Using Program Or Address Signal Patents (Class 369/47.31)
  • Patent number: 7085209
    Abstract: A record carrier (1) has a servo track (4) indicating an information track (9) intended for recording information blocks represented by marks, the servo track (4) having a periodic variation of a physical parameter at a first frequency and modulated parts for encoding record carrier information. The modulated parts have a bit synchronization element constituted by a phase modulation of the periodic variation and a data part having data bits of the record carrier information encoded by direct digital modulation. Alternatively, the modulated parts include a second frequency, which is substantially different from the first frequency, for encoding data bits of the record carrier information, the second frequency being a integral multiple N of the first frequency. A recording and/or playback device has a device for recording/reading the information blocks and for reading the record carrier information.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: August 1, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Cornelis Marinus Schep, Aalbert Stek, Hendrik Van Houten
  • Patent number: 7075868
    Abstract: A recording clock generating apparatus for a data recording system includes a wobble signal sampler which samples a wobble signal, from wobble grooves of an optical disk. A first phase comparator provides a first phase-difference signal based on a difference in phase between the wobble signal and a first recording clock signal. A prepit detector detects a prepit signal from prepits of the optical disk. A second phase comparator provides a second phase-difference signal based on a difference in phase between the prepit signal and the first recording clock signal. A phase control signal generator provides a phase control signal based on a sum of the first phase-difference signal and the second phase-difference signal. A clock generator provides a second recording clock signal having a phase corrected in response to the phase control signal provided by the phase control signal generator.
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: July 11, 2006
    Assignee: Ricoh Company, Ltd.
    Inventor: Toshihiro Shigemori
  • Patent number: 7057986
    Abstract: In a recording stop processing method according to an aspect of this invention, when a recording stop instruction is input and the data size of stream data, which is stored in a storage destination, is smaller than the predetermined data size, dummy data is added to the stream data stored in the storage destination, and the stream data with the dummy data, whose data size becomes equal to the predetermined data size, is DMA-transferred to terminate DMA transfer, thus stopping recording of stream data.
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: June 6, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Katsumi Fukuchi
  • Patent number: 7057984
    Abstract: A recording apparatus for improving operability of a DVD camcorder, or the like, that performs recording in a video format. When an instruction for starting recording is given at a first time and then an instruction for stopping the recording is given at a second time, a DVD camcorder is brought into a pause state at the second time. An address and the like of an optical disk at that time are stored in a recording RAM. When an instruction for resuming recording is given at a third time, the address stored in the recording RAM is read, and rerecording is started at a position on the optical disk which position corresponds to the stored address.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: June 6, 2006
    Assignee: Sony Corporation
    Inventor: Shingo Yoshioka
  • Patent number: 7023780
    Abstract: A link writing method for a recordable or rewritable compact disk includes recording a writing interruption address and enabling a succeeding writing process after the writing interruption. Enabling a succeeding writing process includes searching the linking area and enabling a start writing signal and activating a laser power. The method can link a succeeding writing area with a previously written interrupted area with sufficient accuracy to allow the data frame to be successfully processed by error correction within the host drive. The linking area may be positioned by counting the values of the interrupted block, the interrupted data frame, and the interrupted bit count or by detecting a blank area. Other techniques for positioning the linking area include detecting an unwritten area having a length greater than a maximum or writing a characteristic pattern after an interruption.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: April 4, 2006
    Assignee: MediaTek, Inc.
    Inventors: Jyh-Shin Pan, Chao-Long Tsai
  • Patent number: 6992957
    Abstract: A controller of a data recorder that records data on a recording medium such that the occurrence of buffer underrun errors are prevented. Data encoded by an encoder is recorded on the recording medium. A decoder decodes the data recorded on the recording medium. The data recorder interrupts the recording of data when a buffer underrun is likely to occur. The controller restarts the recording of data when the decoded data and the encoded data are synchronized. When the decoded data is delayed from the encoded data, the controller stops the encoding until the decoded data catches up with the encoded data.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: January 31, 2006
    Inventors: Koji Hayashi, Akira Tsukihashi, Yasushi Hanamoto, Tohru Tanaka
  • Patent number: 6982938
    Abstract: A disc device in which recording is possible in a basic recording area in units of a subarea and startable at any position. Even if the recording cannot help stopping due to some external cause during recording on a disc-type recording medium that basically employs real-time sequential recording, the recording is re-openable at the position where the recording stopped when the external cause has disappeared. The disc device includes a reference clock counter that starts to count at the starting point of each basic recording area reference clocks read from the disc, and an address memory that holds an address of the basic recording area under recording. When the recording is stopped due to some external cause, the count of the counter and the address held by the address memory at that time are saved.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: January 3, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuya Ishitobi, Hiroaki Ono
  • Patent number: 6975570
    Abstract: The sector synchronism of a timing generation section for generating data recording/reproducing timing is corrected at the address-mark detection timing of an address-mark detection section. Moreover, even if only one piece of address information having no error is not reproduced in the sector concerned, when at least one piece of address information having no error is reproduced in any of a predetermined number of sectors preceding the subject sector and at least one address mark is detected in the subject sector, the data recording/reproducing is permitted, and thus, the data is recorded/reproduced at a high speed and a high reliability even if an error rate of a physical address is deteriorated.
    Type: Grant
    Filed: July 26, 2000
    Date of Patent: December 13, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Toyoji Gushima, Toshiya Akagi, Chikashi Inokuchi
  • Patent number: 6961301
    Abstract: An optical disk of the present invention includes a pre-recorded region in which pre-recorded data is recorded; a recordable region in which a first clock synchronization mark and first address information are recorded; and a synchronization region having a prescribed length which is positioned between the pre-recorded region and the recordable region.
    Type: Grant
    Filed: March 28, 2001
    Date of Patent: November 1, 2005
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Takeharu Yamamoto, Yoshihiro Kanda, Hiroyuki Yamaguchi, Shinji Inoue
  • Patent number: 6934229
    Abstract: A phase correction circuit includes a phase control data generation circuit which judges whether or not the present sector is a leading sector in an ECC block, which is the minimum recording unit in a magneto-optical disk, and generates phase control data by referring to a phase difference data of a previous sector when the present sector is not the leading sector, based on a phase difference detected by a phase difference detection circuit; and a phase control circuit for controlling the phase of a channel clock based on the output of the phase control data generation circuit. With this structure, it becomes possible to provide the phase correction circuit for a disk reproduction device which can generate a sampling clock even when there is a flaw, etc. in a fixed pattern area of the magneto-optical disk, by making a correction so as to avoid or reduce influence by the flaw, etc., and to provide the disk reproduction device using the circuit.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: August 23, 2005
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tsuneo Fujiwara
  • Patent number: 6891784
    Abstract: An information recording/reproducing apparatus irradiates a light beam on an optical disc on which pre-pits are formed, and performs recording and/or reproduction of information with respect to the optical disc according to a recording clock produced based on a wobble signal and a pre-pit signal. When recording information onto the optical disc having the pre-pits, a light beam is radiated to thereby extract the wobble signal and pre-pit signal. Then, according to the wobble signal and the pre-pit signal, a recording clock signal is produced, and information is recorded based on the recording clock signal. When producing a pre-pit signal, a push-pull signal is produced from the reflected light from the optical disc, and this signal is compared with a reference level to thereby detect a pre-pit. Here, when a pre-pit is not detected, the reference level is changed and the detection processing of the pre-pits is executed again.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: May 10, 2005
    Assignee: Pioneer Corporation
    Inventors: Naoharu Yanagawa, Junji Tanaka, Shin Akabane, Takakazu Sugiyama
  • Patent number: 6842411
    Abstract: Disclosed is a data recording method for an optical disc driver comprising the steps of receiving a data recording command, encoding data to be recorded in a corresponding user region block, storing the encoded data in the unit of an error correction code (ECC) block in a buffer, and recording the data of the ECC blocks if the number of the ECC blocks stored in the buffer is larger than the predetermined number of the ECC blocks. In encoding the data to be recorded, if the data to be recorded is the data in the unit of a sector, the data of the ECC block of the user region corresponding to the sector is reproduced, the data to be newly recorded is inserted into the data of the reproduced ECC block, and the processed ECC block is encoded. If the data to be recorded is the data in the unit of an ECC block, the ECC block data of the user region is not reproduced, but the ECC block to be recorded is encoded.
    Type: Grant
    Filed: December 14, 2000
    Date of Patent: January 11, 2005
    Assignee: LG Electronics, Inc.
    Inventor: Jong In Shin
  • 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
  • Patent number: 6836458
    Abstract: A recording apparatus includes a gate signal generator for generating a gate signal in accordance with the data signal; a pre-pit signal generator for generating a pre-pit signal from a signal read from the recording medium; a gate circuit for generating a pre-pit pulse train by allowing the pre-pit signal to pass therethrough in response to the gate signal; a pulse extractor for extracting pulses of predetermined waveform from the pre-pit pulse train; and a synchronization signal generator for generating a recording synchronization signal based on the pulses of predetermined waveform.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: December 28, 2004
    Assignee: Pioneer Corporation
    Inventor: Masatoshi Adachi
  • Patent number: 6829206
    Abstract: When an error requiring a retry operation has occurred, information concerning the error requiring a retry operation is stored every time. The information includes a sector number (or beginning sector number and number of sectors), the content of the command; a write or read designation, and the number of the times of error occurrence in the sector (or number of the times of retry operation), for example. In case of recording information, like the prior art, information to be written which is stored in a buffer memory is held as it is. Since the information concerning an error requiring a retry operation is stored, even though an error requiring a retry operation occurs repeatedly, a write and/or read operation of the next executable command to another track is executed without immediately switching to the retry operation. Thus, other commands are executed between the occurrence of the error requiring a retry operation and actual execution of the retry operation.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: December 7, 2004
    Assignee: Hitachi, Ltd.
    Inventor: Yoshiju Watanabe
  • Publication number: 20040233803
    Abstract: Conventionally, in a write-once-read-many recording medium, management of recorded/unrecorded areas is required. However, it takes much time to check recorded areas on the whole disk area, and further, the delay of processing is not considered. To solve these problems, information of recorded/unrecorded area management is recorded as a table on a disk, and the table information is regulated so that management information can be efficiently stored. Further, it can be determined whether or not the latest management information is recorded on the disk by using a flag indicating whether or not the table data has been recorded on the disk.
    Type: Application
    Filed: October 30, 2003
    Publication date: November 25, 2004
    Applicants: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventors: Osamu Kawamae, Taku Hoshizawa
  • Publication number: 20040228242
    Abstract: An optical disk recording apparatus operates on an optical disk having circular tracks which are provisionally written with an index signal used for securing a constant linear velocity of the optical disk from an innermost circular track to an outermost circular track, and records data along the circular tracks at different linear densities on different annular zones of the optical disk. In the apparatus, a disk drive section rotates the optical disk while synchronizing the index signal successively read from the rotated optical disk with a predetermined reference clock signal to thereby maintain the constant linear velocity of the circular tracks. A clock generating section multiples or divides the reference clock signal by different rates to generate different writing clock signals in correspondence to the different annular zones of the optical disk.
    Type: Application
    Filed: June 16, 2004
    Publication date: November 18, 2004
    Applicant: Yamaha Corporation
    Inventors: Takuya Tamaru, Tatsuo Fushiki, Katsuichi Osakabe, Yusuke Konagai, Akira Usui, Kentaro Nomoto, Masaki Dojun, Kazuhiko Honda
  • Publication number: 20040202071
    Abstract: When recording to an optical disk under zoned constant linear velocity (ZCLV) or partial constant angular velocity (PCAV) control, a plurality of super link points are dynamically set in the packet link areas. In this way, packet units recorded on a track of the optical disk are kept continuous.
    Type: Application
    Filed: April 8, 2004
    Publication date: October 14, 2004
    Inventors: Chia-Yuan PANG, Ren-Chien FU, Chien-Chun MA
  • Publication number: 20040184374
    Abstract: A controller for a data recorder controls data recording to prevent buffer overrun errors. The data recorder emits a laser beam against a recording medium to record data. The data has a level that determines the power of the laser beam. When there is a possibility of a buffer overrun, the controller interrupts data recording. The controller interrupts data recording when the power of the laser beam is a low level and restarts data recording with the laser beam generated at the low level.
    Type: Application
    Filed: March 31, 2004
    Publication date: September 23, 2004
    Applicant: Sanyo Electric Co., Ltd., a Japanese corporation
    Inventor: Koji Hayashi
  • Publication number: 20040165497
    Abstract: A decoder for improving efficiency of demodulation of address information, which is recorded by performing phase-modulation on the wobble of a groove. The decoder demodulates the address information based on the phase inversion pattern of an ADIP, which is detected using a first clock signal generated by a digital PLL circuit, until an analog PLL circuit is locked. The decoder demodulates the address information based on the phase inversion pattern of the detected ADIP using a second clock signal, which is generated by the analog PLL circuit, after the analog PLL circuit is locked.
    Type: Application
    Filed: February 20, 2004
    Publication date: August 26, 2004
    Inventor: Hideki Hirayama
  • Publication number: 20040160869
    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: Application
    Filed: February 19, 2004
    Publication date: August 19, 2004
    Applicant: LG Electronics Inc.
    Inventor: Dae Young Kim
  • Publication number: 20040156283
    Abstract: An information recording apparatus includes: a unit for applying a predetermined processing to record information divided into error correction units and generating processed record information including a plurality of record units; and a unit for recording the processed record information on an information record medium; a unit for recording, after the recording of the processed record information, predetermined dummy information of an information amount corresponding for the plurality of record units, on the information record medium, subsequent to the processed record information recorded.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 12, 2004
    Inventors: Kazuo Kuroda, Toshio Suzuki
  • Publication number: 20040151102
    Abstract: An apparatus for preventing a writing error from occurring on an optical disc. The apparatus includes an interpolation ATIP sync signal detector, a number determiner, and a writing speed adjuster. The interpolation ATIP sync signal detector receives a wobble signal from a wobble signal generator of an optical disc drive to detect an interpolation ATIP sync signal from the wobble signal. The number determiner determines a number of interpolation ATIP sync signals and generates a writing speed transformation control signal based on the determination result. The writing speed adjuster receives the writing speed transformation control signal from the number determiner to adjust a writing speed of the optical disc drive.
    Type: Application
    Filed: December 23, 2003
    Publication date: August 5, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD
    Inventors: Jae-Hee Moon, Seung-Beom Lee
  • Publication number: 20040136287
    Abstract: A recording clock generating apparatus for a data recording system includes a wobble signal sampler which samples a wobble signal, from wobble grooves of an optical disk. A first phase comparator provides a first phase-difference signal based on a difference in phase between the wobble signal and a first recording clock signal. A prepit detector detects a prepit signal from prepits of the optical disk. A second phase comparator provides a second phase-difference signal based on a difference in phase between the prepit signal and the first recording clock signal. A phase control signal generator provides a phase control signal based on a sum of the first phase-difference signal and the second phase-difference signal. A clock generator provides a second recording clock signal having a phase corrected in response to the phase control signal provided by the phase control signal generator.
    Type: Application
    Filed: December 29, 2003
    Publication date: July 15, 2004
    Inventor: Toshihiro Shigemori
  • Publication number: 20040130985
    Abstract: A high-speed optical recording apparatus for generating a write signal according to an input RLL modulated waveform to control a writing power of a pickup. The high-speed optical recording apparatus contains a rough delay element, which generates rough delay parameters and fine delay parameters according to a set of write strategy parameters and delays the EFM waveform generating a first delay signal. The high-speed optical recording apparatus also contains a fine delay chain, which includes a plurality of delay cells in serial connection. Each delay cell delays the first delay signal by a predetermined time period. The fine delay chain delays the first delay signal according to the fine delay parameter to generate the write signal.
    Type: Application
    Filed: August 22, 2003
    Publication date: July 8, 2004
    Inventor: Ming-Yang Chao
  • Publication number: 20040125718
    Abstract: An information recording/reproducing apparatus and information reproducing method capable of swiftly completing to record information data even under influence of an external disturbance or the like. According to a demodulated timing pulse, a synchronization signal and address data representative of an address is demodulated from a readout signal. An error correction process is carried out on the address data, to obtain corrected address data. Determination is made as to whether or not the corrected address data is a correct address. In this process, in the case the synchronization signal has a period equal to a predetermined period, a synchronization process is executed to place the demodulated timing pulse in synchronism with the synchronization signal, wherein, when the corrected address data is determined as a correct address, then the re-synchronization process is put into stand-by for execution until the corrected address data is determined as an incorrect address.
    Type: Application
    Filed: November 5, 2003
    Publication date: July 1, 2004
    Applicant: Pioneer Corporation
    Inventor: Hideki Kobayashi
  • Patent number: 6757239
    Abstract: On an optical disk medium according to the present invention, address information is recorded along a wobbling track groove 2. The track groove 2 is made up of a plurality of unit sections 22, 23. Each of these unit sections 22, 23 has side faces that are displaced periodically in a disk radial direction. This displacement oscillates at a single period in a tracking direction. However, the displacement pattern differs depending on “each bit of address information (subdivided information)” allocated to each of the unit sections 22, 23.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: June 29, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Minamino, Atsushi Nakamura, Shigeru Furumiya, Hiromichi Ishibashi, Takashi Ishida, Toyoji Gushima
  • Patent number: 6754149
    Abstract: An encoder & decoder unit for encoding data to be recorded has a data-supply-start-signal-generating circuit for generating an ATTX signal requesting that an operation to supply the data to be recorded to the encoder & decoder unit be started by counting 88.5 frames starting at detection of the rising edge of a 1F•START signal by an address decoder. The encoder & decoder unit also includes a laser-power-switching-signal-generating circuit for generating an ATRECP signal making a request for switching of a laser power by counting 49 frames starting at detection of the rising edge of an FD•START signal by the address decoder. A system controller thus needs to generate an RECXPB signal requesting that a recording operation from the next cluster be started only at a precision of about 2 seconds with respect to the period of 1 cluster.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: June 22, 2004
    Assignee: Sony Corporation
    Inventors: Keiji Morikawa, Yuji Saito
  • 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
  • Publication number: 20040114481
    Abstract: An optical information storage medium and a method of recording and/or reproducing information on and/or from the optical information storage medium includes a lead-in area, a user data area, and a lead-out area in which data is recorded. The data that is not modified on storage media complying with the same physical format is recorded in the entire lead-in area or a portion of the lead-in area. A data recording modulation method used in the entire lead-in area or the portion of the lead-in area is different from a data recording modulation method used in a remaining area of the optical information storage medium.
    Type: Application
    Filed: September 2, 2003
    Publication date: June 17, 2004
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Jae seong Shim, Kyung-geun Lee, In-sik Park, Chong-sam Chung, Du-seop Yoon, Byung-in Ma, Hyun-soo Park
  • Patent number: 6751173
    Abstract: In order to provide an optical disk of a small radius suitably used in recording/reproducing data at a high density and an optical disk apparatus capable of according/reproducing information into/from such an optical disk, the optical disk of the present invention uses both the grooves and lands as recording tracks. each recording track is divided into a plurality of sectors each including an address segments ASG 0 and ASG 1, and data segments DSG 0-DSG 52. The address segment 0 (ASG 0) and address segment 1 (ASG 1) respectively have wobbled areas in the opposite side walls, by which the address information is recorded. The data segments are non-wobbled DC grooves. Further, each segment is provided with a clock mark.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: June 15, 2004
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shigemi Maeda
  • Publication number: 20040105367
    Abstract: In an information recording method and apparatus, a sequence of sync frames indicative of data is recorded onto tracks of an optical recording medium. In the recording medium, prepits are formed on lands between the tracks at given intervals, and sync patterns, providing synchronization on a sync-frame basis, are inserted in the sync frames such that each sync pattern has a length in a track direction larger than a length of one of the prepits and a position of each sync pattern matches with a position of at least one of the prepits. Codes that represent sync patterns for the sync frames are selected such that each sync pattern is formed as a space on the recording medium. Modulation codes are generated based on the sync frames in which the selected codes are inserted, by modulating the sync frames containing the selected codes in accordance with a predetermined modulation scheme. A sequence of recording pulses is generated by converting the modulation codes through a predetermined conversion scheme.
    Type: Application
    Filed: November 25, 2003
    Publication date: June 3, 2004
    Inventor: Naruhiro Masui
  • Publication number: 20040081044
    Abstract: The invention provides an information recording medium, a storage medium, an information reproduction apparatus and method, and an information recording and reproduction apparatus and method as well as a providing medium by which information recorded on an information recording medium can be utilized only by a predetermined apparatus which corresponds to the information recording medium. A ROM has data for identification of a DVD player/recorder stored therein. A recording and reproduction section records data stored in the ROM onto a DVD and reproduces data for identification of the DVD player/recorder recorded on the DVD. A CPU controls the recording and reproduction section in accordance with the data stored in the ROM and the data reproduced by the recording and reproduction section.
    Type: Application
    Filed: October 23, 2003
    Publication date: April 29, 2004
    Inventors: Yoichiro Sako, Takashi Sato, Shunsuke Furukawa, Kazunobu Saito, Mitsuru Toriyama, Takao Ihashi
  • Publication number: 20040071060
    Abstract: A high-density optical disc, a method for recording address and/or servo information on the high-density optical disc, and a method for reproducing data recorded on the high-density optical disc. Data is recorded on the high-density optical disc in units of a RUB (Recording Unit Block) having a predetermined size equal to that of an ECC (Error Correction Code) unit. Address information of the RUB and/or Spindle index information of predetermined channel bits needed for a spindle servo control operation are/is recorded in a first linking area or a second linking area of the RUB. Therefore, address information and/or spindle index information can be quickly recognized without using an additional complicated decoding operation during a playback time of an optical disc player, such that a user-desired specific position can be randomly accessed and a CLV-based spindle servo operation can be easily controlled.
    Type: Application
    Filed: August 15, 2003
    Publication date: April 15, 2004
    Inventors: Sang Woon Suh, Jung Bae Park
  • Publication number: 20040057360
    Abstract: An optical disk device that records and reproduces information on/from a recordable optical disk is provided.
    Type: Application
    Filed: September 24, 2003
    Publication date: March 25, 2004
    Inventor: Masahiko Banno
  • Publication number: 20040047251
    Abstract: An optical disk comprises a track groove on which positional information indicating a physical location on the track groove is represented by a wobble shape of the track groove. The optical disk includes a plurality of positional information units that are arranged on the track groove. Each said positional information unit includes: a positional information section that represents the positional information by a combination of wobble patterns selected from multiple types of wobble patterns that have been defined so as to correspond to respective signal waveforms that rise and fall mutually differently; a sync mark section having a wobble pattern in a shape distinguishable from the wobble patterns of the positional information section; and a precision positioning mark section ahead of each said positional information section.
    Type: Application
    Filed: September 12, 2003
    Publication date: March 11, 2004
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Minamino, Atsushi Nakamura, Shigeru Furumiya, Hiromichi Ishibashi, Takashi Ishida, Toyoji Gushima
  • Publication number: 20040042360
    Abstract: In the CAV recording, it is necessary to vary the recording-system clock frequency in accordance with movement of a recording position, and conventionally a signal generated by multiplying a wobble signal is used as the recording-system clock. However, since the wobble signal is easily susceptible to influences of a disk and a pick-up and its quality is prone to be deteriorated by an influence of a large amount of light at the time of recording etc., it is difficult to maintain jitters of the recording-system clock to a sufficiently low value. To resolve this problem, instead of generating a recording-system clock signal from the wobble signal that is susceptible to noise, a necessary recording-system clock frequency is calculated from the address information that has been modulated into the wobble signal and recorded therein, and a signal of this frequency is generated from a stable reference signal source, such as a quartz oscillator, by a synthesizer method and used as the recording-system clock.
    Type: Application
    Filed: May 30, 2003
    Publication date: March 4, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Akio Fukushima, Masayoshi Okawa
  • Patent number: 6700847
    Abstract: A period accumulating portion inputs a reference clock “Clock 2” and a wobbling pulse WBLPOL_I obtained by binarizing a wobbling signal extracted from a reproduction output from a DVD, and accumulates and counts reference clocks “Clock 2” in an interval of predetermined periods of the wobbling pulses WBLPOL_I so as to obtain a count value “m”. An average period detecting circuit obtains an average count value “n” corresponding to the interval of an averaged period of the wobbling pulse by dividing a count value of the reference clock “Clock 2” with a number of the predetermined periods. A divider generates a wobbling pulse WBLPOL_O having a constant period, deprived of a period fluctuation due to a prepit by dividing the reference clock based on the average count value.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: March 2, 2004
    Assignee: Victor Company of Japan, Limited
    Inventor: Yutaka Osada
  • Patent number: 6693862
    Abstract: A recording clock generating apparatus for a data recording system includes a wobble signal sampler which samples a wobble signal, from wobble grooves of an optical disk. A first phase comparator provides a first phase-difference signal based on a difference in phase between the wobble signal and a first recording clock signal. A prepit detector detects a prepit signal from prepits of the optical disk. A second phase comparator provides a second phase-difference signal based on a difference in phase between the prepit signal and the first recording clock signal. A phase control signal generator provides a phase control signal based on a sum of the first phase-difference signal and the second phase-difference signal. A clock generator provides a second recording clock signal having a phase corrected in response to the phase control signal provided by the phase control signal generator.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: February 17, 2004
    Assignee: Ricoh Company, Ltd.
    Inventor: Toshihiro Shigemori
  • Publication number: 20040027947
    Abstract: The invention provides a disk playback device wherein a disk (1) is irradiated with a laser beam from an optical head (4) to reproduce signals from the disk, and which comprises an external synchronizing signal producing circuit (8) and a delay circuit (12) for producing a reproduction synchronizing signal providing reference timing at which a reproduced signal is detected by reading an output signal from the optical head (4), a circuit (7) for detecting the reproduced signal by reading the output signal from the optical head (4) based on the reproduction synchronizing signal, and a system controller (10) for determining an optimum phase for a normal reproduction operation by altering the phase of the reproduction synchronizing signal and executing a reproduction operation, the controller (10) being operable to make a phase adjustment for the reproduction synchronizing signal prepard by the delay circuit (12).
    Type: Application
    Filed: June 10, 2003
    Publication date: February 12, 2004
    Inventors: Kenji Asano, Hideaki Yano, Koichi Tada
  • Publication number: 20040022145
    Abstract: A method and device for recording information signals on a partly recorded writable record carrier (11), e.g. an optical disc. An information signal represents at least one information unit. The record carrier has a recording track which comprises preformed track position information indicative of locations for recording the information units. From the information signal a modulated signal is generated having successive frames, each frame including a synchronizing signal. The modulated signal is recorded at a one of said locations, while maintaining a fixed relationship between the track position information and the synchronizing signals. In the event that the location is after and adjacent to an already recorded location, the recording is started at a link position (31) before the end of a last frame of the earlier recorded information signal at a predefined distance before a first synchronizing signal (30) of the modulated signal.
    Type: Application
    Filed: August 1, 2003
    Publication date: February 5, 2004
    Inventors: Gijsbert Joseph J. Van Den Enden, Johannes H.M. Spruit, Ronald R. Drenten, Jacobus M. Eradus, Johannes J.L.M. Van Vlerken, Robert A. Brondijk, Pope Ijtsma
  • Publication number: 20030210623
    Abstract: In a recording stop processing method according to an aspect of this invention, when a recording stop instruction is input and the data size of stream data, which is stored in a storage destination, is smaller than the predetermined data size, dummy data is added to the stream data stored in the storage destination, and the stream data with the dummy data, whose data size becomes equal to the predetermined data size, is DMA-transferred to terminate DMA transfer, thus stopping recording of stream data.
    Type: Application
    Filed: April 8, 2003
    Publication date: November 13, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventor: Katsumi Fukuchi
  • Publication number: 20030169657
    Abstract: A disc device in which recording is possible in a basic recording area in units of a subarea and startable at any position. Even if the recording cannot help stopping due to some external cause during recording on a disc-type recording medium that basically employs real-time sequential recording, the recording is re-openable at the position where the recording stopped when the external cause has disappeared. The disc device includes a reference clock counter that starts to count at the starting point of each basic recording area reference clocks read from the disc, and an address memory that holds an address of the basic recording area under recording. When the recording is stopped due to some external cause, the count of the counter and the address held by the address memory at that time are saved.
    Type: Application
    Filed: August 30, 2001
    Publication date: September 11, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Tatsuya Ishitobi, Hiroaki Ono
  • Patent number: 6608810
    Abstract: On an optical disk medium according to the present invention, address information is recorded along a wobbling track groove 2. The track groove 2 is made up of a plurality of unit sections 22, 23. Each of these unit sections 22, 23 has side faces that are displaced periodically in a disk radial direction. This displacement oscillates at a single period in a tracking direction. However, the displacement pattern differs depending on “each bit of address information (subdivided information)” allocated to each of the unit sections 22, 23.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: August 19, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junichi Minamino, Atsushi Nakamura, Shigeru Furumiya, Hiromichi Ishibashi, Takashi Ishida, Toyoji Gushima
  • Publication number: 20030133375
    Abstract: An information storage medium has a wobbled groove whose wobble period is modulated by multi-frequency shift keying corresponding to playback control information, and one wavelength of the lowest frequency contained in the multi-frequency shift keying is an integer multiple of a half wavelength of the remaining frequencies contained in the multi-frequency shift keying.
    Type: Application
    Filed: December 27, 2002
    Publication date: July 17, 2003
    Applicant: KABUSHIKI KAISHA TOSHIBA,
    Inventors: You Yoshioka, Hideo Ando, Kazuo Watabe, Shintaro Takehara, Akihito Ogawa, Kazuto Kuroda
  • Publication number: 20030128640
    Abstract: A record carrier (1) is described which has a servo track (4) indicating an information track (9) intended for recording information blocks represented by marks, which servo track (4) has a periodic variation of a physical parameter at a first frequency and modulated parts for encoding record carrier information. The modulated parts have a bit synchronization element constituted by a phase modulation of the periodic variation and a data part comprising data bits of the record carrier information encoded by direct digital modulation. Alternatively the modulated parts comprise a second frequency which is substantially different from the first frequency for encoding data bits of the record carrier information, the second frequency being a integral multiple N of the first frequency. A recording and/or playback device has means for recording/reading the information blocks and for reading the record carrier information.
    Type: Application
    Filed: October 15, 2002
    Publication date: July 10, 2003
    Inventors: Cornelis Marinus Schep, Aalbert Stek, Hendrik Van Houten
  • Publication number: 20030081516
    Abstract: A phase difference detection circuit (270) and a gain adjusting circuit (280) are provided in an optical disc recording apparatus (200). When the phase difference detection circuit detects a phase difference between an ATIP synchronization signal and a recording synchronization signal, this phase difference detection circuit activates an internal counter (271). Then, when phase difference information including a result of a counting operation performed by the internal counter is outputted from the phase difference detection circuit to the gain adjusting circuit, the gain adjusting circuit suitably adjust the frequency division ratio of a (1/N)-frequency-divider (242) according to the received phase difference information. Thus, the phase of a recording clock signal to be supplied from a PLL circuit (240) to a data encoder (260) through a frequency divider (250) is controlled.
    Type: Application
    Filed: September 26, 2002
    Publication date: May 1, 2003
    Applicant: Yamaha Corporation
    Inventors: Susumu Takumai, Yoshihiko Shiozaki
  • Publication number: 20030048710
    Abstract: An optical disk of the present invention includes: a pre-recorded region in which pre-recorded data is recorded; a recordable region in which a first clock synchronization mark and first address information are recorded; and a synchronization region having a prescribed length which is positioned between the pre-recorded region and the recordable region.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 13, 2003
    Inventors: Takeharu Yamamoto, Yoshihiro Kanda, Hiroyuki Yamaguchi, Shinji Inoue
  • Publication number: 20030016602
    Abstract: An optical disk apparatus, which decreases probability of impossibility of correcting an error in reading, is provided, where the error results from deviation of a writing-resuming position in resumption of writing. When an amount of data in a buffer becomes not more than a given amount of data, a buffer-underrun-detecting-circuit judges that the data are in a buffer-underrun-condition. According to the judgement, a writing-interrupting-and-resuming-circuit detects an end position of the last pit for writing, and the position is stored in a time-information-memory, and the optical disk apparatus becomes in a pause condition of writing. When the buffer-underrun-condition is avoided, the optical disk apparatus releases the pause condition of writing, and reads the position of interruption of writing from the time-information-memory, and then synchronizes data written on an optical disk and the data for writing.
    Type: Application
    Filed: June 14, 2002
    Publication date: January 23, 2003
    Inventors: Yasuhiro Wada, Keisuke Umeda, Kenji Utsunomiya, Takayuki Oie, Fuminobu Furukawa
  • Patent number: 6473375
    Abstract: A method and apparatus for recording control for a recording medium having a data recording region for recording data such as audio data, speech data, and a control data region for recording control data for the data recording region. The method and apparatus includes identifying a non-silent recorded portion and a silent recorded portion of the data recorded in the data recording region based upon the signal level of the data recorded in the data recording region, and recording control data for separating the data recorded in the data recording region into temporally former and temporally latter portions at a boundary portion between the non-silent recorded portion and the silent recorded portion based upon the results of the identification after recording of the data in the data recording region has ended.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: October 29, 2002
    Inventor: Junichi Aramaki