Patents by Inventor Yoshiyuki Sasaki

Yoshiyuki Sasaki 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: 8526283
    Abstract: A method, apparatus and computer-readable recording medium are disclosed, for recording information in an information recording medium. The method includes a first step of outputting, in response to an initialization request for initializing the information recording medium, termination information indicative of termination of the initialization before the initialization starts, and a second step of starting the initialization at a predetermined timing after the output of the termination information. In this procedure, it is possible to start to record data in a blank disc sooner than in conventional methods.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: September 3, 2013
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 8108600
    Abstract: A data storage apparatus, including a controller that formats a rewritable recording medium in the background, interrupts the background formatting when a host computer requests to store data in the rewritable recording medium, stores the data in the rewritable recording medium after interrupting the background formatting, revises control information stored in a predetermined region of the rewritable recording medium after storing the data, and resumes the background formatting after revising the control information. The data storage apparatus according can revise control information indicating the address up to which the background formatting has been performed and the address of an unformatted recording region in which user data have been recorded, for example, at an appropriate timing during the background formatting.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: January 31, 2012
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 8059512
    Abstract: A disk-shaped rewritable information recording medium having at a first recording layer and a second recording layer is disclosed. The information recording medium includes a first data area situated in the first recording layer, the first data area having a plurality of addresses allocated thereto, the plural addresses continuously increasing in a first direction, a second data area situated in the second recording layer, the second data area having a plurality of addresses allocated thereto, the plural addresses continuously increasing in a second direction opposite to the first direction, and a management information area having an area for recording end recorded area information thereto, the end recorded area information including information for identifying an area in the second data area having data that corresponds to an end position of the second data area.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: November 15, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 8009538
    Abstract: An information recording apparatus and method can prevent an information recording medium having a plurality of recording layers from being incompatible with a reproduction-only information recording medium due to an unrecorded area, which is produced by completion of recording in a middle of a data area of the recording layer. The recording layers include at least a first recording layer and a second recording layer, the first recording layer providing a reference with respect to a position of said data area in each of the recording layers. The user data is recorded in response to a recording request. After recording the user data, predetermined data is recorded in a predetermined unrecorded area in the second recording layer.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: August 30, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 8000201
    Abstract: An apparatus for processing information is disclosed. The apparatus requests for recording of user data into an information-recording apparatus for recording in an information-recording medium having multiple recording layers, each of the layers having a data area for recording the user data. The medium has a first recording layer to be a reference for determining a position of the data area in each of the recording layers, and a second recording layer excluding the first recording layer.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: August 16, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7995438
    Abstract: Upon scanning with an optical spot from a first address on the first recording layer as a start point for a second address on the second recording layer which is a target address for reproducing in order to detect a reproduction position, a scanning path for reaching the second address by scanning an already recorded zone of at least one of the first recording layer and the second recording layer is selected from a first scanning path to carry out seeking after a focus jump and a second scanning path to carry out seeking before the focus jump, based on a positional relationship between a known boundary position between a not-yet-recorded zone and an already-recorded zone of the first recording layer or the second recording layer and the first address.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: August 9, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7990808
    Abstract: A method of reproducing information recorded on an optical disc having a plurality of recording layers inclusive of a first recording layer and a second recording layer includes the steps of referring to an order of recording of the first recording layer and the second recording layer according to which information is recorded in a prerecorded area of the optical disc, and selecting a scan path in response to the order of recording, from a first scan path including no seek operation preceding a focus jump and a second scan path including a seek operation preceding a focus jump, to scan an optical spot from a first address in the first recording layer to a second address in the second recording layer through scanning along the prerecorded area in at least one of the first recording layer and the second recording layer.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: August 2, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7983123
    Abstract: A method of defect management for managing on a block-by-block basis a defective area in an information-recording medium is disclosed. The medium has a user-data area, a sparing area, and a defect-management information are. The block is of a predetermined size. The method includes the steps of, when a defective block in which the defective area is included is set to be replaced with a sparing block of the sparing area: dividing the sparing block into multiple subblocks so as to set identifying information, for identifying a sparing subblock in which data are replaced and a non-sparing subblock in which data are not replaced, as defect-management information; and setting block-management information, including information regarding the defective block and the sparing block, and information regarding an area in which non-sparing data not replaced with the sparing block are stored, as defect-management information.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: July 19, 2011
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7808864
    Abstract: An information reproducing method includes the steps o of reading information from an information medium that is rotated, and determining a rotation velocity of the information medium on the basis of a data transfer rate based on a specification of a read request.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: October 5, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7797478
    Abstract: A data storage apparatus, including a controller that formats a rewritable recording medium in the background, interrupts the background formatting when a host computer requests to store data in the rewritable recording medium, stores the data in the rewritable recording medium after interrupting the background formatting, revises control information stored in a predetermined region of the rewritable recording medium after storing the data, and resumes the background formatting after revising the control information. The data storage apparatus according can revise control information indicating the address up to which the background formatting has been performed and the address of an unformatted recording region in which user data have been recorded, for example, at an appropriate timing during the background formatting.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: September 14, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7697835
    Abstract: An imaging apparatus includes an emission device for illuminating a subject, a preliminary emission control device for controlling preliminary emission before photographing, a photometry device for measuring a reflected light volume from the subject in the preliminary emission so as to obtain a photometric result, and a main emission control device for controlling main emission when photographing, the main emission control device has a first emission control for conducting emission by adjusting emission volume by using the photometric result, and a second emission control for conducting emission until the reflected light volume from the subject reaches a predetermined volume, the main emission control device conducts an emission control by either the first emission control or the second emission control according to the photometric result.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: April 13, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7663989
    Abstract: An information recording apparatus that records information on an information recording medium includes a setting mechanism that sets defect management information including information with respect to a specific area in a recording area of the information recording medium in which a defect detection process need not be performed, a recording mechanism that records data in the recording area, and a determining mechanism that determines whether to perform the defect detection process in a recording target area in the recording area in which the data is recorded, based on the defect management information and information with respect to the recording target area. By setting an AV data area as a specific area and by setting a PC data area as a defect management area, the continuity of data recorded in the AV data area is achieved, and the reliability of data recorded in the PC data area is ensured.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: February 16, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7643383
    Abstract: An optical disk having a dual layer layout includes two recording layers each having a data area for recording information. An optical information recording apparatus handles the two data areas of the two recording layers of the optical disk as a single continuous data area and divides the continuous data area into plural divided areas such as sessions and fragments. The optical information recording apparatus then records data on each of the sessions or fragments corresponding to the divided areas.
    Type: Grant
    Filed: September 8, 2004
    Date of Patent: January 5, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7613867
    Abstract: A controller 10 carries out a control such as to divide a cache memory 8 for temporarily storing data when recording and/or reproducing the data on a data recordable optical disk 11, into a plurality of memory areas, i.e., a recording data storage memory area and a verifying data storage area, and storing data therein.
    Type: Grant
    Filed: July 30, 2004
    Date of Patent: November 3, 2009
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7596063
    Abstract: A method of managing a defective area in an information recording medium having a user data area, a replacement area, and a defect management information area is disclosed. The method manages the defective area using a block of a predetermined size as a unit of management. The method includes the step of, at the time of replacing a defective block including the defective area with a replacement block of the replacement area, dividing the replacement block into multiple sub-blocks, and setting identification information for identifying a first one of the sub-blocks to which data is relocated from the defective block and a second one of the sub-blocks to which no data is relocated from the defective block. The identification information is set in defect management information.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: September 29, 2009
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7593297
    Abstract: An information reproducing method includes the steps o of reading information from an information medium that is rotated, and determining a rotation velocity of the information medium on the basis of a data transfer rate based on a specification of a read request.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: September 22, 2009
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7586821
    Abstract: A data storage apparatus, which can format a recording medium in the background, that verifies data written in a designated region of the recording medium if the designated region has not yet been certified in the background, and writes the data in an alterative region of the recording medium if the designated region is found defective. Since the data storage apparatus either certifies the designated region of the recording medium or verifies the data written in the designated region, the data storage apparatus can enhance the reliability of the data written in the recording medium, but the data storage apparatus does not waste time by verifying the designated region of the recording medium two times or more.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: September 8, 2009
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Publication number: 20090194929
    Abstract: A medium delivery apparatus, includes: a medium insertion portion; a medium delivery port; first and second medium guide surfaces; a feed roller; a first pressing member; a second pressing member; a rotating member; an urging member, configured to give an urging force acting in a first rotation direction to the rotating member to rotate the second pressing member toward the protruding position; an elastic member, configured to cause the second pressing member and the rotating member to abut against each other; and a stationary abutting portion, against which the rotating member abuts when the first pressing member is placed in the vicinity of the waiting position.
    Type: Application
    Filed: February 3, 2009
    Publication date: August 6, 2009
    Applicant: Seiko Epson Corporation
    Inventor: Yoshiyuki Sasaki
  • Patent number: 7555626
    Abstract: An information reproducing apparatus reproducing information of an information recording medium is disclosed. In the information recording medium, a record area is divided into a plurality of data areas. Also, data are recorded for each of the divided data areas. In addition, management information relating to the data recording is recorded in a predetermined management information area. Further, the management information is updated and recorded in a new management information area every time a predetermined data recording is completed. A receiving part receives, from an external device, an obtaining request for the management information. The obtaining request includes designation of a specific management information area. A management information obtaining part obtains the management information relating to the data recording from the specific management information area designated in the received obtaining request.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: June 30, 2009
    Assignee: Ricoh Company, Ltd.
    Inventor: Yoshiyuki Sasaki
  • Publication number: 20090147644
    Abstract: An information recording apparatus and method can prevent an information recording medium having a plurality of recording layers from being incompatible with a reproduction-only information recording medium due to an unrecorded area, which is produced by completion of recording in a middle of a data area of the recording layer. The recording layers include at least a first recording layer and a second recording layer, the first recording layer providing a reference with respect to a position of said data area in each of the recording layers. The user data is recorded in response to a recording request. After recording the user data, predetermined data is recorded in a predetermined unrecorded area in the second recording layer.
    Type: Application
    Filed: February 10, 2009
    Publication date: June 11, 2009
    Inventor: Yoshiyuki Sasaki