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公开(公告)号：DE69024769D1
公开(公告)日：1996-02-22
申请号：DE69024769
申请日：1990-11-29
Applicant: SONY CORP
Inventor： WATANABE TETSU , YAMAGAMI TAMOTSU , KAWASHIMA TETSUJI
IPC: G11B11/10 , G11B11/105 , G11B20/10 , G11B7/00
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公开(公告)号：JP2002269926A
公开(公告)日：2002-09-20
申请号：JP2001062624
申请日：2001-03-06
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI
Abstract: PROBLEM TO BE SOLVED: To improve an average recording speed while keeping the advantageous characteristic at the time of random writing to some extent. SOLUTION: From the innermost circumference of an optical disk 110 up to a specified radius position, the optical disk 110 is rotated at a constant angular velocity by supplying a CAV driving voltage signal to a spindle motor driver 91 via a 2nd low-pass filter 36B, and recording is performed with a recording clock for CAV recording generated based on the variable clock Ckvco synchronized with a clock FMck re-generated from a bi-phase signal FM- demodulated from a wobble signal WOB; and in the outside of the above- specified radius position, the optical disk 110 is rotated at a constant linear velocity by supplying a CLV driving signal to the spindle motor driver 91 via a 1st low-pass filter 36A, and the recording is performed with a recording clock for CLV recording generated based on a reference clock CKref of a specified frequency supplied by a reference clock oscillator 32.
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公开(公告)号：JP2002042407A
公开(公告)日：2002-02-08
申请号：JP2000223891
申请日：2000-07-19
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI , SHISHIDO YUKIO
Abstract: PROBLEM TO BE SOLVED: To suppress the deterioration of access property and data transfer rate by properly selecting a CLV and a CAV for every disk when recording is performed. SOLUTION: The light quantity of the reflection light from a disk is detected (S104) and it is judged whether the disk is re-writable or not based on the reflection light quantity (S105). Then, recording is performed (S107) by controlling the disk to be rotationally driven by the CAV (S106) or the CLV (S108) based on the judgement result. Besides, the rotary driving control of the disk is selected based on whether random recording is possible or not, a recording state in the disk, the presence/absence of an exchange area, a recording start position and whether an initializing processing is required or not, etc.
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公开(公告)号：JP2001273637A
公开(公告)日：2001-10-05
申请号：JP2000093007
申请日：2000-03-28
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI , TSUKADA HIROSHI , MIYAKE KUNIHIKO , OTA SHINJI , SHIOZAWA MASAZUMI
Abstract: PROBLEM TO BE SOLVED: To deal with the increase of a recording capacity by securing the sufficient number of times of power adjusting. SOLUTION: A power calibration area composed of a test area for test writing and a count area for recording the used state of the test area is provided in the disk inner peripheral position of an optical disk, and information is recorded while calibrating laser power. In this case, the total number of test areas in the entire disk is increased in proportion to the increase of an optical disk capacity. For example, in the case of an optical disk corresponding to a double density CD format, the total number of test areas is set in the range of 800 to 1200. In addition, a sufficient data domain is secured by setting the size of each test to a minimum, and the number of count areas to a necessary minimum.
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公开(公告)号：JP2001266351A
公开(公告)日：2001-09-28
申请号：JP2000088601
申请日：2000-03-24
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI , SHISHIDO YUKIO , SAKO YOICHIRO , INOGUCHI TATSUYA
IPC: G11B7/0045 , G11B20/10 , G11B20/12 , G11B20/18
Abstract: PROBLEM TO BE SOLVED: To provide a data recorder and the data recording method capable of complying with an optical disk of a format now in use while appropriately recording or reproducing the data to the optical disk having the increased recording density. SOLUTION: When the data are written into a CD-R having un-multiplied density, blocks for consecutive writing including two runout blocks for every packet are added to these data, and the interleave process is performed such that the maximum delay amount is extended to 108 frames. Meanwhile, when the data are written into a CD-R having twice density, the blocks for consecutive writing including three runout blocks for every packet are added to these data, and the interleave process such that the maximum delay amount is extended to 189 frames, is performed.
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Patent Agency Ranking
公开(公告)号：JP2001236652A
公开(公告)日：2001-08-31
申请号：JP2000050520
申请日：2000-02-22
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI
IPC: G11B7/0045 , G11B7/0037 , G11B7/004 , G11B19/12
Abstract: PROBLEM TO BE SOLVED: To collate an optical disk in accordance with the reproducing method of the reproduction exclusive optical disk. SOLUTION: The system of a tracking error signal is different with respect to a recordable optical disk and the reproduction exclusive optical disk, and the device is provided with a read-out processing part 21 for reading out data from the optical disk, a write-in processing part 22 for writing the data into the optical disk, and a system control part 26 for controlling so that the recordable optical disk wherein the data are recorded by the write-in processing part 22, is collated with the reproducing method according to the specification of the reproduction exclusive optical disk.
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公开(公告)号：JP2001101663A
公开(公告)日：2001-04-13
申请号：JP27742799
申请日：1999-09-29
Applicant: SONY CORP
Inventor： SAKO YOICHIRO , SHISHIDO YUKIO , KAWASHIMA TETSUJI , TSUKATANI SHIGEKI , TOYAMA KATSUMI , INOGUCHI TATSUYA
IPC: G11B20/12 , G11B7/0045 , G11B7/007 , G11B27/10
Abstract: PROBLEM TO BE SOLVED: To provide a recording medium in which address recognition is easily made by a reproducing device of a computer. SOLUTION: Absolute time expression of addresses and binary expression of the addresses are recorded in a relatively less important area such as a zero data region and/or a relative time region among the recording region of additional information such as subcodes and TOC in a CD recording format. For example, frame numbers (addresses) are recorded by using binary expression, which is suitable for a computer use, in a twenty-four bit relative time region and absolute time is expressed by using an eight bit zero data region ZERO and the twenty-four bit absolute time region. In the relative time region, (224-1) addresses are expressed by binary expression. Moreover, absolute time is recorded by absolute time expression in an MSF format same as normal CDs and a 'time' figure in which 1 is added every time a 59 minute 59 second 74 frame is exceeded.
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公开(公告)号：JPH11134671A
公开(公告)日：1999-05-21
申请号：JP29569997
申请日：1997-10-28
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI , KUMAI SATOSHI
Abstract: PROBLEM TO BE SOLVED: To prevent effect from write-on area in evaluating a reproducing system based on a reproducing signal and adjusting the bias of a focusing error signal, etc. SOLUTION: A clock PLCK from a PLL is supplied to a gate circuit 21 and an absolute value signal PDO of a phase error is generated from the circuit 21. A reproducing signal EFM and the output of a D flit-flop are supplied to an exclusive NOR gate 23 and a signal EXO corresponding to the phase error is generated. By utilizing a stipulated format of the write-on area, a SR flip-flop 33 generates a signal LG while being a high level in the write-on area. In a period in which the signal LG is a high level, the output of a NAND gate 24 always becomes a high level and the gate circuit 21 is disabled. Thus, the output of the absolute value signal of phase error is masked. Consequently, control of bias adjustment of a focusing error signal based on the phase error in the write-on area is prohibited.
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公开(公告)号：JPH0869400A
公开(公告)日：1996-03-12
申请号：JP20527894
申请日：1994-08-30
Applicant: SONY CORP
Inventor： IGARASHI TAKUYA , KAWASHIMA TETSUJI
Abstract: PURPOSE: To perform random access in a file by compressing uncompressed data in an uncompressed data file and recording the uncompressed data as a compressed data file by attaching managing information for the random access of the uncompressed data at every uncompressed data unit. CONSTITUTION: The compressed data file 1 is constituted of compressed segment data CSF[o] to [n] in which the uncompressed data UFS[o] to [n] in the uncompressed data file 2 are compressed and the managing information CM[o] to [n] for the random access of the uncompressed data UFS[o] to [n] are attached at every uncompressed data UFS[o] to [n]. The uncompressed data UFS[o] to [n] are the one in which the uncompressed data file 2 is divided by fixed length UFS. Each of the compressed segment data CSF [o] to [n] is provided with the same constitution. In such a way, the uncompressed data is recorded as the compressed data file by attaching the managing information for the random access of the uncompressed data at every uncompressed data unit.
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公开(公告)号：JPH0822682A
公开(公告)日：1996-01-23
申请号：JP17610494
申请日：1994-07-05
Applicant: SONY CORP
Inventor： KAWASHIMA TETSUJI
Abstract: PURPOSE:To shorten the access time by controlling the rotation speed and/or seek speed at the time of seek in accordance with the track address information and in-track address information. CONSTITUTION:An optical pickup 5 is moved from the positions A, D on an optical disk 2 to the access positions A', D' by the control of a system controller 9. At this time, target positions B, E on the disk at the time when the pickup 5 comes to the access positions A', D' after the seek are predicted by the controller 9 in accordance with the respective track address and sector address of the target positions B, E and the pickup 5 right before the seek. Based on these predicted positions, the number of rotation of the disk 2 is controlled by the controller 9 through a servo control circuit 8 so that the target positions B, E come to the positions B', E' where are right before the data access positions A', D', when the pickup 5 comes to the positions A', D'. Thus, the access time is shortened.
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