Patents by Inventor Xiao Ling Chang

Xiao Ling Chang 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).

  • Switching compression routines with no loss of data
    Patent number: 6172987
    Abstract: A method and apparatus to change compression methods without data loss. A real time system for converting compressing data using one of several compression methods is described. When a change in compression rates is requested, the system changes compression methods while continuing to compress data in real time without data loss.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: January 9, 2001
    Assignee: Nortel Networks Limited
    Inventors: Kaveh Razazian, Xiao Ling Chang, Lois Greer