Patents by Inventor Chi M. Lai

Chi M. Lai 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 processing a composite synchronizing signal
    Patent number: 5631709
    Abstract: A pulse separator 110 predicts the start of a vertical synchronizing pulse in a video composite synchronizing signal (VCSS) applied via input 105. At a predicted time, the pulse separator 110 provides a start signal via a first output to the bistable 125, thereby causing a signal at output 130 to vary from a first output level to a second output level. When the end of the vertical synchronizing pulse is detected in the VCSS, a stop signal is provided via a second output to the bistable 125, thereby causing the signal at the output 130 to vary from the second level to the first level. A multiplexer (MUX) 615 switched to couple horizontal synchronizing pulses from input 605 to output 620, when a vertical synchronizing pulse is received from input 625, and, switched to coupled pseudo horizontal synchronizing pulses from pseudo pulse generator 610 to the output 620 when a vertical synchronizing pulse is not received from the input 625.
    Type: Grant
    Filed: November 15, 1994
    Date of Patent: May 20, 1997
    Assignee: Motorola, Inc.
    Inventors: Kah H. P. Lam, Luen H. Kwok, Chi M. Lai