Patents by Inventor Eric W. Grab

Eric W. Grab 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: 20040081333
    Abstract: A method for producing and for subsequently decrypting a protected stream of compressed video content is described herein. The method includes receiving an input stream of compressed video content containing a sequence of frames. A set of encrypted frames are created by encrypting selected frames of the sequence of frames in accordance with a frame encryption function. The method further includes generating frame decryption information necessary to decrypt the set of encrypted frames. In a particular implementation the protected stream is assembled using the set of encrypted frames, unencrypted frames from the input stream, and the frame decryption information. The decryption process is initiated by receiving the protected stream of compressed video content and the corresponding frame decryption information. In this regard the frame decryption information includes data distinguishing the encrypted frames from the unencrypted frames of the compressed video content within the protected stream.
    Type: Application
    Filed: July 8, 2003
    Publication date: April 29, 2004
    Inventors: Eric W. Grab, Adam H. Li