公开(公告)号：JPH07254235A

公开(公告)日：1995-10-03

申请号：JP4421594

申请日：1994-03-15

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI

IPC: G11B20/18

Abstract: PURPOSE:To obtain an efficient data management technique when suppressed data are recorded in an optical disc drive. CONSTITUTION:A new second ECC adding unit 15 is provided between a data suppressing engine 13 and a first ECC adding unit 17. The second ECC adding unit 15 adds a new error correction code at least to the leading part of compressed data D1a which are block data. That is, as the new error correction code is added to the leading part of the compressed data D1a which is much influenced when an error is produced, the decline of the recording capacity (memory ca pacity) of the compressed data in the actual input data except ECC which are recorded in an optical disc 30 can be suppressed as little as possible and the probability of a phenomenon that a large amount of input data are lost by a small error can be reduced.

公开(公告)号：JPH05151504A

公开(公告)日：1993-06-18

申请号：JP10368692

申请日：1992-03-30

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI ,  NAKAO SHINICHI ,  WACHI SHIGEAKI

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To improve switching characteristics of a driving circuit for a magnetic modulation coil and to obtain effective magnetic force. CONSTITUTION:For instance, when a transistor 6 is turned into the opening state from the conducting state, a collector current of the transistor 6 does not flow. Then, a collector current of the transistor 6 to flow into the coil 11 does not flow either. However, when the current flowing into the coil 11 is changed, counter-electromotive force is generated by the coil 11 in order to cancel this change. In other words, since the direction of decreasing the collector current of the transistor 6 to flow into the coil 11 is the direction A (as shown by an arrow A in the figure), the counter-electromotive force is generated by the coil 11 in the direction B (as shown by an arrow B in the figure). Since the current to flow into the coil 11 is governed by the coil to flow at a constant rate by this counter-electromotive force, when the transistor 6 is turned into the opening state from the conducting state, a transistor 7 under the opening state is instantaneously turned into the conducting state, so that excitation current is instantaneously allowed to flow into coils 8 and 9.

公开(公告)号：JPH0547112A

公开(公告)日：1993-02-26

申请号：JP22373591

申请日：1991-08-09

Applicant: SONY CORP

Inventor： CHIAKI SUSUMU ,  KAWASHIMA TETSUJI ,  KOBAYASHI SHOEI

IPC: G11B11/10 ,  G11B11/105 ,  G11B20/10 ,  G11B20/12

Abstract: PURPOSE:To execute an exact reproduction operation by calculating and optimum offset applied on reproduced signal processing from the signal level of the reproduced signal of a specific pattern signal recorded in a reference recording region at the time of reproduction and applying the values thereof to the reproduced signal of the data recorded in a data recording region. CONSTITUTION:The reproduced signal read out of a magneto-optical disk 1 by an optical head 3 is supplied via a signal processing section 10 to a clamping circuit 11 and is clamped at the saturation level by the reproduced signal from a prewrite region PW provided in the top part of the reference recording region WT at the time of recording in the circuit 11. The optimum gain and optimum offset of the reproduced signal of data byte DB are calculated in a sector unit from this reproduced signal. Even if the level difference of the reproduced signal and offset difference are thereby generated by a difference in various conditions among the disks, the reproduced signal of the data byte DB is always adjusted to the level to most effectively utilize the dynamic range of an A/D converter 16 in correspondence thereto.

公开(公告)号：JPH04370502A

公开(公告)日：1992-12-22

申请号：JP14754891

申请日：1991-06-19

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI ,  CHIAKI SUSUMU ,  SHIMIZU YASUNARI ,  WACHI SHIGEAKI

IPC: G11B5/02 ,  G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To easily detect the operation abnormality of the magnetic head of a magneto-optical disk drive device, etc., through simple configuration. CONSTITUTION:The signal of an RCPC area Da attached to the front part of a write-in signal Si is outputted by switching a switching circuit 22 into a conductive state by a gate signal Sg from a control part 23 as synchronizing with duration in which it flows to the magnetic head 10. Whether the operating state of the magnetic head 10 is abnormal or not is discriminated from the value of this detected voltage by comparators 36, 38 to constitute a window comparator, and its output signal So is obtained.

公开(公告)号：JPH04349220A

公开(公告)日：1992-12-03

申请号：JP2506291

申请日：1991-01-28

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI ,  WACHI SHIGEAKI ,  CHIAKI SUSUMU ,  FUNABASHI TAKESHI ,  SHIMIZU YASUNARI ,  NAKAMURA MASANOBU

IPC: G11B7/00 ,  G11B7/005 ,  G11B20/14

Abstract: PURPOSE:To surely raise a channel clock for an optical disk where the levels of reflected lights are greatly different. CONSTITUTION:This device is provided with an AGC amplifier 21 for controlling the gain of a regenerated RF signal, an off-set circuit 23 for adjusting the off-set value of the output of the AGC amplifier 21 and a control section 29 for controlling and making the output of the above-mentioned off-set circuit 23 selected by a switch 24 within the optimum output range of an A/D converter 25. Thus, when a PLL circuit 28 becomes a lock condition, the above-mentioned switch is changed, the output of a clamp circuit 22 is selected, the PLL, circuit completely becomes a synchoronized state and the channel clock is raised.

公开(公告)号：JPH04184738A

公开(公告)日：1992-07-01

申请号：JP31558190

申请日：1990-11-20

Applicant: SONY CORP

Inventor： FUJITA GORO ,  KAWASHIMA TETSUJI

IPC: G11B11/10 ,  G11B11/105

Abstract: PURPOSE:To lower power consumption, and to reduce the effect of heat generation by intermittently driving laser beams while being synchronized with the timing of a reference clock and irradiating a magneto-optic disc with laser beams while intermittently applying a magnetic field to the magneto-optical disc as being synchronized with the driving timing of laser beams. CONSTITUTION:Laser beams are driven intermittently while the temperature of a magneto-optical disc 1 is elevated to a Curie temperature or higher by the irradiation of laser beams, and a magnetic field is applied from head coils 32 and 33 only for a period when data can be recorded. When the temperature of the magneto-optical disc 1 is lowered to the Curie temperature or lower, currents are not made to flow through the head coils 32 and 33. Accordingly, currents are made to flow through the head coils 32, 33, thus reducing power consumption.

公开(公告)号：JP2010267379A

公开(公告)日：2010-11-25

申请号：JP2010172448

申请日：2010-07-30

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KAWASHIMA TETSUJI ,  SHISHIDO YUKIO ,  TOKUMOTO YOSHIYUKI ,  IFUKU TORU ,  NAGANUMA TAKUSHI ,  ARAI KIYOSHI ,  MAEDA HIDEHO

IPC: G11B7/005 ,  G11B7/007

Abstract: PROBLEM TO BE SOLVED: To reduce formatting time when a disk is ejected, in an optical recording medium that allows data rewriting and has several recording layers.
SOLUTION: Background formatting is performed preferentially from, among a plurality of recording layers, a recording layer where user data is last recorded. For example, when compatibility with a reproduction-only device is required at the time of user data recording only on a first recording layer, in an unrecorded area closer to an inner peripheral side than the tail end position of the user data on the first recording layer, all recording layers need to be formatted (dummy data has been recorded). The background formatting is preferentially performed from the recording layer where the user data is last recorded as described above, only a part of the recording layer for last recording can be formatted during disk eject.
COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：为了减少磁盘弹出时的格式化时间，在允许数据重写并具有多个记录层的光学记录介质中。 解决方案：优先从多个记录层中执行最后记录用户数据的记录层的背景格式化。 例如，在用户数据记录时仅在第一记录层上需要与仅再现设备的兼容性时，比在第一记录上的用户数据的尾端位置更靠近内周侧的未记录区域 层，所有记录层都需要格式化（已记录虚拟数据）。 从如上所述最后记录用户数据的记录层优先进行背景格式化，在磁盘弹出期间仅可以对用于最后记录的记录层的一部分进行格式化。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2006309845A

公开(公告)日：2006-11-09

申请号：JP2005129750

申请日：2005-04-27

Applicant: Sony Corp ,  ソニー株式会社

Inventor： KIKUCHI NOBUTAKA ,  MAEDA HIDEHO ,  MITSUNE NORICHIKA ,  KAWASHIMA TETSUJI ,  OWA HIDEO

IPC: G11B7/0045 ,  G11B7/004 ,  G11B19/12 ,  G11B33/10

Abstract: PROBLEM TO BE SOLVED: To provide a recording and reproducing apparatus having enhanced user-friendliness. SOLUTION: The recording and reproducing apparatus includes an optical disk drive recording prescribed data on a plurality of kinds of optical disks and reproducing data recorded in the optical disks and a hard disk drive performing recording or reproduction of data, the recording and reproducing apparatus is provided with: a selecting means selecting a parameter for optimizing and recording data on the optical disk; and a controlling means performing control so that an identification code of the optical disk read from the optical disk is made to correspond to the parameter selected by the selecting means and recorded in the hard disk drive and that when the identification code of the optical disk is read, the parameter corresponding to the read identification code is read from the hard disk drive and data is recorded on the optical disk based on the read parameter. COPYRIGHT: (C)2007,JPO&INPIT

Abstract translation: 要解决的问题：提供具有增强的用户友好性的记录和再现装置。 解决方案：记录和再现装置包括：在多个光盘上记录规定数据并再现记录在光盘中的数据的光盘驱动器和执行数据的记录或再现的硬盘驱动器，记录和再现 设备具有：选择装置，用于选择在光盘上优化和记录数据的参数; 以及控制装置进行控制，使得从光盘读取的光盘的识别码与由选择装置选择并记录在硬盘驱动器中的参数相对应，并且当光盘的识别码为 读取，从硬盘驱动器读取对应于读取的识别码的参数，并且基于读取的参数将数据记录在光盘上。 版权所有（C）2007，JPO＆INPIT

公开(公告)号：JP2002015549A

公开(公告)日：2002-01-18

申请号：JP2000191617

申请日：2000-06-26

Applicant: SONY CORP

Inventor： TSUKADA HIROSHI ,  KAWASHIMA TETSUJI ,  IIDA MICHIHIKO

IPC: G11B20/12 ,  G11B7/007 ,  G11B7/085 ,  G11B20/10 ,  G11B27/10 ,  G11B27/11 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/32

Abstract: PROBLEM TO BE SOLVED: To perform conversion processing between a first address and a second address, efficiently and at a high speed. SOLUTION: When recording and reproducing an information signal in response to a request from a host device, the address conversion of the first address defined by time-axis information and the second address defined by continuous binary digits is performed reciprocally (S82). At this time, the address conversion processing is performed to the highest value in the time-axis information of the first address and the value of the second address, using the conversion table.

公开(公告)号：JP2001297536A

公开(公告)日：2001-10-26

申请号：JP2000118513

申请日：2000-04-14

Applicant: SONY CORP

Inventor： KAWASHIMA TETSUJI

IPC: G11B7/0045 ,  G11B20/10 ,  G11B20/12 ,  G11B27/19 ,  G11B27/24 ,  G11B27/30 ,  G11B27/32

Abstract: PROBLEM TO BE SOLVED: To set the number of blocks for write connection which does not have meanings as user data as small as possible. SOLUTION: While the user data is subjected to write connection by a fixed length packet system, the user data is recorded to a recording medium and the identification information to this intent is previously written to the recording medium. In reproducing, the identification information is referenced, by which the detection of the position of the blocks for the write connection is made possible and the need for the excess run-out blocks needed heretofore in order to detect the position of the blocks for the write connection is eliminated. The embedment of the segments where the data of the run-in blocks lack in performing the write connection with the correct data is made possible and the correct reproduction of the line blocks is made possible, by which the need for the excess run-in blocks is eliminated.