Patents by Inventor Tom Kan

Tom Kan 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).

  • Generation of encrypted video information
    Patent number: 7681227
    Abstract: An encrypted stream of video information (20) contains first video frames (22) and second video frames which are accessible and not accessible during trick play respectively. From a source stream encrypted that is for decryption with repeatedly changing control words sections of the stream are identified where respective first ones of the frames occur in the stream. Control words for decryption (24) are included in the stream. At least part of the control words are included in the stream at positions selected synchronized to the identified sections.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: March 16, 2010
    Assignee: IPG Electronics 503 Limited
    Inventors: Sjoerd Zwart, Pieter-Jelle Gerbrandts, Tom Kan
  • METHODS, APPARATUSES AND COMPUTER PROGRAM PRODUCT FOR PROVIDING A CONTENT SUPERDISTRIBUTION SYSTEM
    Publication number: 20070299780
    Abstract: A method and system are provided for transferring content and one or more tokens between a server and one or more terminals. The method and system consists of a first terminal capable of connecting to a server and enabling the purchase of content and one or more tokens from the server. The server stores the content and token(s) on behalf of a user. The first terminal is capable of downloading the content and the token(s) stored at the server. Alternatively, a second terminal is capable of automatically downloading the content and the token(s) from the server upon connecting to a network.
    Type: Application
    Filed: April 26, 2007
    Publication date: December 27, 2007
    Inventors: Marko Vanska, Hong Qian, Tom Kan, John Chang
  • Generation of encrypted video information
    Publication number: 20060188094
    Abstract: An encrypted stream of video information (20) contains first video frames (22) and second video frames which are accessible and not accessible during trick play respectively. From a source stream encrypted that is for decryption with repeatedly changing control words sections of the stream are identified where respective first ones of the frames occur in the stream. Control words for decryption (24) are included in the stream. At least part of the control words are included in the stream at positions selected synchronized to the identified sections.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 24, 2006
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Sjoerd Zwart, Pieter-Jelle Gerbrandts, Tom Kan