For both modulations with the sine wave and with the cosine wave, the input signal is inverted and the fourth selector selects the outputs of the through path and the inversion path in turn, thus producing the modulated outputs.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: May 9, 2000
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Akihiro Takei
  • Patent number: 6055019
    Abstract: A digital component signal derived from a video camera and the like is converted into a digital composite signal such as a color TV signal by a low-cost converting apparatus with a simple circuit arrangement. The converting apparatus includes an encoding circuit for encoding the inputted digital component signal to produce a digital component signal having a first sampling frequency equal to a sampling frequency of a luminance signal of the inputted digital component signal, an oversampling filter circuit for oversampling a digital composite signal outputted from the encoding circuit by a second sampling frequency higher than the first sampling frequency and thereafter for removing unnecessary high frequency components from the over-sampled digital composite signal, and a rate converting circuit for rate-converting the second sampling frequency of the digital composite signal outputted from the oversampling filter circuit into a third sampling frequency different from the first sampling frequency.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: April 25, 2000
    Assignee: Sony Corporation
    Inventor: Shigeaki Takahashi
  • Patent number: 6052156
    Abstract: A digital color encoder capable of reducing the aperture distortion of D/A conversion and the waveform distortion of the video signal without resulting in the increase of the consumed electric current. At first, digital signals sampled with a sampling frequency are inputted as original color signals. The digital composite color video signals of the sampling frequency fl are created from those signals by digital signal processing with the combination of matrix circuit, color burst controlling circuit, modulation circuit, addition circuit, and synchronization signal adding circuit, etc. Next, the sampling frequency of the composite color video signal is converted by a sampling frequency converting circuit inserted immediately before the D/A converter. The converted signal is further converted to an analog signal capable of being inputted into the TV set by a D/A converter, and the signal is outputted as a video signal.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: April 18, 2000
    Assignee: Ricoh Company, Ltd.
    Inventors: Takuo Mukai, Kentarou Hara, Masaharu Adachi
  • Patent number: 6034796
    Abstract: In data processing wherein image data are processed by dividing them into blocks, a chroma data W is obtained from the color difference data W.sub.R and W.sub.B, and the color difference data W.sub.R and W.sub.B are corrected according to an amplitude of the chroma data W. For example, if the chroma W is smaller than a prescribed threshold value, the color difference data W.sub.R and W.sub.B are set as zero. Then, the so-called block distortion can be prevented. The degree of the correction may depend on the amplitude of the chroma data W. On the other hand, DC coefficients of discrete cosine transform coefficients of adjacent blocks are compared with each other. When the DC coefficients are different from each other, block distortion occurs if they represent a same image. Then, if differences of DC coefficients of discrete cosine transform coefficients of adjacent blocks are small with each other, the DC coefficients are corrected to tend to have similar values.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: March 7, 2000
    Assignee: Minolta Co., Ltd.
    Inventors: Hiroyuki Suzuki, Munehiro Nakatani, Kazuomi Sakatani
  • Patent number: 5995164
    Abstract: In a video encoder, the color distortion between pixels can be reduced by encoding the hue transition to limit very large hue (phase) transitions and encode a corresponding smaller phase transition. This produces fewer spurious colors between pixels during the encoding. This can be done by comparing the change in hue value to a reference value and adding or subtracting 2 .pi. to this reference value to reduce the absolute value of a modified delta hue signal.
    Type: Grant
    Filed: September 29, 1997
    Date of Patent: November 30, 1999
    Assignee: Zilog, Incorporated
    Inventor: Anatoliy V. Tsyrganovich
  • Patent number: 5946053
    Abstract: An image encoder and subcarrier signal generator. The present invention uses a system clock signal to generate a first subcarrier signal and a second subcarrier signal with a phase-delay of 90.degree. behind the first subcarrier signal.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: August 31, 1999
    Assignee: Industrial Technology Research Institute
    Inventors: Chen-Pang Kung, Pei-Hui Tung, Yuan-Ping Huang
  • Patent number: 5929937
    Abstract: A device and method for generating a composite color signal are disclosed. The device includes a first memory unit for storing digital cosine data, a second memory unit for storing digital sine data, a first arithmetic unit for multiplying digital color difference data Cr input thereto with the digital cosine data, a second arithmetic unit for multiplying digital color difference data Cb input thereto with the digital sine data, and an adder for adding outputs of the first and arithmetic units to generate a digital composite color signal. The method includes the steps of storing digital cosine data and sine data in at least one of first and second memories, modulating digital color data using the stored digital sine and cosine data, and generating a composite color signal using the modulated digital color data.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: July 27, 1999
    Assignee: LG Electronics Inc.
    Inventor: In Seong Hwang
  • Patent number: 5917555
    Abstract: A composite video signal generator, which can be simply implemented using an application-specific integrated circuit (ASIC), is provided. The composite video signal generator according to the present invention has an oscillator for generating a clock signal at 4.multidot.f.sub.x of a color burst signal. A color burst generator creates the color burst signal by dividing the frequency of the clock signal and switching the divided clock signal according to a first control signal. A color signal is generated by phase-shifting the clock signal according to a second control signal to produce a phase-shifted clock signal, and dividing the frequency of the phase-shifted clock signal. The angle of the phase-shifting corresponds to a particular color. A luminance signal processor converts received luminance data into an analog luminance signal according to a third control signal.
    Type: Grant
    Filed: September 16, 1997
    Date of Patent: June 29, 1999
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jeom-han Bae