Patents Examined by Howard W. Britton
  • Patent number: 5821992
    Abstract: A video buffer of a focal plane array (FPA) electrical interface module is presented for providing output capacitance cancellation. The buffer has a capacitance cancellation stage (50) for receiving an analog signal produced by a FPA. The cancellation stage (50) includes an amplifier having a gain greater than unity for amplifying the analog signal and positive feedback capacitor for reducing power requirements and providing an increased pixel rate for the system. A dc restoration stage (52) is included for setting the analog signal to a dc level that is required by an external system and a line driving stage (54) for driving a video cable from the buffer to the external components of the system.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: October 13, 1998
    Assignee: Raytheon Company
    Inventor: Richard Saylor
  • Patent number: 5821995
    Abstract: In a transmission system for bi-directionally transmitting and receiving a plurality of signals between two units, interconnected through a predetermined transmission path, if one of the plurality of signals falls into any of a transmission disabled state, a transmission not required state, a reception disabled state, and a reception not required state, at least one of a transmission operation and a reception operation for the signal in the one state is stopped or set into a stand-by state, thereby reducing electric power consumed by the transmission system. In addition, a transmission bandwidth of the transmission path is reduced by a portion associated with the signal in the one state, or an entire bandwidth for all signals except for the signal in the one state is expanded without changing the transmission bandwidth of the transmission path.
    Type: Grant
    Filed: April 22, 1996
    Date of Patent: October 13, 1998
    Assignee: Hitachi Denshi Kabushiki Kaisha
    Inventor: Hiroyuki Nisikawa
  • Patent number: 5818518
    Abstract: An apparatus for use in a method for scanning an image on a film and generating a video signal therefrom. The apparatus having a signal processor (10) receiving a plurality of input raster lines representing a film image, and a control unit (11) having controls (14) operating on said signal processor, whereby the number of the input raster lines used by the signal processor in the active raster to generate said output signal is variable. A signal representing a sequentially scanned image is supplied to filter (12) which performs an anti-aliasing and a decimation process. The amount of oversampling can be varied depending on various factors, such as film speed, and degree of anti-aliasing and aperture correction so as to optimize performance and, in CRT-based systems so as to maintain the size of the raster on the face of the CRT above a predetermined minimum.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: October 6, 1998
    Assignee: Innovision Limited
    Inventors: Gary Bryan Wordsworth, Stephen Sherlock, David Christopher Kneller, David Llyod Schnuelle
  • Patent number: 5808664
    Abstract: A method of converting two-dimensional images into three-dimensional images by producing from a two-dimensional image signal a first image signal which forms a basis and a second image signal delayed by a predetermined number of fields from the first image signal and taking one of the signals as a left eye image signal and the other as a right eye image signal. It is judged whether or not a scene represented by the two-dimensional image signal is changed. When it is judged that the scene is changed, delay indicating how many fields are there from a field corresponding to the first image signal to a field corresponding to the second image signal is set to a predetermined value, for example, zero.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: September 15, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Shugo Yamashita, Toshiyuki Okino, Haruhiko Murata, Toshiya Iinuma, Yukio Mori, Seiji Okada
  • Patent number: 5805207
    Abstract: A cinematographic camera is operated at three times normal frame rates and converted to digital video in a telecine operation. Motion estimation provides from the digital video motion vectors which are substantially free of temporal aliasing. These motion vectors are employed in film weave measurement and correction and in motion compensated noise reduction and scratch concealment to provide a high quality signal which can be displayed at the elevated frame rate or standards converted, using the high quality motion vectors, to any desired standard.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: September 8, 1998
    Assignee: Snell & Wilcox, Ltd.
    Inventors: John Watkinson, Roderick Snell
  • Patent number: 5805220
    Abstract: System for transmitting n video programs simultaneously through a transmission channel having a predetermined bitrate, comprising in cascade a decoding assembly and an encoding assembly. The decoding assembly consists of n parallel decoding means provided in parallel for decoding the coded input signals corresponding to said programs, and the encoding assembly consists of n encoding means being in cascade with each of said decoding means and each comprising a quantizer having a variable step size and a variable length encoder. The system also comprises means for controlling the step sizes of said encoding means in dependence upon their respective output bitrates, and these control means are also provided for controlling the output bitrates of said encoding means in dependence upon complexity values associated to the coded input signals of each decoding means with respect to the joint complexity of the plurality of said coded signals.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: September 8, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Gerrit J. Keesman, Petrus J. Van Otterloo
  • Patent number: 5805209
    Abstract: A vehicle camera system for obtaining picture data of a runaway vehicle is provided in a toll road system. A vehicle passing a tollgate (4) is picked up by a camera (6). As a license plate of a vehicle is detected, picture data are cyclically and subsequently stored in a pluarlity of fram memories (20). When the vehicle dishonestly leaves without paying a toll, a tollbooth attendant (m) depresses a push button (3) to generate an instruction signal so that one or a plurality of picture data just before the timing of such depression can be read out from the frame memory (20) to be transmitted to a central unit for separate storage. The instruction signal may also be generated automatically based on detection of the vehicle.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: September 8, 1998
    Assignee: Omron Corporation
    Inventors: Junjiro Yuge, Masaharu Nishino
  • Patent number: 5805228
    Abstract: A method and an apparatus for encoding an image signal. The apparatus includes an acquisition module disposed to receive the image signal. A first processor is coupled to the acquisition module. At least one encoder processor is coupled to the first processor. The at least one encoder processor produces an encoded image signal under control of the first processor. The method includes the steps of converting an input image signal into a predetermined digital format and transferring the digital format image signal to at least one encoder processor. The method further includes the step of applying, at the at least one encoder processor, a hierarchical vector quantization compression algorithm to the digitized image signal. At the next step, a resultant encoded bit stream generated by the application of the algorithm is collected. The method and apparatus of the present invention may be used in conjunction with an ordinary modem to transmit and/or receive audio, video sequences or still images.
    Type: Grant
    Filed: August 9, 1996
    Date of Patent: September 8, 1998
    Assignee: U.S. Robotics Access Corp.
    Inventors: John J. Proctor, Craig H. Richardson, Chris J. M. Hodges, Kwan K. Truong, David L. Smith
  • Patent number: 5805222
    Abstract: A video coding apparatus for performing predictive coding of digital video input signals. The apparatus employs a resolution selection controller that selects picture resolution to be used in coding of a source picture of a current frame, according to coding information in a previous frame. Such coding information includes quantizer step size, amount of coded data, and buffer occupancy. Before being supplied to a coding unit, the source picture is sent to a resolution converter, where the source picture is converted to gain the resolution selected by said resolution selection controller. The coding unit then encodes the source picture with the selected picture resolution.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: September 8, 1998
    Assignee: Fujitsu Limited
    Inventors: Akira Nakagawa, Kimihiko Kazui, Eishi Morimatsu, Takahiro Shimizu
  • Patent number: 5805202
    Abstract: A video surveillance system includes a remotely controllable video camera which generates a video signal, a video switch, a cable for transmitting the video signal from the video camera to the video switch, a control circuit connected to the cable for generating control signals to be transmitted to the video camera via the cable, and a control signal receiver associated with the camera and connected to the cable for receiving the control signals transmitted via the cable. The control signal receiver includes a detection circuit for automatically detecting the length of the cable and generating an adjustment signal indicative of the detected length of the cable. The control signal receiver also includes an adjustable circuit element which is adjusted on the basis of the adjustment signal so as to compensate for the detected length of the cable. The automatic cable compensation in the control signal receiver provides reliable detection of the camera control signals.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: September 8, 1998
    Assignee: Sensormatic Electronics Corporation
    Inventors: Christopher M. Mullins, Thomas J. Ray, John P. McDonough
  • Patent number: 5805210
    Abstract: An arrival order judgment device is easy in operation to judge the arrival order for positively recording slit images before and after the finish line for the arrival order judgment only in a necessary minimum range. Slit signals picked up by a line image sensor camera are inputted into a video signal delay circuit. The video signal delay circuit outputs the slit video signals at a predetermined delay time period A. When competitors approaches the finish line and the moment the competitors interrupt a photoelectric device, ON signals are inputted into a memory device to start the record of the images delayed for a predetermined time period. When the competitors are not on the finish line, the photoelectric device outputs OFF signals to a record instruction delay circuit. The record on the memory device is interrupted after the delay period set at the record instruction delay circuit has lapsed. Thus, it is possible to record the images after the competitors have passed through the finish line.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: September 8, 1998
    Assignee: Seiko Instruments Inc.
    Inventors: Satoshi Sekiya, Nobuo Obara
  • Patent number: 5793425
    Abstract: A method and apparatus for dynamically allocating the available bandwidth of a common transmission channel of a multiplexed system among multiple encoders in such a manner as to maximize and equalize the quality of the encoded data output by all of the encoders, while also preventing underflow or overflow of encoder or decoder buffers at each end of the common transmission channel, and moreover, while also ensuring compliance with (i.e., without violating) the data encoding and transmission protocol utilized by the system. Further, the bandwidth of the common transmission channel is preferably allocated using an algorithm that does not impose any constraints on the size of the encoder or decoder buffers, other than any constraints specified by the data transmission protocol employed in transmitting the encoded data over the common transmission channel.
    Type: Grant
    Filed: September 13, 1996
    Date of Patent: August 11, 1998
    Assignee: Philips Electronics North America Corporation
    Inventor: Mahesh Balakrishnan
  • Patent number: 5790181
    Abstract: A panoramic imaging system, for monitoring a space, comprises a single camera and a dome-like convex mirror. The camera is mounted relative to the mirror so that at least most of the surface of the mirror is within the field of view of the camera. The mirror has an elevation gain, .alpha., greater than 3 and a profile which (a) ensures that radiation from at least most of the space is reflected by the mirror onto the image plane of the camera, and (b) satisfied the relationship, in polar co-ordinates,Sin?A+0.5(1+.alpha.).theta.!=C.r.?-0.5(1+.alpha.)!where C is a constant and A specifies the inclination of the profile to the optical axis of the camera at the point on the mirror which is closest to the aperture lens of the camera. The camera may be an electronic camera having a charge coupled device (CCD) sensor at its image plane, and the processed image of the space produced by the camera may be displayed on a monitor screen as a dewarped image.
    Type: Grant
    Filed: May 1, 1996
    Date of Patent: August 4, 1998
    Assignee: Australian National University
    Inventors: Javaan Singh Chahl, Martin Gerard Nagle, Mandyam Veerambudi Srinivasan, Peter John Sobey
  • Patent number: 5790188
    Abstract: A spectrally-filtered, miniature, imaging spectrometer system for airborne remote sensing data acquisition with a two dimensional field of view. Synchronized CCD-imager sensor modules or cameras are aligned to a common field of view. One sensor module has a visible range variable interference filter on its surface and a second module has a near-infrared range variable interference filter on its surface. Video data from the three sensor modules is combined and recorded on a single analog or digital recorder. Futher, such video data is monitored by a computer and used to control the shutter speed of each of the three sensor modules. Wavelength spectral image data and directional spectral image data are acquired by a single pass over a target area. Post-processing of such data produces reconstructed track-recovery-images extracted from a sequence of video frames for the spectral regions of interest at a fixed column position to produce multiple bands of monochrome images.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: August 4, 1998
    Assignee: Flight Landata, Inc.
    Inventor: Xiuhong Sun
  • Patent number: 5790185
    Abstract: A video logging tool is described which is particularly well adapted for production logging of oil or gas wells. The tool has both an end view optical system and a side view optical system for imaging side and end view on a CCD array in a camera.
    Type: Grant
    Filed: December 6, 1996
    Date of Patent: August 4, 1998
    Inventors: Fran.cedilla.ois Auzerais, Robert J. Schroeder, Benoit Couet, Jeffrey A. Tarvin
  • Patent number: 5781242
    Abstract: An image processing apparatus for storing image data into or from a frame memory is disclosed. The image data includes plural pieces of element data arranged in a matrix form of first predetermined numbers of rows and columns. The image processing apparatus includes a memory controller for controlling access to the frame memory for writing or reading the image data in or from the frame memory. The memory controller is configured to access the frame memory in either a raster unit consisting of one line of plural pieces of element data in the first predetermined numbers of rows and columns or a block unit consisting of plural pieces of element data arranged in a matrix of second predetermined numbers of rows and columns. The second predetermined number is smaller than the first predetermined number. A raster access address generator is connected to the memory controller and generates a raster access address for accessing the frame memory to write or read the image data in the raster unit.
    Type: Grant
    Filed: February 13, 1997
    Date of Patent: July 14, 1998
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiko Kondo, Minoru Takeuchi
  • Patent number: 5771066
    Abstract: An improved three dimensional display device, for a single viewer. To the apparatus of U.S. Pat. No. 5,132,839 is added a mechanism for tracking the eye motion of the viewer. Because the control system "knows" the angles at which the device must project the frame images, only two (stereoscopic) frame images need to be projected in each frame, and a more complete illusion of three dimensionality, with respect to both lateral and vertical movement of the viewer, is provided.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: June 23, 1998
    Inventor: Daniel I. Barnea
  • Patent number: 5767917
    Abstract: An apparatus for automatically synchronizing a video system to one of a plurality of composite synchronizing signals in accordance with a plurality of known video formats, includes a number of synchronizing signal stripper circuits, corresponding, respectively, to a number of types of composite synchronizing signals, a horizontal analyzer, having a plurality of horizontal standard identification circuits corresponding to a identification circuits for each known horizontal synchronizing signal rate for each type of composite synchronizing signal, for determining an approximate horizontal synchronizing signal rate and, a vertical analyzer, having a plurality of vertical rate identification circuits corresponding to the number of different known vertical rates, for determining the vertical synchronizing signal rate.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: June 16, 1998
    Assignee: U.S. Philips Corporation
    Inventors: Viktor L. Gornstein, Alan P. Cavallerano
  • Patent number: 5764280
    Abstract: A display device includes a plurality of modulatable light sources providing a one-dimensional array of display-elements, and a scanning unit, carried or worn by the user, which causes the user to perceive the array as a two-dimensional image. The scanning unit is movable with respect to the array while still allowing the user to view the array as a two-dimensional image.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: June 9, 1998
    Assignee: Silicon Light Machines Inc.
    Inventors: David M. Bloom, Asif A. Godil
  • Patent number: RE35910
    Abstract: A moving image signal encoding apparatus includes: a frame decimating circuit for extracting .?.encoded.!. frames from an input moving image signal at specified intervals; a frame interpolating circuit for obtaining an interpolated frame between the .?.encoded.!. .Iadd.extracted .Iaddend.frames, and a circuit for obtaining an error formed by frame interpolation. A moving image signal decoding apparatus includes: a receiving circuit for extracting a frame code from an inputted signal; a frame decoding circuit for decoding the frame code to obtain a reproduced frame, and a frame interpolating circuit for obtaining an interpolated frame between the reproduced frames. By transmitting an error of the interpolated frame from the encoding apparatus to the decoding apparatus and correcting the error of the interpolated frame with the decoding apparatus, the error of the interpolated frame is eliminated.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: September 29, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Atsushi Nagata, Kenichi Takahashi, Nobuyasu Takeguchi