Indexing To Discrete Signal Tracks (e.g., Consecutive, By Chance) Patents (Class 369/98)
  • Patent number: 7403465
    Abstract: Data is written on a plurality of data tracks on an optical disk by a plurality of laser beams. The spots illuminated by the beams are spaced apart to prevent thermal interference. The spots are aligned along a line at an angle to the tangent of the data tracks. The angle of the line of spots is determined by an equation using variables that include the track pitch, the minimum distance between spots and the difference in track numbers between tracks being written.
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: July 22, 2008
    Assignee: Dragsholm Wireless Holdings LLC
    Inventors: Steven R. Rogers, Alexander Libinson
  • Patent number: 6732192
    Abstract: A system for recording data to a disc shaped record medium. The data is recorded according to a universal disc format employing a hierarchical file system, and data within the hierarchical structure is referenced using pointer information. The pointer information includes a file identifier descriptor and a file entry and is recorded such that the pointer information and its corresponding substantive data are stored at successive addresses.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: May 4, 2004
    Assignee: Sony Corporation
    Inventors: Hirofumi Todo, Makoto Yamada
  • Patent number: 5872712
    Abstract: A method and apparatus for audibly indicating when a predetermined location has been encountered in stored data is disclosed. A predetermined location is first identified. An audible indicator associated with the predetermined location is then generated when the predetermined location is encountered. The predetermined location can be an electronic bookmark, a section boundary or a program boundary. The invention includes a method and apparatus for audibly setting an electronic bookmark in stored data by selecting a location within the stored data, associating an electronic bookmark with the location, and generating an audible message for the electronic bookmark.
    Type: Grant
    Filed: June 13, 1997
    Date of Patent: February 16, 1999
    Assignee: Audible, Inc.
    Inventors: Scott A. Brenneman, Timothy Mott, Leon D. Segal
  • Patent number: 5426758
    Abstract: A method and system for enhancing the efficiency of data accessing within a storage subsystem which is coupled to a host system via a storage subsystem controller and a data channel. The storage subsystem controller preferably includes a tracked cyclic storage device which has multiple disks which are rotatable about a single spindle. Recording tracks within each disk are then accessed utilizing multiple switchable transducer heads. A signal transmitted from the host system is utilized to define a sequence in which a group of recording tracks are to be accessed. That signal is then utilized to create a transducer head switching table within the storage subsystem controller which lists each recording track to be accessed and an associated control parameter for selecting a particular transducer head to be utilized to access a subsequent recording track.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: June 20, 1995
    Assignee: International Business Machines Corporation
    Inventors: Susan K. Candelaria, Dean L. Hanson, Robert L. Kwok, Kenneth W. Lane, Donald M. Nordahl, Mark A. Reid, William G. Sherman, II
  • Patent number: 4958339
    Abstract: An optical card for storing data includes a base member and a plurality of parallel linear tracks on the base member for storing the data. Address data is recorded alternately on an opposite end of each successive track for storing an identifying code corresponding to the respective track.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: September 18, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Ikuo Koyama, Hajime Ohata
  • Patent number: 4730298
    Abstract: A high density spiral track forming apparatus according to the present invention includes a linear motion mechanism for moving an optical recording system in a radial direction of a disk-shaped substrate, and a length measurement machine for detecting the distance travelled by the optical recording system in the radial direction of the substrate disk. The apparatus further includes a velocity computing device for detecting the travel velocity of the optical recording system according to the detected result of the length measurement instrument, and a velocity control device which detects the difference between the travel velocity of the optical recording system which is detected by the velocity computing device and a predetermined velocity, and controls the linear motion mechanism so as to eliminate that difference.
    Type: Grant
    Filed: September 25, 1984
    Date of Patent: March 8, 1988
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Yoshihiko Takahashi
  • Patent number: 4613962
    Abstract: A device for tracking a movable body along a linear path parallel to a plane includes a linear motor for driving the body along the linear path. The body is mounted, as by rollers, for movement along a guide, such as a pair of parallel guide rails, supported on a base which also supports the motor. To enhance stability of the body during tracking movement, the rollers or other mounts for the body are urged against the guide by the magnetic action of a flux which is separate from the principal flux used to generate thrust for the linear motor and which provides an attractive force against preferably a pair of members, such as steel plates, of high magnetic permeability fixed to the movable body.
    Type: Grant
    Filed: October 6, 1983
    Date of Patent: September 23, 1986
    Assignee: Nippon Kogaku K.K.
    Inventors: Yukio Inoue, Katsumi Mizunoe
  • Patent number: 4607355
    Abstract: A drive system for use in an optical disk file device has a multipolar motor such as a three-phase linear DC motor for positionally controlling a read/write head and driving the same to track an optical disk. Selection of the coils of the motor and phase switching of the coils are stopped while the drive system is in the tracking mode.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: August 19, 1986
    Assignee: Ricoh Company, Ltd.
    Inventor: Hiroshi Koide
  • Patent number: 4523304
    Abstract: A modulation and demodulation system for an optical data recording and reproducing apparatus is disclosed in which, in an optical disc having an optical guide track and capable of recording and reproducing optically, the guide track is divided into a plurality of data sectors and the recording or reproduction or reading is effected by data sector. The modulation system for the data field for recording the data is different from that for the identification field containing identification data such as a track address and a sector address in such a way that the identification field is reproduced at high reliability and high demodulation speed while at the same time recording data at high density in the data field.
    Type: Grant
    Filed: April 14, 1982
    Date of Patent: June 11, 1985
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Isao Satoh, Tomio Yoshida, Shunji Harigae, Kenji Koishi
  • Patent number: 4495608
    Abstract: A device for rapidly moving an optical pick-up device in an optical reproducing apparatus to a desired position on a record disc having a plurality of record tracks with an information signal recorded therein, includes a tracking error signal generating circuit for producing a tracking error signal corresponding to deviation of the pick-up device from the center of each record track; a drive device for moving the pick-up device in a direction transverse to the record tracks; and a track jump signal forming circuit for producing a track jump signal comprised of a drive signal followed by a brake signal, in response to the tracking error signal, the drive signal having a duration corresponding to the number of tracks traversed by the pick-up device and the brake signal having a duration corresponding to the speed of movement of the optical pick-up device in traversing the tracks, and for supplying the track jump signal to the drive device to control the latter to rapidly move the optical pick-up device in a dir
    Type: Grant
    Filed: January 17, 1983
    Date of Patent: January 22, 1985
    Assignee: Sony Corporation
    Inventors: Shuichi Kimura, Akira Katsuyama
  • Patent number: 4481613
    Abstract: An optical head is mounted on a carrier of a linear motor, and is moved at a high speed to a desired track, i.e., a target position, of an optical disk by the linear motor. In the optical head, a laser oscillator for generating a laser beam, a tracking unit for tracking a laser beam and a focusing unit for focusing a laser beam onto an optical disk are integrally assembled.
    Type: Grant
    Filed: April 30, 1982
    Date of Patent: November 6, 1984
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventor: Tsuneshi Yokota