Patents by Inventor David Neil Siedle

David Neil Siedle 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 of partially scrambling a data stream
    Patent number: 7978852
    Abstract: A method of partially scrambling a data stream (6) including transport stream packets (7), each transport stream packet (7) having a header (8) and a payload (9), wherein a sequence of transport stream packets (7) has payloads carrying encoded data elements, arranged in units (15), includes: selecting transport stream packets (7) forming a subsequence of the sequence, and scrambling at least part of the payloads (9) of each transport stream packet (7) in the subsequence. The method further includes monitoring the payloads (9) of at least some of the transport stream packets (7) in the sequence for the presence of data (22) indicating a boundary between two subsequent units (15), and, for selected units (15), including at least one of the transport stream packets (7) carrying data forming part of the selected unit (15) in the sub-sequence.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: July 12, 2011
    Assignee: Irdeto Access B.V.
    Inventors: Andrew Augustine Wajs, Gerard Johan Dekker, David Neil Siedle, Roelof Van Wijk, Ronaldus Petrus Johannes Hoogenboom, James Stewart Crosbie Palmer, Thomas Franz Stockhammer