Patents by Inventor Nobumasa Naito

Nobumasa Naito 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).

  • Signal processing system and information storage medium
    Patent number: 7949071
    Abstract: According to one embodiment, a first encoder encodes main information, a second encoder encodes sub-information, a first modulator modulates a carrier based on an output of the first encoder, a duplicating module duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator amplitude-modulates with ?/(?×(2N)1/2) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is ?2, a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A?B is ?.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: May 24, 2011
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yuji Nagai, Chosaku Noda, Kazuo Watabe, Akihito Ogawa, Kazuto Kuroda, Nobuhisa Yoshida, Nobumasa Naito, Naoki Morishita, Naomasa Nakamura, Hideaki Ohsawa, Hiroharu Sato, Hisashi Yamada, Toshihiko Kaneshige
  • SIGNAL PROCESSING SYSTEM AND INFORMATION STORAGE MEDIUM
    Publication number: 20100135436
    Abstract: According to one embodiment, a first encoder encodes main information, a second encoder encodes sub-information, a first modulator modulates a carrier based on an output of the first encoder, a duplicating module duplicates an output of the second encoder to generate encoded sub-information units, and a second modulator amplitude-modulates an output of the first modulator based on the encoded sub-information units. The second modulator amplitude-modulates with ?/(?×(2N)1/2) being 0.4 or less, wherein a noise power of a transmission path or a storage medium is ?2, a number of the encoded sub-information units is N, signal levels after amplitude modulation, which correspond to bit 1 and bit 0 of the encoded sub-information units, are A and B, and a level difference A?B is ?.
    Type: Application
    Filed: November 25, 2009
    Publication date: June 3, 2010
    Inventors: Yuji NAGAI, Chosaku Noda, Kazuo Watabe, Akihito Ogawa, Kazuto Kuroda, Nobuhisa Yoshida, Nobumasa Naito, Naoki Morishita, Naomasa Nakamura, Hideaki Ohsawa, Hiroharu Sato, Hisashi Yamada, Toshihiko Kaneshige