Patents by Inventor Mark Louis Ciacelli

Mark Louis Ciacelli 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).

  • Apparatus, method and computer program product for protecting copyright data within a computer system
    Patent number: 6236727
    Abstract: Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital processing insures against communication of clear data within the computer system from a central processing unit (CPU) to any accessible structure, such as memory or a system bus. Descrambling of the (CSS) scrambled data stream occurs within a module executing on the CPU, which is followed by reencryption of the data prior to transfer from the CPU. By so processing the data, integrity of copyrighted material is maintained, while allowing for software descrambling of the CSS encrypted data stream. Various techniques for establishing the encryption/decryption algorithm pair employed are described. Decryption of the re-encrypted data can occur at a receiving software module and/or a receiving hardware device, such as a decoder.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: May 22, 2001
    Assignee: International Business Machines Corporation
    Inventors: Mark Louis Ciacelli, John William Urda, Wai Man Lam, Jack Lawrence Kouloheris, John Edward Fetkovich
  • Apparatus, method and computer program product for protecting copyright data within a computer system
    Patent number: 6009171
    Abstract: Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital processing insures against communication of clear data within the computer system from a central processing unit (CPU) to any accessible structure, such as memory or a system bus. Descrambling of the (CSS) scrambled data stream occurs within a module executing on the CPU, which is followed by re-encryption of the data prior to transfer from the CPU. By so processing the data, integrity of copyrighted material is maintained, while allowing for software descrambling of the CSS encrypted data stream. Various techniques for establishing the encryption/decryption algorithm pair employed are described. Decryption of the re-encrypted data can occur at a receiving software module and/or a receiving hardware device, such as a decoder.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: December 28, 1999
    Assignee: International Business Machines Corporation
    Inventors: Mark Louis Ciacelli, John William Urda, Wai Man Lam, Jack Lawrence Kouloheris, John Edward Fetkovich
  • Memory management for an MPEG2 compliant decoder
    Patent number: 5668599
    Abstract: Disclosed is a digital signal decoder system for receiving compressed encoded digitized video signals and transmitting decompressed decoded digital video signals. This is accomplished with a minimum of DRAM demand through the use of a Spill Buffer.
    Type: Grant
    Filed: March 19, 1996
    Date of Patent: September 16, 1997
    Assignee: International Business Machines Corporation
    Inventors: Dennis Phillip Cheney, Mark Louis Ciacelli, Steven Bradford Herndon, John David Myers, Chuck Hong Ngai