Patents by Inventor Wai-Choong Wong

Wai-Choong 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).

  • Patent number: 5420851
    Abstract: A low delay multiple access scheme called Shared Time-Division Duplexing (STDD), allows both uplink and downlink voice traffic to share a common channel. The scheme contains separate uplink and downlink control channels and a common voice information channel. The control channels comprise means for signalling voice requirements and acknowledgements of the time slot allocation. Using speech activity detection only, talk spurt speech packets are generated for transmission. STDD dynamically allocates time slots in the common information channel taking advantage of coordinated two-way conversations to achieve high statistical multiplexing gain and more efficient realization of the common information channel.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: May 30, 1995
    Assignee: AT&T Corp.
    Inventors: Nambirajan Seshadri, Carl-Erik W. Sundberg, Wai-Choong Wong