Patents by Inventor Nai Sum Wong

Nai Sum Wong 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).

  • Method and apparatus for error correction
    Patent number: 7003045
    Abstract: A convolutional encoder (112) comprises a controller (201), having a transmission rate (e.g. frame rate) as an input. The controller (201) initializes the encoder (112) to an initial state based on a transmission rate currently being utilized. When decoding, a decoder (300) utilizes a Trellis diagram having an initial and final state based upon the frame rate.
    Type: Grant
    Filed: January 31, 2001
    Date of Patent: February 21, 2006
    Assignee: Motorola, Inc.
    Inventors: William K. Morgan, Lee M. Proctor, Nai Sum Wong, Mark D. Hetherington
  • Method and apparatus for checking communicated data
    Patent number: 6859456
    Abstract: An apparatus (18) and method (100) provide RLP data checking. The apparatus (10) includes a frame serialization stage (20) and a bad frame filter (22) that detects possible bad frames and reclassifies these bad frames as erasures. In this manner, bad frame data are not passed to the RLP layer (16), and unnecessary resetting and resynchronization steps are avoided.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: February 22, 2005
    Assignee: Motorola, Inc.
    Inventors: Mark D. Hetherington, Lee M. Proctor, Nai Sum Wong, John M. Harris
  • Method and apparatus for spreading symbols in a communication system
    Publication number: 20020186752
    Abstract: A spreader (216) comprises a code generator (301) and exclusive OR circuitry (303). In the preferred embodiment of the present invention the code generator (301) generates a code having a length and value dependent upon the current transmission rate. This code is then exclusive OR'd with the incoming data stream to produce spread data.
    Type: Application
    Filed: February 14, 2001
    Publication date: December 12, 2002
    Applicant: MOTOROLA, INC
    Inventors: Lee Proctor, William K. Morgan, Mark Hetherington, Nai Sum Wong
  • Method and apparatus for error correction
    Publication number: 20020141507
    Abstract: A convolutional encoder (112) comprises a controller (201), having a transmission rate (e.g. frame rate) as an input. The controller (201) initializes the encoder (112) to an initial state based on a transmission rate currently being utilized. When decoding, a decoder (300) utilizes a Trellis diagram having an initial and final state based upon the frame rate.
    Type: Application
    Filed: January 31, 2001
    Publication date: October 3, 2002
    Applicant: MOTOROLA, INC.
    Inventors: William K. Morgan, Lee M. Proctor, Nai Sum Wong, Mark D. Hetherington
  • Method and apparatus for determining the frame rate of a frame
    Patent number: 6285682
    Abstract: Because prior-art rate determination algorithms are prone to falsing, a sub-rate discrimination metric generator (160) is provided herein. The generator (160) correlates a received frame with known characteristics of sub-rate frames to generate additional metrics useful in rate determination. These metrics are passed to a modified rate determination algorithm (150).
    Type: Grant
    Filed: May 1, 2000
    Date of Patent: September 4, 2001
    Assignee: Motorola, Inc.
    Inventors: Lee M. Proctor, Mark D. Hetherington, Nai Sum Wong, William K. Morgan