Patents by Inventor Yoshiaki Oriyama

Yoshiaki Oriyama 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 and appartus for superposing a digital watermark and method and apparatus for detecting a digital watermark
    Patent number: 6246775
    Abstract: An apparatus for superposing a digital watermark for superposing digital watermark information on an information data signal bearing original information, superposes digital watermark information on an information data signal bearing original information, for each unit block consisting of a group of pieces of information data. This apparatus is provided with an auxiliary embedding circuit 10 for embedding second digital watermark information in the information data; a blocking circuit 12 for dividing into the unit blocks the changed information data signal obtained by the auxiliary embedding circuit; and a main embedding circuit 20 for embedding first digital watermark information in the changed information data signal for each of the divided blocks. The second digital watermark information bears information for identifying the position of the divided unit block in a predetermined section of the information data signal.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: June 12, 2001
    Assignee: Pioneer Electronic Corporation
    Inventors: Takeshi Nakamura, Kazumi Sugaya, Yoshiaki Oriyama