Patents by Inventor Tomoo Yamakage

Tomoo Yamakage 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).

  • Patent number: 7471807
    Abstract: An image size reduction unit reduces the image size of an input image signal, thereby generating a size-reduced image signal. A specific frequency component extraction unit extracts a specific frequency component signal from the size-reduced image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes a cross-correlation value between the phase-controlled specific frequency component signal and size-reduced image signal. A watermark information estimation unit estimates, from the cross-correlation value, watermark information embedded in the input image signal.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: December 30, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Tomoo Yamakage, Shinichiro Koto, Nakaba Kogure
  • Patent number: 7451320
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: November 11, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Publication number: 20080273744
    Abstract: A digital watermark embedding apparatus including a first scaling unit to scale an input image signal to one of enlargement and reduction, an extraction unit extracting a specific frequency component signal from the scaled image signal, a digital watermark signal generator to generate a digital watermark signal based on the specific frequency component signal and watermark information, a second scaling unit to scale the digital watermark signal to the other of the enlargement and reduction, and a compositor to combine the scaled digital watermark signal with the input image signal to generate a watermarked image signal.
    Type: Application
    Filed: November 28, 2007
    Publication date: November 6, 2008
    Inventors: Nakaba Kogure, Noboru Yamaguchi, Tomoo Yamakage
  • Publication number: 20080267596
    Abstract: According to one embodiment, in a recording medium in which a rewritable video manager and video objects are recorded, the video objects comprise video elementary streams defined in H.264, and the video manager includes information of the video objects having described therein a video object type in which a seamless flag and a seamless extension flag are described which show that the video objects are continuously and seamlessly reproduced for each of the video objects.
    Type: Application
    Filed: June 25, 2008
    Publication date: October 30, 2008
    Inventors: Tatsuaki IWATA, Shinichiro Koto, Masahiro Nakashika, Tomoo Yamakage
  • Patent number: 7437564
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: October 14, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7437565
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: October 14, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7428640
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: September 23, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7426641
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: September 16, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7426640
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: September 16, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7421584
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 23, 2007
    Date of Patent: September 2, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7398397
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: July 8, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7380127
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: May 27, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7370207
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: May 25, 2007
    Date of Patent: May 6, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Patent number: 7302573
    Abstract: A computer system with a monitor display, comprises a decoder unit configured to decode video data containing digital watermark information to derive decoded data, and configured to determine, based on information included in the video data, whether or not first certification for certifying that the video data is legitimately reproduced data succeeds, and a graphics controller which determines, using the digital watermark information, whether or not second certification for certifying that the video data is to be protected from being copied succeeds, the graphics controller converting the decoded data into a protected decoded data from being copied and outputting the protected decoded data to the monitor display if the first certification and the second certification succeed, and the graphics controller inhibiting the decoded data from being output to the monitor display if the first certification fails and the second certification succeeds.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: November 27, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Nakaba Kogure, Tomoo Yamakage, Hidenori Takeshima, Koichi Masukura, Taku Kato, Atsushi Ishihara, Wataru Asano
  • Patent number: 7284130
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: October 16, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Publication number: 20070230740
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Application
    Filed: May 25, 2007
    Publication date: October 4, 2007
    Inventors: Wataru ASANO, Shinichiro Koto, Tomoo Yamakage
  • Publication number: 20070230696
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Application
    Filed: May 25, 2007
    Publication date: October 4, 2007
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Publication number: 20070230741
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Application
    Filed: May 25, 2007
    Publication date: October 4, 2007
    Inventors: Wataru ASANO, Shinichiro Koto, Tomoo Yamakage
  • Publication number: 20070223784
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Application
    Filed: May 25, 2007
    Publication date: September 27, 2007
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage
  • Publication number: 20070223786
    Abstract: A specific frequency component extraction unit extracts a specific frequency component signal from an input image signal. A phase controller controls the phase of the specific frequency component signal. A correlator computes the cross-correlation value of the phase-controlled specific frequency component signal and the input image signal. A watermark information estimation unit filters the cross-correlation value to detect watermark information embedded in the input image signal.
    Type: Application
    Filed: May 23, 2007
    Publication date: September 27, 2007
    Inventors: Wataru Asano, Shinichiro Koto, Tomoo Yamakage