By Program Or Address Signal Patents (Class 369/47.54)
  • Patent number: 8953429
    Abstract: An optical disc device includes an optical pickup unit including a semiconductor laser that shines a laser light, a light-receiving unit that receives the return light of the laser light, a high-frequency generating circuit that generates high-frequency signals, a pickup driver that generates a drive signal that drives the semiconductor laser based on the high-frequency signal, a control unit that controls the high-frequency generating circuit such that, in states in which playback of the optical disc is halted while irradiation with the laser light is being performed, the signal level of the high-frequency signal to be superimposed is set at a first signal level other than zero so as to be smaller than in states in which the playback is performed.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: February 10, 2015
    Assignee: Funai Electric Co., Ltd.
    Inventor: Shinji Fujita
  • Publication number: 20140050066
    Abstract: A data storage system (1) comprises: an optical disc (2) having a physical storage space (3) comprising two layers (L0; L1) of physical storage locations, the physical storage space comprising a logical storage space (LSS) which contains storage locations within a first layer (L0) and within a second layer (L1), the storage locations in said logical storage space having contiguously numbered logical addresses (LA); a disc drive (10) capable of writing information in the logical storage space of said optical disc; the disc drive having an address limit memory (12), containing at least a value for a parameter LAmax indicating the maximum value of said logical addresses of the storage locations (4) in said first storage layer (L0); the disc drive (10) being capable of changing the value in said address limit memory (12); and a host device (20), capable of cooperating with said disc drive (10).
    Type: Application
    Filed: October 24, 2013
    Publication date: February 20, 2014
    Applicant: KONINKLIJKE PHILIPS N.S.
    Inventor: Robert A. Brondijk
  • Patent number: 8630157
    Abstract: According to one embodiment, a data reproducing apparatus includes a data recording medium, light source unit, light application unit, photodetector unit and control unit. An address mark string including address marks is formed on the data recording medium. The address marks are spaced from each other by a distance depending on address data. The light application unit is configured to split the light beam into a first branch light beam and a second branch light beam and apply the first and second branch light beams to the address mark string at different angles. The photodetector unit is configured to detect first reflected light beams and second reflected light beams from the address mark string to generate image data. The first and second reflected light beams result from the first and second branch light beams, respectively. The control unit is configured to reproduce address data based on the image data.
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: January 14, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuo Watabe, Akihito Ogawa, Hideaki Okano, Takashi Usui
  • Patent number: 8416653
    Abstract: The directory information on a file system recorded on an optical disc is cached onto a hard disk as a directory table. When accessing a file on the optical disc, a processor references the directory table so as to obtain information related to a position, on the disc medium, where the file to be accessed is located, without accessing the directory information on the optical disc. A disc I/O controller moves a pickup unit to the location indicated by the positional information on the file to be accessed and reads the data on the file. The pickup unit is used to detect signals from the optical disc.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: April 9, 2013
    Assignees: Sony Corporation, Sony Computer Entertainment Inc.
    Inventors: Michinobu Tanaka, Shinichi Tanaka, Hideya Muraoka
  • Publication number: 20120051201
    Abstract: According to one embodiment, a data reproducing apparatus includes a data recording medium, light source unit, light application unit, photodetector unit and control unit. An address mark string including address marks is formed on the data recording medium. The address marks are spaced from each other by a distance depending on address data. The light application unit is configured to split the light beam into a first branch light beam and a second branch light beam and apply the first and second branch light beams to the address mark string at different angles. The photodetector unit is configured to detect first reflected light beams and second reflected light beams from the address mark string to generate image data. The first and second reflected light beams result from the first and second branch light beams, respectively. The control unit is configured to reproduce address data based on the image data.
    Type: Application
    Filed: March 25, 2011
    Publication date: March 1, 2012
    Inventors: Kazuo Watabe, Akihito Ogawa, Hideaki Okano, Takashi Usui
  • Patent number: 8090242
    Abstract: A method and apparatus for reproducing titles are discussed. According to an embodiment, the method includes determining if at least one title satisfies a criterion, using an average length information of a plurality of titles recorded on a recording medium; and reproducing the at least one title if the determining step determines that the at least one title satisfies the criterion.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: January 3, 2012
    Assignee: LG Electronics Inc.
    Inventor: Han Seop Ryu
  • Patent number: 8050159
    Abstract: This document relates to a method of recording data on an optical disc and an optical disc apparatus. The method of recording data on an optical disc may comprise determining a recording speed at which a recording power control operation will be performed based on a recording start position and the amount of data for which recording has been requested, performing the recording power control operation at the determined recording speed, and recording the data for which recording has been requested on the optical disc based on a result of performing the recording power control operation.
    Type: Grant
    Filed: December 3, 2009
    Date of Patent: November 1, 2011
    Assignee: Hitachi-LG Data Storage Korea, Inc.
    Inventor: Sunggoo Chung
  • Patent number: 8009531
    Abstract: A method of recording data onto an optical storage medium includes: before starting recording data onto the optical storage medium from an expected link point on the optical storage medium, setting a current recording condition corresponding to the expected link point according to at least one previous recording condition corresponding to the expected link point; and controlling an operation of recording the data onto the optical storage medium according to the current recording condition.
    Type: Grant
    Filed: October 1, 2009
    Date of Patent: August 30, 2011
    Assignee: Mediatek Inc.
    Inventors: Chia-Hung Lee, Chao-Ming Huang, Jui-Hung Yen
  • Patent number: 7974163
    Abstract: This optical disk device includes a read means which reads data from an optical disk upon which data is recorded at a variable bit rate for each sector. Moreover, this optical disk device includes a buffer memory which sequentially stores data which has been read by the read means, and a replay means which sequentially reads out and decodes data stored in the buffer memory, and replays that data. Furthermore, this optical disk device includes a control means which, when a command for special replay is issued, calculates the address of the sector currently being decoded by the replay means based upon the address of the sector currently being read by the read means, and upon the amount of data stored in the buffer memory. And the control means commands the read means to read out, from the optical disk, a sector to be jumped to.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: July 5, 2011
    Assignee: Funai Electric Co., Ltd.
    Inventor: Satoshi Kamohara
  • Patent number: 7881171
    Abstract: A method for reproducing an optical recording medium includes: determining a kind of optical pick-up device placed to reproduce an optical recording medium; detecting a push-pull signal or a pre-pit signal of an inserted recording medium according to the kind of optical pick-up device; and reproducing the optical recording medium by using an optical pick-up device from which the push-pull signal or the pre-pit signal is detected.
    Type: Grant
    Filed: March 29, 2006
    Date of Patent: February 1, 2011
    Assignee: LG Electronics Inc.
    Inventor: Yun Sup Shin
  • Patent number: 7787336
    Abstract: A signal processing apparatus of an optical disk recording/reproducing apparatus and a signal processing method performed thereby are provided. The signal processing apparatus may include an operational data generation unit for receiving digital signals, filtering received digital signals and outputting filtered signals as operational data and a data arithmetic-operation unit for performing an arithmetic operation on the operational data output by the operational data generation unit in response to a command.
    Type: Grant
    Filed: September 7, 2006
    Date of Patent: August 31, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Soo-yong Kim, Young-hoon Lee
  • Patent number: 7760609
    Abstract: An optical disc apparatus comprises an optical pickup with a thread load, a thread motor for moving the optical pickup, and an inner circumferential switch. When the optical pickup is moved to an innermost circumference of an optical disc to turn on the switch, the pickup is stopped, and the moving direction of the pickup is changed to the outer circumferential side. A driving voltage applied to the motor is gradually increased. The driving voltage, at which the pickup moving to the outer circumferential side causes the switch to be turned off, is set as an automatically adjusted value of the driving voltage applied to the motor. Thereafter, this automatically adjusted value, which corresponds to the thread load, is used to drive the motor. This makes it possible to absorb variations of thread loads and reduce variation in rezero operation, achieving cost reduction, without using a thread sensor.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: July 20, 2010
    Assignee: Funai Electric Co., Ltd.
    Inventor: Takao Mizuno
  • Patent number: 7738330
    Abstract: Congested rewriting in the same area is to be evaded to suppress the tendency towards occurrence of defective areas. When a stream 1 has been recorded, the last written address, representing the last written position, is stored. When recording a stream 2 next, recording is started directly following the position indicated by the last written address for the stream 1. The last written address, corresponding to the last address of the recording position, is stored. If the stream 2 is erased for recording a stream 3, recording is started not at a position directly following the last written address of the stream 1, but from a position directly following the last written address of the stream 2. When the stream 3 has reached the end of a recording area, the next following data is recorded as from a position directly following the stream 1.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: June 15, 2010
    Assignees: Sony Corporation, Koninklijke Philips Electronics N.V., Panasonic Corporation
    Inventors: Masanobu Nakamura, Motoki Kato, Wilhelmus Jacobus Van Gestel, Kaoru Murase, Yoshiho Gotoh, Miyuki Sasaki
  • Patent number: 7706223
    Abstract: An apparatus for and a method of detecting a wobble signal in accordance with a time shift includes comparing a basic wobble signal with reference levels to detect pulses representing the time shift in an analog fashion, and digitally determining a code value for the basic wobble signal on the basis of the widths of the pulses using a channel clock signal and a wobble clock signal. The determined code value is accumulated and serves as a basis on which final wobble data is produced.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: April 27, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jun-ho Huh, Je-kook Kim, Sang-hoon Moon
  • Patent number: 7704408
    Abstract: The present invention provides a resin-molded component for signal reader, which is light in weight and is able to improve the vibration damping property and to increase the resonance frequency, and which is excellent in heat dissipation. Specifically, it provides a resin-molded component for signal reader structured by 55 to 75% by weight of liquid crystalline polymer (A) composed of structural units expressed by general formulae (I) through (IV): —O—Ar1—CO—??(I) —CO—Ar2—CO—??(II) —O—Ar3—O—??(III) —O—Ar4—CO—??(IV) (where, Ar1 is 2,6-naphthalene group, Ar2 is selected from 1,2-phenylene group, 1,3-phenylene group, and, 1,4-phenylene group, Ar3 is selected from 1,3-phenylene group, 1,4-phenylene group, and p,p?-polyphenylene group, and Ar4 is 1,4-phenylene group); 20 to 10% by weight of inorganic hollow sphere (B1); and 25 to 15% by weight of fibrous inorganic filler (B2), and has 1.4 or smaller specific gravity d, 0.5 W/m·K or larger thermal conductivity ?, and 10 GPa or larger flexural modulus.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: April 27, 2010
    Assignee: Polyplastics Co., Ltd.
    Inventor: Hiroki Fukatsu
  • Patent number: 7593299
    Abstract: A verify operation is the one that is carried out to further improve reliability of recorded data. Because recording and reproduction are made repeatedly, however, the same time is consumed for reproduction even if recording is made at a double-speed, for example, and recording is substantially equal to recording at a normal recording speed. The verify operation is effective for further improving reliability but reduces the substantial recording speed to a half. To improve recording performance by automatically turning ON and OFF the verify operation in accordance with disks, medium information called “media ID” unique to a disk is acquired in a read-in area of the optical disk. The existence/absence of the verify operation is determined on the basis of a matrix table of an existence/absence of the verify operation corresponding on the 1:1 basis to each media ID provided in advance to an optical disk drive.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: September 22, 2009
    Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventors: Kenji Akahoshi, Taku Hoshizawa
  • Patent number: 7558172
    Abstract: An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from an inner periphery thereof to an outer periphery thereof, position detecting means for detecting a position on the optical disk so as to record data at the position, judging means for judging which of the zones the position corresponds to by referring to the zone storing means, and controlling means for controlling the device to perform a data-recording by a CLV method to each of the zones specified by the judging means by setting a recording velocity and a recording power for each of the zones so as to enable the data-recording to provide an equal recording density to all of the zones.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: July 7, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Patent number: 7355946
    Abstract: A method of recording data onto an optical disk uses a write strategy that corresponds to the recording features of the optical disk. The method detects a track pitch or storage capacity of a recording medium, adjusts a write strategy according to the detected track pitch or storage capacity wherein the write strategy has been chosen to correspond to the manufacturer of the recording medium, and records input data onto the recording medium using the adjusted write strategy. Accordingly, data quality during later reproduction is improved even though it is recorded onto a non-standard disk that is larger in capacity than the standard.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: April 8, 2008
    Assignee: LG Electronics Inc.
    Inventors: Yong Hee Han, Sung Woo Park
  • Patent number: 7272088
    Abstract: An information recording apparatus records the record data onto an information recording medium, which is provided with wobbled tracks and on which pre-format address information is recorded. The information recording apparatus is provided with: an optical pickup; a detector for detecting a push-pull signal on the basis of an output of the optical pickup; a timing generator for generating a timing signal by detecting the pre-format address information and by detecting a slot unit smaller than a data management unit of the pre-format address information on the basis of a cycle of the push-pull signal; and a system controller for detecting an optimum recording laser power by recording or reproducing a test signal on the tracks while changing a recording laser power on the basis of the timing signal.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: September 18, 2007
    Assignee: Pioneer Corporation
    Inventors: Masayoshi Yoshida, Takeshi Koda, Keiji Katata
  • Patent number: 7106674
    Abstract: In a multi-session disc including both audio session and data session, the data session is correctly recognized and accessed. The reproducing apparatus is a reproducing apparatus of a multi-session disc mixing a session of first type recording first data and a session of second type recording second data different from the first data, comprising an optical pickup for accessing the session of first type and the session of second type, a judging unit for judging a type of the session accessed by the optical pickup, and a limiting unit for limiting the session of first type to a reproducible session when the session of second type judged by the judging unit is present at an access position after the session of first type.
    Type: Grant
    Filed: August 5, 2002
    Date of Patent: September 12, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Shinichi Harigae, Satoshi Endo
  • Patent number: 7068577
    Abstract: In a spin-up process in a disk drive, the values of a PMA counter and a TOC counter are compared with each other with respect to a write-once disk. The PM counter is a adapted to count the number of disks in which information is written in a PMA region, among the disks from which information is theretofore read in the disk drive. The TOC counter is adapted to count the number of disks in which information is not written in the PMA region.
    Type: Grant
    Filed: January 29, 2003
    Date of Patent: June 27, 2006
    Assignee: Funai Electric Co., Ltd.
    Inventor: Naoya Uehigashi
  • Patent number: 7065535
    Abstract: In a method and a device for reading and a method and a device for recording files on a sequential medium as well as the sequential medium itself, in order to enable the use of sequential write-once mediums, the file system descriptor pointing to a current version of a management information area, is recorded on a reserved track being located at the beginning of the volume. Thereby, the management information area is recorded at a location behind files being recorded onto the volume.
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: June 20, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Ronald Marcel Tol, Gerrit Jan Scholl, Wilhelmus Jacobus Van Gestel, Steven Broeils Luitjens
  • Patent number: 7027371
    Abstract: In a rewritable compact disc having a wobble groove on a substrate, crystal and amorphous states of a phase-change recording layer are an unrecorded/erased state and a recorded state, respectively. When the recording layer is exposed to recording light, amorphous marks assuming the recorded state are formed. At any of 2-, 4- and 8-times velocities with respect to a reference velocity (1-times velocity) whose linear velocity is 1.2–1.4 m/s, modulation m11 of a recorded signal when the recording light of approximately 780 nm in wavelength irradiates the recording layer via an optical system with NA=0.5 or 0.55 is 60–80%. A topmost level Rtop of reflectivity of the eye pattern of the recorded signal during retrieving at the 1-times velocity is 15–25%, and a jitter of the individual length of marks and inter-mark spaces during retrieving at 1-times velocity is 35 ns or less.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: April 11, 2006
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Natsuko Nobukuni, Takashi Ohno, Masae Kubo, Michikazu Horie
  • Patent number: 7016279
    Abstract: A recording and/or reproducing method for a record medium, comprising the steps of reading address information from a record medium, the record medium having at least a first area and a second area, data being recordable to the first area, the second area being followed by the first area, the address information representing the position of the second area, detecting an error corresponding to error detection code encoded for the address information that has been read from the record medium, and when the result of the detecting step represents that an error has been detected in the address information that has been read from the record medium, notifying at least a user that the error has been detected.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: March 21, 2006
    Assignee: Sony Corporation
    Inventors: Yoichiro Sako, Mitsuhiro Shimada, Koichi Sato, Tatsuya Inokuchi, Atsuhiro Kumagai
  • Patent number: 7016281
    Abstract: An optical disc that has a recognition mark area behind a recorded area and in which the last data in the recorded area is stably accessed, the recognition mark area can be accessed without bringing about an abnormal state, and the first data in a succeeding recorded area, if it exists, is stably accessed. An unrecorded area (5) is provided outside the recorded area (4) of the optical disc (1). A mark area (6) is provided between the recorded area (4) and unrecorded area (5). A recognition mark area (6d) is provided in the mark area (6) in order to recognize the boundary between the recorded area (4) and the unrecorded area (5). In the mark area (6), first and second buffer areas (6b and 6c) are provided respectively in front of and behind the recognition mark area (6d).
    Type: Grant
    Filed: April 28, 2004
    Date of Patent: March 21, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshihiro Kanda, Mitsurou Moriya, Mitsuteru Fujimoto
  • Patent number: 6987717
    Abstract: An information recording device for writing information in a circumferential direction of a disk-type recording medium, with a substantially constant linear density.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: January 17, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Patent number: 6982940
    Abstract: Heretofore, if the recording mark arranging method in a track is changed, the physical format on the disk is also changed, as in DVD-Rs and DVD-RAMs. This makes it difficult to attain interchangeability between data recorded in a plurality of different recording mark arranging methods. There is provided a method which makes it possible to arbitrarily set a frequency conversion multiplying factor to be used when generating a write clock from a signal obtained by detecting track deformation periodically provided on a recording track, which makes it possible to arbitrarily set a total number of channel bits in a single track, and which thereby implements a plurality of different recording mark arranging methods on disks having the same physical format.
    Type: Grant
    Filed: May 25, 2000
    Date of Patent: January 3, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Hidehiko Kando, Hiroyuki Minemura, Hirofumi Sukeda
  • Patent number: 6952388
    Abstract: The invention relates to a record carrier of a disc-like optically inscribable type, having a preformed track in which an auxiliarily signal comprising a sequence of codes is recorded by means of a preformed track modulation. The codes comprise a sequence of address codes (AC) specifying the addresses of the track portions in which said address codes (AC) are recorded and special codes (SC). The special codes (SC) can be distinguished from said address codes (AC) and specify control data for controlling a recording by a recording device. The record carrier is provided with an extended area (XAA) proceeding a program calibration area (PCA), the extended area (XAA) comprising special codes (SC) representing additional control information for controlling a recording.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: October 4, 2005
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Jakob Gerrit Nijboer, Johannes Gerardus Fredericus Kablau
  • Publication number: 20040264325
    Abstract: The present invention provides a technology for increasing the recording system clock speed for high-speed information recording onto an optical disk or the like without sacrificing the frequency resolution. A necessary recording system clock frequency is calculated from address information that is modulated by a wobble signal and recorded. A crystal oscillator or other stable reference signal source generates a signal having the calculated frequency by a synthesizing method. The generated signal is used as a recording system clock.
    Type: Application
    Filed: June 24, 2004
    Publication date: December 30, 2004
    Applicant: Renesas Technology Corp.
    Inventors: Akio Fukushima, Masayoshi Okawa
  • Publication number: 20040233809
    Abstract: A recording medium, such as a high-density and/or read-only recording medium, such as BD-ROM, capable of preventing unauthorized duplication of data streams, written thereon, onto another medium, such as a BD-RE or BD-R, which includes physical mark information, and to methods and apparatuses for forming, recording, reproducing, and restricting playback of the recording medium to prevent unauthorized duplication.
    Type: Application
    Filed: March 2, 2004
    Publication date: November 25, 2004
    Inventors: Sang Woon Suh, Jin Yong Kim
  • Publication number: 20040233798
    Abstract: Congested rewriting in the same area is to be evaded to suppress the tendency towards occurrence of defective areas. When a stream 1 has been recorded, the last written address, representing the last written position, is stored. When recording a stream 2 next, recording is started directly following the position indicated by the last written address for the stream 1. The last written address, corresponding to the last address of the recording position, is stored. If the stream 2 is erased for recording a stream 3, recording is started not at a position directly following the last written address of the stream 1, but from a position directly following the last written address of the stream 2. When the stream 3 has reached the end of a recording area, the next following data is recorded as from a position directly following the stream 1.
    Type: Application
    Filed: August 29, 2003
    Publication date: November 25, 2004
    Inventors: Masanobu Nakamura, Motoki Kato, Wilhelmus Jacobus Van Gestel, Kaoru Murase, Yoshiho Gotoh, Miyuki Sasaki
  • Patent number: 6791924
    Abstract: An optical disk and compatible optical disk drive enabling erasable (rewritable) optical disks to have the same format and capacity as read-only or (recordable) write-once optical disks. A reference clock track and optional additional prerecorded phase synchronization patters are provided to enable writing of any random sector with frequency and phase matching of a random sector to the preceding and following sectors. The reference clock track and other phase synchronization patterns eliminate the need for preambles and extra space for speed variation. In a first embodiment, a disk has multiple layers, with at least one rewritable data layer and at least one reference layer. A spiral track on a surface of the reference layer has prerecorded patterns to be used for clocking. In a variation of first embodiment, the reference layer is also used for radial tracking control, eliminated the need for predefined tracks in the rewritable data layers.
    Type: Grant
    Filed: July 31, 2001
    Date of Patent: September 14, 2004
    Assignee: Hewlett-Packard Development, L.P.
    Inventors: Marvin S. Keshner, Josh Hogan, Richard E. Elder
  • Patent number: 6757230
    Abstract: An information recording medium of this invention has a spiral track. The spiral track has one or more header fields per round of the spiral track, and a data field located between neighboring header fields. The data field has a variable length corresponding to an integer multiple of a predetermined length Lw so as to minimize a deviation between the n-th header field in a predetermined round of the spiral track, and the n-th header field in a round different from the predetermined round in the track direction.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: June 29, 2004
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Chosaku Noda, Yutaka Okamoto, Yutaka Kashihara, Hideo Ando
  • Patent number: 6754148
    Abstract: In an information recording method and apparatus which is capable of improving a recording density of an optical recording medium, a carrier signal is detected in an optical recording medium preformatted as first unit regions by modulating a synchronous signal dividing a track into first unit regions having a certain volume and address information indicating the first unit regions as time information format, and the address information is restored by the detected carrier signal. The restored address information is converted into a linear code, the converted linear code is counted with a clock signal varied in accordance with a volume of the second unit regions different from a volume of the first unit regions. Logical address information indicating the second unit regions is generated, and a record clock signal varied in accordance with a recording density of the second unit regions is generated, accordingly a recording density of an optical recording medium can improve.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: June 22, 2004
    Assignee: LG Electronics Inc.
    Inventor: Dae Young Kim
  • Patent number: 6754152
    Abstract: Conventionally, as in the case of switching between a DVD-R and a DVD-RAM, when the method of record mark arrangement in a track is changed, the physical format of the disk is also changed. This makes it difficult to ensure compatibility between pieces of data recorded by a plurality of different methods of record mark arrangement. According to the present invention, sector address data and block address data are recorded in each sector by using wobbling or deformation of a recording groove. Then, depending on which address is used, sector data structure is modified, thereby making it possible to select an address data detection and a data structure on a disk in a single physical format depending on the purpose.
    Type: Grant
    Filed: March 13, 2001
    Date of Patent: June 22, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Hidehiko Kando, Harukazu Miyamoto, Takeshi Maeda
  • Patent number: 6751176
    Abstract: An optical disc that has a recognition mark area behind a recorded area and in which the last data in the recorded area is stably accessed, the recognition mark area can be accessed without bringing about an abnormal state, and the first data in a succeeding recorded area, if it exists, is stably accessed. An unrecorded area (5) is provided outside the recorded area (4) of the optical disc (1). A mark area (6) is provided between the recorded area (4) and unrecorded area (5). A recognition mark area (6d) is provided in the mark area (6) in order to recognize the boundary between the recorded area (4) and the unrecorded area (5). In the mark area (6), first and second buffer areas (6b and 6c) are provided respectively in front of and behind the recognition mark area (6d).
    Type: Grant
    Filed: January 12, 2000
    Date of Patent: June 15, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yoshihiro Kanda, Mitsurou Moriya, Mitsuteru Fujimoto
  • Publication number: 20040076101
    Abstract: A high-density read-only optical disc, a method for recording DI (Disc Information) on the high-density read-only optical disc, and a method for reproducing data recorded on the high-density read-only optical disc. The DI recording method for repeatedly recording pit-shaped DI appropriate for the high-density read-only optical disc in a specific recording area contained in a Lead-In or Lead-Out zone more than a predetermined number of times. Therefore, it quickly reads DI recorded in a specific recording area, and normally reproduces data based upon the read DI.
    Type: Application
    Filed: August 15, 2003
    Publication date: April 22, 2004
    Inventors: Sang Woon Suh, Won Bae Joo
  • Publication number: 20040071062
    Abstract: In a multi-session disc including both audio session and data session, the data session is correctly recognized and accessed. The reproducing apparatus is a reproducing apparatus of a multi-session disc mixing a session of first type recording first data and a session of second type recording second data different from the first data, comprising an optical pickup for accessing the session of first type and the session of second type, a judging unit for judging a type of the session accessed by the optical pickup, and a limiting unit for limiting the session of first type to a reproducible session when the session of second type judged by the judging unit is present at an access position after the session of first type.
    Type: Application
    Filed: August 6, 2003
    Publication date: April 15, 2004
    Inventors: Shinichi Harigae, Satoshi Endo
  • 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
  • Publication number: 20040052166
    Abstract: A removable rewritable computer storage has a command set thereon for controlling a standard operation of a computer device. The command set includes a command having an activation field, a function field, a status field, and a results field. A command engine of the computer device reads the activation field to determine an activation condition upon which the command is to be executed. The command engine reads the function field and any associated arguments to determine the function of the command. The command engine reads the status field to determine an executable status of the command. The command engine writes the results of an execution of the command to the results field.
    Type: Application
    Filed: September 16, 2002
    Publication date: March 18, 2004
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Rob Theodrus Udink, Robert Jochemsen, Maarten Peter Bodlaender
  • Patent number: 6671249
    Abstract: For an optical recording medium having a phase change type recording layer on its a substrate and having as read only area and a writable area in a recording area, a data recording method is provided which records data in the writable area. This data recording method comprises a transfer step of transferring program data recorded in the read only area in a practical form to an external computer, and an execution step (step A10) of automatically executing the program data in the external computer to record data in the writable area, which can facilitate manufacturing and reduce the possible of destruction or falsification of ROM data.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: December 30, 2003
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Michikazu Horie
  • Patent number: 6665248
    Abstract: A voice file consists of a plurality of data blocks. Each data block is composed of a plurality of sectors. Playback time information on voice data recorded in the sector is stored in the sector header. A control device creates a management file having the playback time for each block recorded therein from the information on this sector header, and stores it in a RAM or storage medium. When an arbitrary playback time is specified by an input device, which of the data blocks having the specified playback time positioned therein is retrieved by referring to this management file. Then, the playback times of voice data in sectors are calculated sequentially from the first sector of the data block. A sector in which a sum between the calculated playback time and a playback time up to a data block immediately preceding the retrieved data block is coincident with the specified playback time is retrieved, and access to the sector is provided.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: December 16, 2003
    Assignee: Olympus Optical Co., Ltd.
    Inventors: Takafumi Onishi, Hiroaki Miura
  • Publication number: 20030206501
    Abstract: A system and method for controlling the position of an optical head of a disc during high speed recording. In one embodiment of the method, an optical disc has a plurality of tracks. The method comprises implementing CLV recording by said optical drive, determining a wobble signal based on address information contained in said plurality of tracks of said optical disk and determining a wobble clock signal based on said wobble signal. The method further comprises decoding said wobble clock signal by a decoder, said decoder to provide a sync clock signal to an encoder loop circuit, said sync clock signal based on said wobble clock signal generating an encoder clock signal using said encoder loop circuit. In addition, the method comprises comparing said sync clock signal to said encoder clock signal to provide a position command to position the optical head of said optical drive.
    Type: Application
    Filed: May 2, 2002
    Publication date: November 6, 2003
    Inventors: Hubert Song, Akio Tanaka
  • Patent number: 6621783
    Abstract: Upon loading of an optical disk into a CD-R/RW drive, access is first made to a given location within an innermost lead-in area of the optical disk, to retrieve a starting time of the innermost lead-in area from ATIP information. Then, access is made to a starting point of a PMA area of the disk, on the basis of the starting time of the innermost lead-in area, to retrieve PMA information. After that, on the basis of a time interval between adjoining tracks represented by the PMA information, the tracks are divided into a plurality of sessions. Next, access is made to a lead-in area of the last session to determine presence/absence and validity of lead-in information in the last session. Then, only when the lead-in information of the last session is judged to be valid, the lead-in information of the last session is retrieved as valid lead-in information.
    Type: Grant
    Filed: March 28, 2000
    Date of Patent: September 16, 2003
    Assignee: Yamaha Corporation
    Inventor: Morihiro Murata
  • Publication number: 20030156517
    Abstract: In a spin-up process in a disk drive, the counted values of a PMA counter and a TOC counter are compared with each other with respect to a write-once disk. The PM counter is a counter adapted to count the number of disks, in which information is written in a PMA region, among the disks from which information is theretofore read in the disk drive. The TOC counter is a counter adapted to count the number of disks in which information is not written in the PMA region.
    Type: Application
    Filed: January 29, 2003
    Publication date: August 21, 2003
    Applicant: Funai Electric Co., Ltd.
    Inventor: Naoya Uehigashi
  • Publication number: 20030081535
    Abstract: A optical storage disk provides multiple logical disks without the need to physically alter the structure of the optical storage disk. According to one example embodiment of the present invention, a dual-layer data disk is adapted to store data in each of two layers readable by an optical disk reader. A first region of the disk includes data recorded for a first logical disk, and a second region is adapted to store data for a second logical disk, and the first and second regions are located on the two layers. Each of the data logical disks includes a lead-in region and a lead-out region and for data therebetween traversing each of the two layers. The lead-out region of the first logical disk stores pointing data which points to the lead-in region of second logical disk, and the logical disks are not necessarily physically contiguous.
    Type: Application
    Filed: October 31, 2001
    Publication date: May 1, 2003
    Applicant: Koninklijke Philips Electronics N.V.
    Inventor: Kevin Ross
  • Publication number: 20030012103
    Abstract: A recording and/or reproducing method for a record medium, comprising the steps of reading address information from a record medium, the record medium having at least a first area and a second area, data being recordable to the first area, the second area being followed by the first area, the address information representing the position of the second area, detecting an error corresponding to error detection code encoded for the address information that has been read from the record medium, and when the result of the detecting step represents that an error has been detected in the address information that has been read from the record medium, notifying at least a user that the error has been detected.
    Type: Application
    Filed: February 26, 2002
    Publication date: January 16, 2003
    Inventors: Yoichiro Sako, Mitsuhiro Shimada, Koichi Sato, Tatsuya Inokuchi, Atsuhiro Kumagai
  • Publication number: 20030002411
    Abstract: An information reproducing apparatus, in which a disk having correction data recorded thereon is placed, acquires region information indicative of a region corresponding to the correction data after load processing is performed by a ROM loader. Then, under the control of a CPU, the apparatus determines the correction data to be used for correcting a reproducing program based on the region information, reads the correction data from a lead out area or its outer region on the disk, temporarily retains the read correction data in a first RAM or a second RAM, and then stores the correction data to be resident in a nonvolatile first flash memory or a second flash memory, to correct the reproducing program based on the correction data. The information reproducing apparatus thereafter reproduces user data recorded on the disk according to the corrected reproducing program.
    Type: Application
    Filed: June 12, 2002
    Publication date: January 2, 2003
    Inventor: Kazuo Kuroda
  • Publication number: 20020150014
    Abstract: The invention relates to a record carrier of a disc-like optically inscribable type, having a preformed track in which an auxiliarily signal comprising a sequence of codes is recorded by means of a preformed track modulation. The codes comprise a sequence of address codes (AC) specifying the addresses of the track portions in which said address codes (AC) are recorded and special codes (SC). The special codes (SC) can be distinguished from said address codes (AC) and specify control data for controlling a recording by a recording device. The record carrier is provided with an extended area (XAA) proceeding a program calibration area (PCA), the extended area (XAA) comprising special codes (SC) representing additional control information for controlling a recording.
    Type: Application
    Filed: December 11, 2001
    Publication date: October 17, 2002
    Inventors: Jakob Gerrit Nijboer, Johannes Gerardus Fredericus Kablau
  • Patent number: RE39953
    Abstract: A reproducing apparatus for reading, or a recording apparatus for writing, data from or to a disc having pre-formed thereon a pair of concentrical or spiral tracks adjacent to each other and to which a common address is given, is adapted to control the time at which a read or write head is moved from one to the other of the pair of tracks or vice versa.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: December 25, 2007
    Assignee: Sony Corporation
    Inventors: Chiaki Nonaka, Seiji Ohbi, Makoto Yamada, Masahiro Shigenobu