Patents by Inventor Yong Xia

Yong Xia 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).

  • Publication number: 20070165837
    Abstract: Input streams for acoustic echo cancellation are associated with timestamps using reference times from a common clock. A render delay occurs between when an inbound signal is written to a buffer and when it is retrieved for rendering. A capture delay occurs between when a capture signal is written to a buffer and when it is retrieved for transmission. Both the render delay and the capture delay are variable and independent of one another. A render timestamp applies the render delay as an offset to a reference time at which the inbound signal is written to the buffer for rendering. A capture timestamp applies the capture delay as an offset to a reference time at which when the capture signal is retrieved for transmission. Applying the delay times as offsets to the reference times from the common clock facilitates synchronizing the streams for echo cancellation.
    Type: Application
    Filed: December 30, 2005
    Publication date: July 19, 2007
    Applicant: Microsoft Corporation
    Inventors: Wei Zhong, Yong Xia
  • Patent number: D472852
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: April 8, 2003
    Assignee: Shanghai Hozou Motor Co., Ltd.
    Inventors: Kaijian Chen, Shuling Cheng, Haiqing Chen, Yong Xia