Patents by Inventor Toshizo Kosugi

Toshizo Kosugi 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).

  • DIGITAL WATERMARK DETECTION DEVICE AND DIGITAL WATERMARK DETECTION METHOD, AS WELL AS TAMPERING DETECTION DEVICE USING DIGITAL WATERMARK AND TAMPERING DETECTION METHOD USING DIGITAL WATERMARK
    Publication number: 20140278447
    Abstract: A digital watermark detection device includes a first chirp z-transform unit (202a) and a second chirp z-transform unit (202b) for estimating the cochlear delay characteristics simulated by cochlear delay filters that were used in embedding digital watermark data in an acoustic signal. The digital watermark data embedded in the acoustic signal is detected based on the cochlear delay characteristics estimated in accordance with the result of chirp z-transform applied by these first chirp z-transform unit (202a) and second chirp z-transform unit (202b).
    Type: Application
    Filed: August 22, 2012
    Publication date: September 18, 2014
    Applicant: Japan Advanced Institute of Science and Technology
    Inventors: Masashi Unoki, Ryota Miyauchi, Toshizo Kosugi