Patents by Inventor C. Alan Ludwig

C. Alan Ludwig 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).

  • Demultiplexer application programming interface
    Patent number: 7882510
    Abstract: A set of interfaces and data structures (i.e., a demultiplexer API) represents a demultiplexer of multimedia data. The data structure utilizes a number of fields, each containing an element of a command. In one embodiment, at least seven commands are formed for proper operation of the demultiplexer, including Initialize, SetPresentationDescriptor, GetPresentationDescriptor, GetPendingPresentationDescriptor, ProcessInput, ProcessOutput, and Flush commands. The demultiplexer API allows the consumer to use muxed stream data such as DV in a uniform manner to generate elementary stream data such as audio and video (compressed or uncompressed) and allows demultiplexers to be used as an independent component.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: February 1, 2011
    Assignee: Microsoft Corporation
    Inventors: Kirt Debique, Robin C. B. Speed, C. Alan Ludwig, Geoffrey T. Dunbar