Patents Examined by Reinhard J. Eisenzopf
  • Patent number: 6307593
    Abstract: A method of transmitting a leakage tagging signal includes inserting a tagging signal into a CATV television signal only during portions of the television signal in which control information is present. A method according to the present invention is a method of transmitting a tagging signal in a communication system, the communication system transmitting television signals comprising control information and program information. One step of the method includes generating a tagging signal that is detectable by corresponding leakage detecting equipment. The method also includes the step of identifying a portion of a television signal in which control information is present. Finally, the method of the present invention encompasses inserting the tagging signal into the television signal only during the portion of the television signal in which control information is present.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: October 23, 2001
    Assignee: Wavetek Corporation
    Inventors: Andrew E. Bowyer, Pingnan Shi
  • Patent number: 6307600
    Abstract: A tuner, for example, for a television receiver, includes a UHF and a VHF section and a mixer oscillator stage. It is known that the VHF frequency band has to be split in at least two parts to handle the VHF signals. To that end, the mixer oscillator stage uses two separate VHF oscillators and a detector to switch tuned parts of the VHF section. In this way, the performance of the tuner is improved.
    Type: Grant
    Filed: March 10, 1999
    Date of Patent: October 23, 2001
    Assignee: U.S. Philips Corporation
    Inventor: Meye Wink
  • Patent number: 6304298
    Abstract: A method of determining the position of a TV camera relative to a patterned panel being viewed by the TV camera including the steps of: identifying a plurality of edge points of the pattern from the video signal produced by said camera and using these edge points to calculate the perspective of the pattern relative to the camera.
    Type: Grant
    Filed: July 2, 1997
    Date of Patent: October 16, 2001
    Assignee: Orad Hi Tec Systems Limited
    Inventors: Alexander Steinberg, Zinovy Livshits, Itzhak Wilf, Moshe Nissim, Michael Tamir, Avi Sharir, David Aufhauser
  • Patent number: 6304291
    Abstract: A digital camera system is disclosed including an image sensor for sensing an image; storage means for storing the sensed image and associated system structures; data input means for the insertion of an image modification data module for modification of the sensed image; processor means interconnected to the image sensor, the storage means and the data input means for the control of the camera system in addition to the manipulation of the sensed image; printer means for printing out the sensed image on demand on print media supplied to the printer means; including providing an image modification data module adapted to cause the processor means to perform a series of diagnostic tests on the digital camera system and to print out the results via the printer means. Preferably, the image modification module can is comprise a card having instruction data encoded on one surface thereof and the processor means includes means for interpreting the instruction data encoded on the card.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: October 16, 2001
    Assignee: Silverbrook Research Pty Ltd
    Inventor: Kia Silverbrook
  • Patent number: 6304296
    Abstract: The present invention provides a technique for appropriately adjusting a dot clock for video signals by a simple process. A process of adjusting a phase of the dot clock first obtains two image data by two dot clocks having different phases, carries out a certain operation for the two image data to calculate a phase-related index representing the relative phase of the dot clock to a video signal with respect to the two image data, and determines a delay that gives a desirable phase to the dot clock based on these phase-related indexes. A first process of adjusting the frequency of the dot clock first obtains image data by a dot clock that has been generated with a provisional factor, calculates a length of an effective signal area on one line of the image data, and determines a desirable factor based on the ratio of a known length to the measured length of the effective signal area.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: October 16, 2001
    Assignee: Seiko Epson Corporation
    Inventor: Kunio Yoneno
  • Patent number: 6304299
    Abstract: A wide-band overlay sequence generator adds an overlay signal to a television signal which is transmitted through a channel. At a receiver, a replica of the transmitted overlay sequence is generated and synchronized to the overlay signal in the received signal. An adaptive equalizer filter effectively adjusts the received television signal so that the channel perturbations are removed from the signal.
    Type: Grant
    Filed: November 30, 1998
    Date of Patent: October 16, 2001
    Assignee: General Electric Company
    Inventors: Richard Louis Frey, Naofal Mohammed Wassel Al-Dhahir, Mark Lewis Grabb, John Anderson Fergus Ross, John Erik Hershey, Nick Andrew Van Stralen
  • Patent number: 6304300
    Abstract: The present invention provides a method, a device, and a system for performing gamma correction on a set of pixel data based on a gamma correction curve table. The gamma correction curve table includes a specified total number of intensity levels associated with gamma corrected pixel values with one intensity level per pixel value. The method includes partitioning the gamma correction curve table into N segments such that each of the N segments is associated with a set of intensity levels from the specified total number of intensity levels. A plurality of intensity levels is selected for each of the N segments such that significant banding effects are not visible to the human eye between an adjacent pair of the selected intensity levels. The gamma corrected pixel values are stored for each of the N segments such that each of the plurality of selected intensity levels functions as an index to the associated gamma corrected pixel values.
    Type: Grant
    Filed: November 12, 1998
    Date of Patent: October 16, 2001
    Assignee: Silicon Graphics, Inc.
    Inventors: David S. Warren, Andrew D. Bowen, David L. Dignam
  • Patent number: 6300980
    Abstract: A computer system provides a communication link to a display monitor so as to control the display of not only computer signals but of other signals such as television signals. By providing this link the additional power of the computer can be used to provide a storage of preferred settings for the television/display monitor depending upon signal sources, time of day or the like. This provides a more versatile display. Further data contained within a received data stream such as from a web page or the like may inherently control functions of the television display.
    Type: Grant
    Filed: February 19, 1997
    Date of Patent: October 9, 2001
    Assignee: Compaq Computer Corporation
    Inventors: Montgomery C. McGraw, Ralph K. Williamson, Elizabeth A. Richard, Drew S. Johnson, Christopher D. Voltz, John C. Barker, Kevin J. Brusky
  • Patent number: 6297845
    Abstract: A switched digital video broadcast network provides in-service testing of digitized broadcast video signals subject to analog-to-digital and digital-to-analog conversion. The network includes a plurality of gateways, each gateway coupled to video signal sources and sink. Video frames transmitted on the network are subject to analog-to-digital and digital-to-analog conversion and compression in an MPEG 2 encoder/decoder. Each gateway and includes a test pattern generator and test measurement analyzer for in-service testing of the video signals. The test pattern generator inserts a test signal on pre-selected lines (22, 23 or 261,262) in a Video Blanking Interval (VBI) and time periods of a video frame. The test signal may be dynamically placed at any location in the frame using concealment techniques The video lines are not seen by television viewers.
    Type: Grant
    Filed: December 29, 1998
    Date of Patent: October 2, 2001
    Assignee: International Business Machines Corporation
    Inventors: Karl J. Kuhn, John Mark Zetts
  • Patent number: 6297847
    Abstract: Visible artifacts introduced into a digitally sampled video signal are removed from a non-interlaced version of the video signal. The non-interlaced version of the video signal is generated by a converter that converts a digitally sampled interlaced video stream to a non-interlaced video stream. An artifact removal module responds to at least a first component of the non-interlaced video stream by adaptively modifying the first component of the non-interlaced video stream to reduce artifacts introduced into the non-interlaced video stream by the converter to generate a modified non-interlaced video stream.
    Type: Grant
    Filed: August 3, 1998
    Date of Patent: October 2, 2001
    Assignee: S3 Graphics Co., Ltd.
    Inventor: Eberhard H. Fisch
  • Patent number: 6297850
    Abstract: A sync signal generating apparatus and method for video signal processor are disclosed comprising an image processor processing either an input digital television video signal or an input analog television video signal to display one of the signals; a display unit displaying an output signal of the image processor; a frame rate detector detecting a frame of the digital video signal and generating a frame rate signal; a display mode detector detecting whether an image to be currently displayed is a digital television image or an analog television image and generating a display mode signal; a clock generator generating a clock signal according to the display mode signal and the format signal to the image processor; a sync signal compensation unit generating a sync compensation signal based upon the display mode signal, the clock signal, and a vsync signal of the analog television video signal; and a sync signal generator resetting and compensating a sync signal based upon the sync compensation signal and the cl
    Type: Grant
    Filed: December 30, 1998
    Date of Patent: October 2, 2001
    Assignee: LG Electronics Inc.
    Inventors: Dongil Han, Heung Chul Oh
  • Patent number: 6297855
    Abstract: A simplified Y/C separation circuit in which, a plurality of luminance signals are calculated for the subject pixel based on an NTSC signal of the subject pixel and NTSC signals of pixels that are close to the subject pixel spatially or temporally. Correlations between the plurality of luminance signals are obtained in a difference circuit and a comparison circuit. In a classification circuit, classification is performed, that is, the subject pixel is classified as belonging to a certain class, based on the correlations between the plurality of luminance signals. Prediction coefficients corresponding to the class of the subject pixel are read out from a prediction coefficients memory section. The RGB luminance signals of the subject pixel are then determined by calculating prescribed linear first-order formulae.
    Type: Grant
    Filed: December 22, 1998
    Date of Patent: October 2, 2001
    Assignee: Sony Corporation
    Inventors: Tetsujiro Kondo, Naoki Kobayashi, Hideo Nakaya, Takaya Hoshino, Takeharu Nishikata
  • Patent number: 6297853
    Abstract: A system (FIGS. 7 and 8) and method (FIG. 1) for video transmission of active events, for example sports events, having in the background physical images in designated targets, wherein the physical images are electronically exchanged with preselected virtual images, so that objects or shadows actually blocking the same portions of the virtual images, and the motion of players or a ball blocking the physical image will block corresponding regions of the exchanged virtual image, so that the exchanged electronic image will remain in the background of the event, exactly as the original image.
    Type: Grant
    Filed: August 12, 1998
    Date of Patent: October 2, 2001
    Assignee: Orad Hi-Tech Systems Ltd.
    Inventors: Avi Sharir, Michael Tamir
  • Patent number: 6297849
    Abstract: An output timebase corrector converts orthogonal sampled video (VS) into asynchronous sampled video (VOS) with asynchronous sample values occurring at clock instants (TC) of a clock signal (CLK). The asynchronous sampled video (VOS) is displayed on a display screen of a display device (DD). A discrete time oscillator (DTO) of a time-discrete phase-locked loop (PLL) supplies a time base signal (OS). The time-discrete phase-locked loop (PLL) determines a phase difference (PE) between the time base signal (OS) and reference instants (FB) indicating a timing of a line deflection of the display device (DD) to obtain the time base signal (OS) being locked to the reference instants (FB). The time base signal (OS) controls a sample rate converter (SRC) such that the asynchronous video values (VOS) which occur at the clock instants (TC) are interpolated from the orthogonal sampled video (VS) by the sample rate converter (SRC) such that the video signal is displayed on the correct position on the display screen.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: October 2, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Jeroen H. C. J. Stessen, Antonius H. H. J. Nillesen
  • Patent number: 6297851
    Abstract: A method and system for capturing analog video data and previewing still video images of the captured analog video data without converting the analog video data into digital image data. The system takes analog video data and converts the data into raw digitized video data. The raw digitized video data is stored in a memory until the data is selected for previewing. Once selected, the raw digitized video data is reconverted into analog video data that presents a still image of the desired data. The system is also able to discard unnecessary portions of the raw digitized video data and store only necessary portions of the raw digitized video data. Preferably, the video capture, preview, and storage technique is used in video printing. When used in video printing, the raw digitized video data is converted into digital image data using a software decoding process.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: October 2, 2001
    Assignee: Hewlett-Packard Co
    Inventors: David S. Taubman, Andrew J. Patti
  • Patent number: 6297848
    Abstract: A method and apparatus for low-delay conversion of 3:2 pulldown video to progressive format with field averaging is disclosed. The method considers 3:2 pulldown interlaced video that represents a four-frame motion picture film sequence as a ten-field interlaced video field sequence of three, two, three, two video fields per motion picture frame respectively for the four-frame sequence. One step of the method is the step of creating a ten-frame progressive video frame sequence, having a delay of approximately one field time with respect to the ten-field interlaced video sequence. This step is achieved by combining at one field time intervals a top field and a bottom field from the ten-field interlaced video sequence, where, at the time of combination, the top field and the bottom field are the most recently available top and bottom fields corresponding to the same motion picture film frame.
    Type: Grant
    Filed: November 25, 1998
    Date of Patent: October 2, 2001
    Assignee: Sharp Laboratories of America, Inc.
    Inventor: Larry A. Westerman
  • Patent number: 6295083
    Abstract: High precision image alignment detection uses an iterative part pixel shift detection algorithm to accurately determine the displacement of a received image with respect to a reference image. An alignment pattern is inserted into the original image and a portion of the alignment pattern, such as a single line, also is stored as a reference image. Using cross-correlation the received image is compared with the reference image to locate the alignment pattern, and selected portions of the received image alignment pattern are then used in conjunction with the reference image to determine the total pixel shift of the received image. An integer pixel shift is determined by cross-correlation of the received alignment pattern with the reference image. Using the integer pixel shift to identify a starting point, data is extracted from the received alignment pattern about a specific feature and a part pixel shift is measured.
    Type: Grant
    Filed: February 27, 1998
    Date of Patent: September 25, 2001
    Assignee: Tektronix, Inc.
    Inventor: Alexander Kuhn
  • Patent number: 6295098
    Abstract: An illumination intensity correcting circuit including a curve fitting circuit formed by differential amplifier circuits and a load resistor, wherein the amplification factor of the curve fitting circuit is changed before and after each breakpoint voltage, the reference voltages of the differential amplifier circuits are set so that at least two breakpoint voltages are arranged in the range of a voltage of a video signal, and the amplification factors of the differential amplifier circuits are set so that the amplification factor of the curve fitting circuit in the range of the signal voltage inside of the two breakpoint voltages is smaller than the amplification factor outside of the two breakpoint voltages.
    Type: Grant
    Filed: July 6, 1999
    Date of Patent: September 25, 2001
    Assignee: Sony Corporation
    Inventors: Hitoshi Motonakano, Shozo Mitarai, Akira Arimizu
  • Patent number: 6295092
    Abstract: A system that automatically captures one or more local news program broadcasts and separates the broadcasts into the individual news stories or segments. The system then compares the stories to historical data concerning the competitive characteristics of the stories for each station and determines the topic (local, national, crime, etc.), talent (newscaster 1, newscaster 2, etc.) and production (live, studio, voice-over-tape, etc.) characteristics of the stories. Other characteristics that affect the popularity and therefor the competitive characteristics of the broadcasts can also be displayed, such as pacing, average story length, news-to-advertisement ratio, broadcast ordering (news then weather then news then sports, etc.), etc.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: September 25, 2001
    Assignee: CBS Corporation
    Inventors: Richard A. Hullinger, William J. Trosky, Alan F. Mandel, Robert Ross, John D. Bartels, Brian A. Schultz
  • Patent number: 6295096
    Abstract: To enable interlacing edge-generating means to be used for a progressive image signal that is separated into lines as two sequences of signals, the present invention comprises a pre-edge processing circuit (11) that executes appropriate pre-edge processing on the progressive image signal separated into lines depending on the condition of each of the two signals, and an edge generating circuit (18, 19) that executes on the two signals after pre-edge processing pre-edge generation processing similar to that for interlacing.
    Type: Grant
    Filed: July 1, 1998
    Date of Patent: September 25, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Nobukatsu Okuda, Yoshiki Yamada