Patents by Inventor T. Wang

T. Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Wideband phased array antennas and methods
    Patent number: 5861845
    Abstract: Wideband phased array antennas are provided that eliminate the need for phase shifters in the region of the array face. In addition, they generate less beam squint than conventional antennas. In one embodiment, they include an electronic signal generator, reference and scanning manifolds and an array of n radiative modules. The signal generator generates a variable-frequency scanning signal s.sub.s and a reference signal s.sub.r wherein the frequency of the reference signal s.sub.r is substantially a selected one of the sum and the difference of the frequencies of the scanning signal s.sub.s and an operating signal s.sub.o. The reference manifold receives and divides the reference signal s.sub.r into n reference signal samples which are progressively time delayed by a selectable one of m reference differential time delays .DELTA.t.sub.r. The scanning manifold receives and divides the scanning signal s.sub.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: January 19, 1999
    Assignee: Hughes Electronics Corporation
    Inventors: Jar J. Lee, Ronald R. Stephens, Harry T. Wang
  • Method and system using meta-classes and polynomial discriminant functions for handwriting recognition
    Patent number: 5854855
    Abstract: A method and system of identifying text in a handwriting input is provided. The system includes a feature extractor (30) and a classifier (32). The feature extractor (30) extracts a plurality of features from handwriting input. The classifier (32) classifies the handwriting input according to a discriminant function that is based on a polynomial expansion. The text is identified according to the discriminant function output.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: December 29, 1998
    Assignee: Motorola, Inc.
    Inventors: James H. Errico, Nicholas M. Labun, John J. Loda, Michael C. Murdock, Shay-Ping T. Wang
  • Method and system for compressing a video signal using dynamic frame recovery
    Patent number: 5831872
    Abstract: A video signal is converted into a coefficient signal for each frame in a video image. Each coefficient signal comprises block coefficient signals which represent the pixels in a pixel map block (420) in a pixel map (410) with the coefficients in a hybrid polynomial. The coefficient signal for only selected frames is transmitted to a receiving computer (130). The coefficient signals are selected based on a number of coefficients in the coefficient signal for a current frame that vary from corresponding coefficients in the coefficient signal for a sequentially previous frame.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: November 3, 1998
    Assignee: Motorola, Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang
  • Method and system for recognizing a boundary between characters in handwritten text
    Patent number: 5818963
    Abstract: A method and system for identifying boundaries of characters in handwritten text by classifying segment strokes provides improved performance in a handwriting recognition system. A segment stroke is a portion of handwritten text which includes a boundary between two characters. The segment stroke is recognized by the same method used to recognized characters. Recognition of a segment stroke is accomplished by training a learning machine to act as a classifier which implements a discriminant function based on a polynomial expansion.
    Type: Grant
    Filed: November 4, 1996
    Date of Patent: October 6, 1998
    Inventors: Michael Murdock, Shay-Ping T. Wang
  • Cascade tuning controller and method of use therefor
    Patent number: 5805447
    Abstract: A cascade tuning controller and a method for use therefor is provided. The control inputs and the control coefficients are multiplied by scaling values. The scaling values are first tuned and the control coefficients are then tuned using a descent-based optimization method in order to optimize system performance.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: September 8, 1998
    Assignee: Motorola, Inc.
    Inventors: Dan Teng, Shay-Ping T. Wang
  • Method and system of storing data blocks that have common data elements
    Patent number: 5802522
    Abstract: In a method and system for storing a plurality of data blocks in a memory device, blocks of data elements are stored in a two-dimensional address space such that blocks overlap in the address space. The data elements may be digital words which represent exponents of a polynomial expansion. An overlapping data block is segmented into sub-blocks which are separated by null regions. Common data elements that are shared among the blocks are non-redundantly stored in the memory device.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: September 1, 1998
    Assignee: Motorola, Inc.
    Inventors: Scott E. Lloyd, Shay-Ping T. Wang
  • LNS-based computer processor and method of use thereof
    Patent number: 5798957
    Abstract: An LNS-based computer processor is provided for performing high-speed calculations that involve special function values. Special functions include transcendental and hyperbolic functions. The computer processor includes a decoder (11), a memory circuit (12) for storing a plurality of special function signals, a log converter (14), at least one processing element (16), and an inverse-log converter (18).
    Type: Grant
    Filed: December 28, 1995
    Date of Patent: August 25, 1998
    Assignee: Motorola Inc.
    Inventors: ShaoWei Wei Pan, Shay-Ping T. Wang
  • Method and system for compressing a pixel map signal using dynamic quantization
    Patent number: 5793892
    Abstract: A pixel map signal is converted into a coefficient signal of block coefficient signals, each representing the pixels in a pixel map block (420) in a pixel map (410) with the coefficients in a hybrid polynomial. The coefficient signal is quantized by dividing each of the coefficient values in each of the block coefficient signals by quantization factors to produce quantized coefficient values which replace the coefficient values. Block coefficient signals which represent an edge block (424) in the pixel map (410) are divided by larger quantization factors than block coefficient signals which represent a center block (422) in the pixel map (410). As a result, smaller quantized coefficient values are obtained so that block coefficient signals which represent an edge block (424) are compressed to a greater extent than block coefficient signals that represent a center block (422) in the pixel map (410).
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: August 11, 1998
    Assignee: Motorola, Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang
  • Method of generating high-resolution video
    Patent number: 5784116
    Abstract: Disclosed is a method for generating a high-resolution, real-time, digital video signal from an analog composite video signal such as an NTSC, PAL, or SECAM signal. The analog video signal is digitized and consecutive fields in the signal are merged to produce a frame. Non-uniform interpolation is performed between adjacent scan lines in the frame to generate the high-resolution video signal.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: July 21, 1998
    Assignee: Motorola Inc.
    Inventors: ShaoWei Pan, Shay-Ping T. Wang
  • Method and system for compressing a video signal using nonlinear interpolation
    Patent number: 5768427
    Abstract: A video signal is converted into a coefficient signal of block coefficient signals for each frame in a video image. Each of the block coefficient signals represents the pixels in a pixel map block (420) with the coefficients in a hybrid polynomial. The hybrid polynomial contains discrete cosine terms, a constant term separated from the discrete cosine terms, and polynomial terms separated from the discrete cosine terms. Coefficient signals for selected frames only are transmitted to a receiving computer (130). The coefficient signals for the selected frames are converted to decompressed pixel map signals and the pixel map signals for unselected frames are interpolated using nonlinear interpolation. The decompressed pixel map signals and interpolated pixel map signals are ordered into an original frame sequence to produce a decompressed video signal.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: June 16, 1998
    Assignee: Motorola, Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang
  • Method and system for velocity-based handwriting recognition
    Patent number: 5768417
    Abstract: The invention provides a computer-implementable method for detecting substroke boundaries in handwriting input. The method selects pen tip velocity extremas to represent. substroke boundaries. The method includes steps for generating a velocity profile from the handwriting input; identifying a plurality of peak extrema within the velocity profile; identifying a plurality of in-line extrema within the velocity profile; and detecting the substroke boundaries by filtering the plurality of peak extrema and the plurality of in-line extrema.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: June 16, 1998
    Assignee: Motorola, Inc.
    Inventors: James H. Errico, Michael C. Murdock, Shay-Ping T. Wang
  • FES method and system for controlling the movement of a limb
    Patent number: 5748845
    Abstract: A system for controlling the movement of at least one limb of a person's body includes an interface unit in communication with the person's body for receiving an input signal. A polynomial processor generates a control signal as a polynomial function of the at least one input signal. A generator generates a functional electrical stimulation signal. A plurality of electrodes stimulates the movement of the at least one limb by introducing the functional electrical stimulation signal to the at least one of a plurality of inactive muscles.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: May 5, 1998
    Assignee: Motorola, Inc.
    Inventors: Nicholas M. Labun, Thomas J. McClaughry, Shay-Ping T. Wang
  • Video system performing non-uniform interpolation of color space signals and method of using same
    Patent number: 5742350
    Abstract: A real-time video system which performs non-uniform interpolation between adjacent vertical scan lines is presented. The video system includes a converter, a memory, an enhanced-video circuit, and a sync generator. The video system decodes and digitizes an analog composite video signal, such as an NTSC, PAL, or SECAM signal, and generates a digital video signal having a greater number of horizontal scan lines than the analog video signal. The video system is programmable to allow a different number of scan lines in the output digital video signal.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: April 21, 1998
    Assignee: Motorola, Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang
  • Method and system for compressing a pixel map signal using a hybrid polynomial coefficient signal
    Patent number: 5742707
    Abstract: A pixel map signal is converted into a coefficient signal of block coefficient signals, each representing the pixels in a pixel map block (420) with the coefficients in a hybrid polynomial. The hybrid polynomial contains discrete cosine terms, a constant term separated from the discrete cosine terms, and polynomial terms. Each block coefficient signal contains a background component representing a coefficient of the constant term, a linear component representing the coefficients of a the polynomial terms, and a nonlinear component representing the coefficients of the discrete cosine terms. The background component represents constant, unchanging pixel values in a pixel map block (420), the linear component represents linearly changing pixel values in a pixel map block (420), and the nonlinear component represents nonlinear patterns in a pixel map block (420).
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: April 21, 1998
    Assignee: Motorola, Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang, Nicholas M. Labun
  • System for recognizing spoken sounds from continuous speech and method of using same
    Patent number: 5734793
    Abstract: A system for recognizing spoken sounds from continuous speech includes a plurality of classifiers and a selector. Each of the classifiers implements a discriminant function which is based on a polynomial expansion. By determining the polynomial coefficients of a discriminant function, the corresponding classifier is tuned to classify a specific spoken sound. The selector utilizes the classifier outputs to identify the spoken sounds. A method of using the system is also provided.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 31, 1998
    Assignee: Motorola Inc.
    Inventor: Shay-Ping T. Wang
  • Cutter for surgical probe
    Patent number: 5733297
    Abstract: A cutter for use in a surgical probe where the cutter has a first end for being coupled to a driving mechanism and an opposite end on which a blade portion and a contact portion are formed. The cutter is formed from a tube of hard material, such as stainless steel. The contact portion extends beyond the blade portion, which is used to cut tissue, thereby preventing the blade portion from contacting or hitting the inner surface of the closed end or tip of the needle of the probe.
    Type: Grant
    Filed: September 10, 1996
    Date of Patent: March 31, 1998
    Assignee: Medical Instrument Development Laboratories, Inc.
    Inventor: Carl C. T. Wang
  • Method and system for compressing a pixel map signal using block overlap
    Patent number: 5727084
    Abstract: A pixel map signal is separated into block signals, each representing pixels in a pixel map block (420) in a pixel map (410). The blocks signals each contain an overlap component having pixel values representing pixels contained both by the corresponding pixel map block (420) and an adjacent block. The pixel map signal is compressed by converting the block signals into a coefficient signal of block coefficient signals, each of which represents a pixel map block (420) with the coefficients in a hybrid polynomial. When the pixel map signal is decompressed, the pixel values in the overlap component for each pixel map block (420) are averaged with the pixel values in the overlap component for the adjacent block and replaced by the averaged pixel values in the corresponding pixel map block (420) and the adjacent pixel map block (420).
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: March 10, 1998
    Assignee: Motorola, Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang, Nicholas M. Labun
  • Method for structuring an expert system utilizing one or more polynomial processors
    Patent number: 5724486
    Abstract: Polynomial processors learn expert system rules, for either business or real-time applications, to improve the robustness and speed of execution of the expert system. One or more polynomial processors are constructed which incorporate the production rules of one or more expert systems. Each polynomial processor is constructed of computing elements or neuron circuits each having only one significant processing element in the form of a multiplier. Each polynomial processor utilizes a training algorithm which does not require repetitive training and which yields a global minimum to each given set of input vectors.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: March 3, 1998
    Assignee: Motorola Inc.
    Inventor: Shay-Ping T. Wang
  • Method and system for performing an FIR filtering operation
    Patent number: 5721696
    Abstract: A method and system for an FIR filter are provided. A sequence of input signal is converted to a corresponding sequence of log signals. FIR filtering coefficients are then added to each log signal to generate a plurality of term signals. The term signals are then converted to inverse-log signals, and the inverse-log signals are summed to produce an output signal. Log/inverse-log conversions of signals are based on estimating a log/inverse-log function using a second-order polynomial.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: February 24, 1998
    Assignee: Motorola Inc.
    Inventors: Shao Wei Pan, Shay-Ping T. Wang
  • Circuit for interpolating scan lines of a video signal and method of using same
    Patent number: 5717466
    Abstract: An enhanced-video circuit for performing non-uniform interpolation of video scan lines is presented. The circuit includes a plurality of interpolation circuits, a memory for storing coefficients, and a control unit. The control unit is programmable to vary the scan line spacing of the output video signal.
    Type: Grant
    Filed: June 29, 1995
    Date of Patent: February 10, 1998
    Assignee: Motorola, Inc.
    Inventors: ShaoWei Pan, Shay-Ping T. Wang