Patents by Inventor Hiroharu Sato

Hiroharu Sato 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
  • Optical recording medium, information reproduction apparatus and information recording/reproduction
    Publication number: 20070121479
    Abstract: User data recording areas and intermediate areas are alternately arranged on a disk. The intermediate area records at least information for synchronization.
    Type: Application
    Filed: January 29, 2007
    Publication date: May 31, 2007
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideo Ando, Kazuo Watabe, Hiroharu Sato, Toshihiro Sugaya, Chosaku Noda
  • Optical disk medium and optical disk recording and reproducing apparatus
    Patent number: 7196984
    Abstract: A recording data string is composed of a plurality of synchronous frames each of which has synchronous data and coding data. Data items in the coding data contributed to creation of the same column of the error correction code are arranged at regular intervals of E in the recording data string. A data segment length L is obtained by adding an additional synchronous frame to the recording data string. Wherein, a physical segment length A satisfies the equation L=mA, m is a natural number. And A is set indivisible by E.
    Type: Grant
    Filed: February 19, 2004
    Date of Patent: March 27, 2007
    Assignees: Kabushiki Kaisha Toshiba, NEC Corporation
    Inventors: Chosaku Noda, Hiroharu Sato, Hideaki Ohsawa, Yutaka Yamanaka, Kinji Kayanuma, Toshiaki Iwanaga
  • Optical recording medium, information reproduction apparatus, and information recording/reproduction apparatus
    Patent number: 7190663
    Abstract: User data recording areas and intermediate areas are alternately arranged on a disk. The intermediate area records at least information for synchronization.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: March 13, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Kazuo Watabe, Hiroharu Sato, Toshihiro Sugaya, Chosaku Noda
  • Information recording medium and information recording/ reproducing device and method
    Publication number: 20050122890
    Abstract: An information storage medium (1) has tracks in which information is recorded. The tracks are formed as a groove section (2) and a land section (3). The groove section (2) has a synchronous structure in which wobbles (2a) and (2b) formed on both walls of the groove section (2) are not displaced from each other in the circumferential direction of the medium, and the land section (3) has an asynchronous structure in which wobbles formed on both sides of the land section (3) are displaced from each other. A good signal is reproduced from each of the groove and land sections.
    Type: Application
    Filed: March 14, 2003
    Publication date: June 9, 2005
    Inventors: Hideo Ando, Kazuo Watabe, Hiroharu Sato, Hisashi Yamada, Yuuji Nagai, Chosaku Noda, Yutaka Kashihara, Akihito Ogawa, Tadashi Kojima
  • Optical disk medium and optical disk recording and reproducing apparatus
    Publication number: 20040228255
    Abstract: A recording data string is composed of a plurality of synchronous frames each of which has synchronous data and coding data. Data items in the coding data contributed to creation of the same column of the error correction code are arranged at regular intervals of E in the recording data string. A data segment length L is obtained by adding an additional synchronous frame to the recording data string. Wherein, a physical segment length A satisfies the equation L=mA, m is a natural number. And A is set indivisible by E.
    Type: Application
    Filed: February 19, 2004
    Publication date: November 18, 2004
    Inventors: Chosaku Noda, Hiroharu Sato, Hideaki Ohsawa, Yutaka Yamanaka, Kinji Kayanuma, Toshiaki Iwanaga
  • Recording medium, signal recording method and apparatus and signal reproducing apparatus
    Patent number: 6721251
    Abstract: As pit patterns a pattern A and a pattern B are prepared. The adjacent tracks are made to have different embossed pit patterns.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: April 13, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tadashi Kojima, Hiroharu Sato
  • Optical recording medium, information reproduction apparatus, and information recording/reproduction apparatus
    Publication number: 20030048722
    Abstract: User data recording areas and intermediate areas are alternately arranged on a disk. The intermediate area records at least information for synchronization.
    Type: Application
    Filed: September 4, 2002
    Publication date: March 13, 2003
    Inventors: Hideo Ando, Kazuo Watabe, Hiroharu Sato, Toshihiro Sugaya, Chosaku Noda
  • Recording medium, Signal recording method and apparatus and signal reproducing apparatus
    Publication number: 20020136125
    Abstract: As pit patterns a pattern A and a pattern B are prepared. The adjacent tracks are made to have different embossed pit patterns.
    Type: Application
    Filed: September 18, 2001
    Publication date: September 26, 2002
    Inventors: Tadashi Kojima, Hiroharu Sato