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1. 发明专利

JP2012104218A Recording method and reproducing method of optical disk 审中-公开
标题翻译：光盘的记录方法和再现方法
公开(公告)号：JP2012104218A
公开(公告)日：2012-05-31
申请号：JP2011282686
申请日：2011-12-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HOSHISAWA HIROSHI , KAWAMAE OSAMU , NAKAJIMA JUNJI
IPC分类号： G11B20/12
摘要： PROBLEM TO BE SOLVED: To provide error processing due to retry and alternate processing achieved in a conventionally overwritable optical disk and a writing system for arranging record data received from a host device at an optional position on a disk regardless of an unrecorded part and a recorded part by a write-once optical disk in which overwriting is physically impossible, such as a CD-R and a DVD-R which are most popular as a recording medium because of keeping on increasing high capacity in recent years.SOLUTION: When digital data is recorded in a nonoverwritable optical disk which has a physical address in a recordable part, a recordable part of the optical disk is divided into a read-in region, a user region and a read-out region by using the physical address, a portion of the read-in region is provided with an information region including a pointer to a list table for managing a logical address to be allocated to the entire user region, and the list table for logical address management is configured by arranging the logical address and a list showing correspondence to a physical address in the user region side by side.
摘要翻译：要解决的问题：提供由于在常规可重写光盘中实现的重试和替代处理而导致的错误处理以及用于将从主机设备接收的记录数据排列在盘上的可选位置的写入系统，而不管未记录的部分如何以及由于不断增加高容量而成为最受欢迎的作为记录介质的CD-R和DVD-R，因此在物理上不可能重写的一次写入光盘的记录部分。解决方案：当将数字数据记录在具有可记录部分中的物理地址的不可擦写光盘中时，光盘的可记录部分被划分为读入区域，用户区域和读出区域通过使用物理地址，读取区域的一部分被提供有包括指向列表表的指针的信息区域，用于管理要分配给整个用户区域的逻辑地址，并且用于逻辑地址管理的列表表是通过布置逻辑地址和与用户区域中的物理地址对应的列表来并排配置。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2001034968A GENERATION DEVICE FOR TRACKING ERROR SIGNAL, AND OPTICAL INFORMATION REPRODUCING APPARATUS PROVIDED WITH IT 失效
公开(公告)号：JP2001034968A
公开(公告)日：2001-02-09
申请号：JP20131899
申请日：1999-07-15
申请人： HITACHI LTD
发明人： NISHIMURA KOICHIRO , NAKAJIMA JUNJI , HIROSE KOICHI
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To realize a phase difference limiting circuit which does not require the control of the limiting time by a register or the like in the phase difference limiting circuit which limits a tracking error signal when an excessive phase difference is input in a tracking error signal generation circuit of a phase difference system. SOLUTION: As a current or a voltage, a current or a voltage which controls an equalizing circuit 14 in an RF signal processing system which changes a frequency characteristic so as to be nearly proportional to the reproducing speed of a recording medium. Thereby, the limiting time of a limiting circuit 12 is controlled so as to be interlocked with the control of the equalizing circuit 14, and the control of the limiting time by a register or the like is not required.

3. 发明专利

JP2000231722A OPTICAL DISK, INFORMATION RECORDING METHOD, AND REPRODUCING DEVICE THEREFOR 失效
公开(公告)号：JP2000231722A
公开(公告)日：2000-08-22
申请号：JP3232899
申请日：1999-02-10
申请人： HITACHI LTD
发明人： NAKAJIMA JUNJI , TAKEUCHI TOSHIFUMI , ENDO HIROSHI
IPC分类号： G11B7/24 , G11B7/00 , G11B7/004 , G11B7/007 , G11B20/10 , G11B20/12
摘要： PROBLEM TO BE SOLVED: To make it possible to reproduce phase pit data without deteriorating the playability even in the case of reproduction by an existing optical disk reproducing device by wobbling tracks in a lead-out area of an optical disk and recording additional information therein. SOLUTION: Among an lead-in area 101, a data area 102, and a lead-out area 103, prescribed information is superimposed and recorded on the lead-out area 103 in addition to information by a fixed data pattern presenting that this area is an lead-out area. Moreover, as for a form of a phase pit string in each area, a pit string 201 in the lead-in area and a pit string in the data area 202 have their pits arranged in the same direction as the tracks, while the lead-out area 203 has the pits arranged snaking with respect to the direction of the tracks. This snaking cycle should be such as its carrier frequency becomes constant in frequency conversion at the time of being reproduced at a prescribed linear velocity.

4. 发明专利

JPH10112042A OPTICAL INFORMATION REPRODUCING DEVICE 失效
公开(公告)号：JPH10112042A
公开(公告)日：1998-04-28
申请号：JP26405596
申请日：1996-10-04
申请人： HITACHI LTD
发明人： NISHIMURA KOICHIRO , NAKAJIMA JUNJI , TAKEUCHI TOSHIFUMI , HIROSE KOICHI , FURUHATA MAKOTO
IPC分类号： G11B7/09
摘要： PROBLEM TO BE SOLVED: To generate the tracking error signals which are idependent of the depths of the pits of a recording medium, have no offset and are generated by two phase correcting means of the device employing a phase difference system having a delaying means for the output of a quadripartite type light receiving cell. SOLUTION: Two pairs of the signals made by the pairs of the outputs of two cells arranged in the four diagonal locations of quadripartite type light receiving cells 18 are respectively inputted to circuit connection switching means 2 and 3 which are respectively controlled from the external. One of the outputs of the means 2 and 3 is inputted to adders 21 and 22 through delaying means 19 and 20 which are controlled from the external and the other output of the means 2 and 3 is directly inputted to the adders 21 and 22. The phase relationship of the two output signals are changed by the depths of the pits of the recording medium. Note that the means 2 and 3 are controlled so that the signals, whose phases are advanced, are inputted to the means 19 and 20. Thus, the phase difference in the two signals is resolved without depending on the depths of the pits, the phases of the signals of the adders 21 and 22 are made equal and the generation of the offset in the tracking error signals is prevented.

5. 发明专利

JPH08221902A WAVEFORM EQUALIZING DEVICE 失效
公开(公告)号：JPH08221902A
公开(公告)日：1996-08-30
申请号：JP2909495
申请日：1995-02-17
申请人： HITACHI LTD
发明人： ISHII JUNICHI , IMADA RITSUO , ISHIBASHI TOSHIAKI , SUZUKI YOSHIO , NAKAJIMA JUNJI
IPC分类号： G11B20/10 , G11B7/00 , G11B7/005 , G11B7/095 , G11B20/14 , G11B20/18
摘要： PURPOSE: To perform information reproduction of high reliability by setting the optimal equalizing coefficient even for the nonlinear distortion of a reproducing signal generated when an optical disk is inclined in an optical disk device. CONSTITUTION: Since a nonlinear distortion generated in a reproducing signal due to the inclined angle of an optical disk is known, an inclined angle detecting circuit 108 detects the inclined angle of the optical disk before the data reproduction. A coefficient arithmetic circuit 109 calculates the optimal equalizing coefficient for the nonlinear distortion based on the inclined angle of the optical disk detected by the inclined angle detecting circuit 108 and outputs it to multipliers 103, 104. Consequently, the equalizing coefficient is optimally set even for the reproducing signal having the nonlinear distortion due to the inclination of the optical disk, the probability of occurrence of erroneous detection of code due to the interference between codes is reduced and highly reliable information reproduction is performed.

6. 发明专利

JP2523144B2 失效
公开(公告)号：JP2523144B2
公开(公告)日：1996-08-07
申请号：JP28953387
申请日：1987-11-18
申请人： HITACHI LTD
发明人： FUKUSHIMA AKIO , NAKAJIMA JUNJI , MIURA YOSHIO , KISHI JUJI
IPC分类号： G11B9/00 , G11B9/14

7. 发明专利

JPH0750017A DISK-SHAPED RECORDING AND REPRODUCING APPARATUS 失效
公开(公告)号：JPH0750017A
公开(公告)日：1995-02-21
申请号：JP19331193
申请日：1993-08-04
申请人： HITACHI LTD
发明人： SUZUKI YOSHIO , INOUE MASAYUKI , TANAKA HISAMITSU , NAKAJIMA JUNJI , SUZUKI MOTOYUKI , FUKUI YUKIO
IPC分类号： G11B7/09
摘要： PURPOSE:To obtain the apparatus, which can perform stable reproduction, even for an optical disk, which can reproduce high-density phase pitch information higher than the reading limit caused by the wavelength of a light source and the aperture of an objective lens. CONSTITUTION:Two secondary luminous fluxes 4b and 4c on the surface of an optical disk are arranged so that the luminous fluxes are offset by 1/2 track pitch or more, e.g. 5/4 or 9/4 track pitch with respect to a main luminous flux 4a. A servo signal is generated from the luminous fluxes. The output power of a laser is switched in response to the kind or the operating mode of the optical disk. Thus, the stable detection of the servo signal can be performed, and the life of the optical disk can be elongated.

8. 发明专利

JPH06259827A MAGNETO-OPTICAL RECORDING MEDIUM AND MAGNETO-OPTICAL REPRODUCING DEVICE 失效
公开(公告)号：JPH06259827A
公开(公告)日：1994-09-16
申请号：JP4804993
申请日：1993-03-09
申请人： HITACHI LTD
发明人： MIYAMOTO MAKOTO , SUZUKI YORIMI , KUREBAYASHI MASAAKI , SUZUKI YOSHIO , ONISHI KUNIKAZU , SASAKI TORU , NAKAJIMA JUNJI
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To provide the magneto-optical disk with which high-quality signals are obtainable even if the line speed of a disk is slow. CONSTITUTION:A specified magnetic field is impressed to the periphery of an irradiation spot 6 at the time of reproducing previously recorded information. The information 9 of a recording layer 2 is transferred to a reproducing layer 1 only in the transfer region 10 which is a part within an irradiated spot 6 heated up to a high temp. by this irradiated spot 6 and the magnetization 3 of the reproducing layer faces one direction exclusive of the transfer region 10. As a result, the length in the major axis direction of the transfer region 1 0 does not increase even if the line speed of the disk falls and, therefore, the resolution of detection is not degraded and consequently, the reproduced signals having the high quality are obtd. even under the slow line speed condition.

9. 发明专利

JPH06236567A TRACKING ERROR DETECTOR AND OPTICAL DISK DEVICE EQUIPPED WITH THE SAME 失效
公开(公告)号：JPH06236567A
公开(公告)日：1994-08-23
申请号：JP2111393
申请日：1993-02-09
申请人： HITACHI LTD
发明人： NAKAJIMA JUNJI , INOUE MASAYUKI , SUZUKI YOSHIO , ONISHI KUNIKAZU
IPC分类号： G11B7/095
摘要： PURPOSE:To provide an optical disk device capable of generating satisfactory tracking error signals for each of plural disks that have different track intervals from each other as the tracking error detector in an optical disk device. CONSTITUTION:A main spot as well as two sets of side spots are irradiated on an optical disk by a diffraction grating more than two surfaces. From four light receiving regions 1a to 1e, on which reflected lights of the side spots are made incident, two kinds of tracking error signals are generated by employing two sets of differential detection systems 2 and 3. At that time, the distance between the respective sets of side spots is optimally set against each of the two kinds of track intervals.

10. 发明专利

JPH04114321A FOCUS SETTING CIRCUIT 失效
公开(公告)号：JPH04114321A
公开(公告)日：1992-04-15
申请号：JP23324790
申请日：1990-09-05
申请人： HITACHI LTD
发明人： SUZUKI MOTOYUKI , MIURA YOSHIO , NAKAJIMA JUNJI , TANAKA HISAMITSU
IPC分类号： G11B7/085
摘要： PURPOSE:To stabilize a focus setting operation by detecting the vicinity of a just focus position according to the presence/absence of a regenerative informa tion signal and using this detected result and the result of detecting the zero cross of a focus error signal. CONSTITUTION:When a distance between an objective lens 5 and a disk 6 is close to the just focus position, a regenerative information signal F is detected and pulse signals G are continuously outputted from a waveform shaping circuit 32. An output H of a monostable multivibrator 33 triggered by this pulse signal G is inputted through an inverter 27 to an FF 28. On the other hand, a zero cross detection circuit 23 detects a zero cross point, where the polarity of a focus error signal A' is changed, and outputs a detection pulse C. This output C is inputted through an AND gate 26 to the set terminal of the FF 28. Next, a switch 31 is turned to an OFF state according to an output E of the FF 28, and a switch 16 is turned to an ON state.

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