Patents by Inventor Shoji Taniguchi

Shoji Taniguchi 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: 7551831
    Abstract: An object of the invention is to provide an optical disc in which the influence of recording interference is reduced to make it possible to narrow the interval between adjacent recording tracks and increase the recording density of information. The optical disc comprises a substrate on which the grooves are formed, a reflecting layer for reflecting an optical beam, a recording layer, and a cover layer for protecting the recording layer, in which the cover layer, the recording layer, the reflecting layer and the substrate are disposed in this order from the side where the optical beam is applied, and the thickness of the recording layer formed in an area opposed to the groove and forming a recording track is greater than the thickness of the recording layer formed in an area opposed to an area on the substrate between two adjacent grooves.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: June 23, 2009
    Assignee: Pioneer Corporation
    Inventors: Eiji Muramatsu, Shoji Taniguchi
  • Patent number: 7548503
    Abstract: In a DVD-R on which information is to be recorded by an information recording apparatus, prior to the recording of the information therein, there are recorded in advance at least identification information for identifying the information recording apparatus for recording the information onto the DVD-R, and recording parameter information containing optimization information for optimizing a recording state in the record processing executed by the information recording apparatus specified by the identification information. Furthermore, the information recording apparatus reads the recording parameter information at the execution of record processing to use it for the record processing.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: June 16, 2009
    Assignee: Pioneer Corporation
    Inventors: Yoshio Sasaki, Satoshi Uchiumi, Hirohisa Tsudome, Kunio Matsumoto, Eiji Muramatsu, Shoji Taniguchi, Akiyoshi Inoue
  • Patent number: 7532557
    Abstract: The present invention provides a recording pulse generating apparatus capable of forming a recording pit having a proper shape even at the time of ultra-high-speed recording of, for example, 8× recording or higher. A recording controller 10 for generating recording pulse signals having lengths corresponding to ten kinds of lengths of pits formed at the time of recording information has a recording controller 10 for generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 4T changes from a first amplitude to a second amplitude, and generating the recording pulse signals so that the amplitude of a recording pulse signal corresponding to a pit having a length of 5T or longer changes from a third amplitude to a fourth amplitude and further changes to a fifth amplitude.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: May 12, 2009
    Assignee: Pioneer Corporation
    Inventors: Akira Shirota, Kunihiko Horikawa, Hiroyuki Uchino, Yoshio Sasaki, Shoji Taniguchi, Eiji Muramatsu
  • Publication number: 20090103407
    Abstract: An information recording medium (100) includes (i) a first recording layer (L0 layer) having a first track and (ii) a second recording layer (L1 layer) having a spiral or coaxial second track sharing the rotation center with the first track. (iii) The first recording layer has a first point (point Bx) indicated by a first address. (iv) The second recording layer has a second point (point Dx) which can be defined according to a predetermined positional relationship (allowable area: 10) with respect to the first point (point Bx).
    Type: Application
    Filed: January 13, 2006
    Publication date: April 23, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Tohru Kanegae, Masahiro Kato, Eisaku Kawano, Masahiro Miura, Shoji Taniguchi
  • Publication number: 20090087171
    Abstract: An optical disc (100) is provided with a recording region where prescribed clock information (WBL) is preformatted for recording. The clock information is (i) included in a first frequency band that is definable by a first reference frequency (Fstd) (that is impossible for a conventional reproducing device to detect by a detecting method based on a self-correlation) and is (ii) defined by a frequency that is integer times the first frequency.
    Type: Application
    Filed: September 22, 2008
    Publication date: April 2, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Akira Shimizu, Masayoshi Yoshida, Tsuyoshi Hasebe, Masahiro Kato, Eisaku Kawano, Shoji Taniguchi, Eiji Muramatsu
  • Publication number: 20090087170
    Abstract: An optical disc (100) is provided with a recording region where prescribed clock information (WBL) is preformatted for recording. The clock information is (i) included in a first frequency band that is definable by a first reference frequency (Fstd) (that is impossible for a conventional reproducing device to detect by a detecting method based on a self-correlation) and is (ii) defined by a frequency that is integer times the first frequency.
    Type: Application
    Filed: September 22, 2008
    Publication date: April 2, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Akira SHIMIZU, Masayoshi YOSHIDA, Tsuyoshi HASEBE, Masahiro KATO, Eisaku KAWANO, Shoji TANIGUCHI, Eiji MURAMATSU
  • Patent number: 7502285
    Abstract: An information recording device is used for recording record information in an information recording medium at least including a first recording layer capable of forming a first recording area and a second recording layer capable of forming a second recording area. The information recording device includes: write elements; acquisition elements for acquiring offset information indicating a relative shift; calculation elements for calculating an address (“Y?=Inv Y??”) indicating a second boundary point opposing to a first boundary point according to the offset information; and control elements for controlling the write elements so as to write record information (i) while making the first boundary point a recording end or start position and (ii) making the second boundary point indicated by the calculated address a recording start or end position.
    Type: Grant
    Filed: October 7, 2005
    Date of Patent: March 10, 2009
    Assignee: Pioneeer Corporation
    Inventors: Masahiro Miura, Masahiro Kato, Shoji Taniguchi, Kazuo Kuroda
  • Publication number: 20090040914
    Abstract: An optical disk (100) comprises recording management areas (103, 113) in which record management data for managing data recording is recorded. The record management data includes (i) physical position information (122, 125, 126) indicating the positions of physical buffer areas in which buffer data for buffering recording operation is physically recorded and (ii) logical position information (121) indicating the position of a logical buffer area in which buffer data is logically recorded or to be recorded.
    Type: Application
    Filed: February 8, 2007
    Publication date: February 12, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Masayoshi Yoshida, Keiji Katata, Takeshi Koda, Shoji Taniguchi, Eiji Muramatsu, Masahiro Kato, Masahiro Miura, Tsuyoshi Hasebe
  • Patent number: 7474601
    Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.
    Type: Grant
    Filed: February 7, 2007
    Date of Patent: January 6, 2009
    Assignee: Pioneer Corporation
    Inventors: Akira Shirota, Kunihiko Horikawa, Eiji Muramatsu, Shoji Taniguchi
  • Publication number: 20090003175
    Abstract: An information recording apparatus (300) is provided with: a first recording device (302 etc.) for recording the first information into a first area of the first layer; a second recording device (302 etc.) for recording the second information into a predetermined area of the second layer; and a controlling device (305) for controlling the second recording device to record the second information by the laser light, while displacing an edge indicating an innermost or outermost circumference of the predetermined area in which a penetrated area penetrated by the laser light is included in the first area, in a direction to approach an edge of the predetermined area in which the penetrated area is not included in the first area, only by a predetermined length corresponding to a tolerance of a change amount indicating a change in the reproduction quality.
    Type: Application
    Filed: January 13, 2006
    Publication date: January 1, 2009
    Applicant: PIONEER CORPORATION
    Inventors: Eisaku Kawano, Masahiro Kato, Akira Shirota, Masahiro Miura, Tohru Kanegae, Shoji Taniguchi, Eiji Muramatsu
  • Publication number: 20080292284
    Abstract: An information recording apparatus (1) is provided with: a recording device (310) for recording record information onto an information recording medium by irradiating the information recording medium (100) with laser light with a recording power according to a set value; a calculating device (340) for preparing correlation information which represents a correlation between the set value and reproduction quality, and for obtaining a reference set value which gives target reproduction quality as being desired reproduction quality, by reproducing test-record information recorded with changing the set value on the recording device; a measuring device (330) for measuring the reproduction quality, by reproducing the record information recorded by using the reference set value on the recording device; and an adjusting device (400) for obtaining adjustment amount of the reference set value on the basis of the correlation information if the reproduction quality measured by the measuring device is different from the ta
    Type: Application
    Filed: September 28, 2004
    Publication date: November 27, 2008
    Applicant: PIONEER CORPORATION
    Inventors: Masahiro Kato, Shoji Taniguchi, Eiji Muramatsu, Kunihiko Horikawa, Toshio Suzuki, Kazuo Kuroda
  • Patent number: 7440369
    Abstract: An information recording device comprising a recording unit that records recording information by applying a laser beam to an information recording medium having a first recording layer for recording recording information by being irradiated with a laser beam and a second recording layer for recording recording information by irradiating with a laser beam via the first recording layer, a calculating unit that calculates an optimum laser beam power when, by using the recording means, trial-recording trial information is recorded by irradiating the second recording layer with a laser beam via a recording-information-unrecorded recording area in the first recording layer and recording information is recorded by irradiating the second recording layer with a laser beam via a recording-information-recorded recording area in the first recording layer, and a control unit that controls the recording unit.
    Type: Grant
    Filed: December 20, 2004
    Date of Patent: October 21, 2008
    Assignee: Pioneer Corporation
    Inventors: Eiji Muramatsu, Kazuo Kuroda, Shoji Taniguchi, Masahiro Kato, Kunihiko Horikawa
  • Publication number: 20080232226
    Abstract: An information recording apparatus has: a recording device for recording information onto an information recording medium, whose recording speed can be changed to first and second linear velocities, by irradiating laser light with a variable recording power; a measuring device for measuring reproduction quality by reproducing the record information recorded at the first linear velocity, if the recording speed is changed from the first linear velocity to the second linear velocity; a first calculating device for calculating a link power which is the recording power which gives the reproduction quality measured by the measuring device in the second linear velocity, on the basis of correlation information for representing a correlation between the recording power in the second linear velocity and the reproduction quality of the record information; and an adjusting device for adjusting the recording power at a time in stages or in continuity.
    Type: Application
    Filed: December 8, 2004
    Publication date: September 25, 2008
    Applicant: PIONEER CORPORATION
    Inventors: Masahiro Kato, Shoji Taniguchi, Eiji Muramatsu, Toshio Suzuki, Kazuo Kuroda, Kunihiko Horikawa
  • Patent number: 7411993
    Abstract: Shift code patterns at four continuous phases obtained by dividing 15 shift code patterns given to the respective flip-flops of a linear feedback shift register of degree 4 into four parts are stored in a code memory (11). Besides, mask code patterns to shift a phase of a PN code (PN) to be generated by every four phases, are stored in a code mask memory (12). Next, a logical operation is performed at a phase shift circuit (13) by using the shift code pattern outputted from the code memory (11) and the mask code pattern outputted from the code mask memory (12), to generate a PN code (PN) having a code length of 15 from a random phase.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: August 12, 2008
    Assignee: Fujitsu Limited
    Inventors: Sumimasa Sunaga, Shoji Taniguchi, Masami Kanasugi, Koichi Kuroiwa
  • Patent number: 7385892
    Abstract: In a DVD-R on which information is to be recorded by an information recording apparatus, prior to the recording of the information therein, there are recorded in advance at least identification information for identifying the information recording apparatus for recording the information onto the DVD-R, and recording parameter information containing optimization information for optimizing a recording state in the record processing executed by the information recording apparatus specified by the identification information. Furthermore, the information recording apparatus reads the recording parameter information at the execution of record processing to use it for the record processing.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: June 10, 2008
    Assignee: Pioneer Corporation
    Inventors: Yoshio Sasaki, Satoshi Uchiumi, Hirohisa Tsudome, Kunio Matsumoto, Eiji Muramatsu, Shoji Taniguchi, Akiyoshi Inoue
  • Publication number: 20080074972
    Abstract: An information recording medium, provided with: a first recording layer (L0 layer) to record therein record information by irradiating laser light (LB); and a second recording layer (L1 layer) to record therein the record information by irradiating the laser light through the first recording layer, the second recording layer having a first calibration area (113) which is to record therein pattern information for obtaining an optimum power of the laser light and which corresponds to a recording area (104) of the first recording layer in which the record information is unrecorded, a head portion of the first calibration area being disposed at a position where it is displaced by a predetermined distance toward a direction of recording the pattern information, on the basis of a head portion of the recording area of the first recording layer in which the record information is unrecorded.
    Type: Application
    Filed: September 7, 2005
    Publication date: March 27, 2008
    Applicant: PIONEER CORPORATION
    Inventors: Kunihiko Horikawa, Kazuo Kuroda, Shoji Taniguchi, Masahiro Kato, Eiji Muramatsu
  • Patent number: 7349316
    Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.
    Type: Grant
    Filed: October 5, 2006
    Date of Patent: March 25, 2008
    Assignee: Pioneer Corporation
    Inventors: Akira Shirota, Kunihiko Horikawa, Eiji Muramatsu, Shoji Taniguchi
  • Publication number: 20080043584
    Abstract: In an information recording medium including at least a first recording layer (L0 layer) capable of recording information and a second recording layer (L1 layer) capable of recording information, an information recording device (300) records information in a predetermined area (12) of the second recording layer by a laser beam which has passed through a transmission area (11) of the first recording layer. The information recording medium (300) includes recording means (302, etc.) for recording the information in the first recording layer or the second recording layer, judgment means for judging whether an unrecorded amount indicating the size of the unrecorded area in the radial direction in the transmission area is smaller than a predetermined amount, and control means used when the unrecorded area is judged to be smaller than the predetermined amount, for controlling the recording means to record information in the predetermined area.
    Type: Application
    Filed: January 13, 2006
    Publication date: February 21, 2008
    Applicant: Pioneer Corporation
    Inventors: Eisaku Kawano, Masahiro Kato, Akira Shirota, Masahiro Miura, Tohru Kanegae, Shoji Taniguchi, Eiji Muramatsu
  • Patent number: 7301873
    Abstract: On a recording medium, the version information indicating a version of the recording standard to which the information recording medium is adapted is recorded. Moreover, the normal recording condition information for recording information at a normal recording speed and the high speed recording condition information for recording the information at a higher recording speed than the normal recording speed are recorded. The recording condition information includes, for example, information about a write strategy for driving a laser light source. At the time of recording, the information recording device compares the version information on the information recording medium with the version information of the information recording device so as to judge whether or not the information can be recorded.
    Type: Grant
    Filed: May 29, 2003
    Date of Patent: November 27, 2007
    Assignee: Pioneer Corporation
    Inventors: Shoji Taniguchi, Eiji Muramatsu
  • Publication number: 20070223340
    Abstract: The information recording apparatus irradiates a laser beam on a recording medium such as an optical disk and forms a recording mark corresponding to a recording signal to record information. A recording pulse signal includes a mark period irradiating the laser beam for forming the recording mark and a space period in which the recording mark is not formed. The mark period has a top pulse period and an intermediate bias period following the top pulse period. The mark period constituted by the top pulse period and the intermediate bias period does not have a continuous part of a plurality of pulses having a small pulse width unlike a pulse train, so that the correct recording mark can be stably formed on the recording medium without an inadequate deformation of a recording pulse shape, even in the case of a high speed recording.
    Type: Application
    Filed: February 7, 2007
    Publication date: September 27, 2007
    Applicant: PIONEER CORPORATION
    Inventors: Akira Shirota, Kunihiko Horikawa, Eiji Muramatsu, Shoji Taniguchi