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71. 发明专利

JP2000057705A OPTICAL DISK 失效
公开(公告)号：JP2000057705A
公开(公告)日：2000-02-25
申请号：JP23331499
申请日：1999-08-19
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： ISHIDA TAKASHI , GUSHIMA TOYOJI
IPC分类号： G11B20/14 , G11B7/007 , G11B20/12
摘要： PROBLEM TO BE SOLVED: To enable address information to be read even with high recording density by providing a plurality of recording sectors each including a header region which includes a plurality of address regions each being provided with a postamble region at the end thereof and non-pit data or a space disposed at the end of the postamble region. SOLUTION: A track 1b is formed on an optical disk 1a in a spiral-manner and the track 1b is divided into recording sectors 1c in accordance with a predetermined physical format. The recording sectors 1c are arranged successively in the circumferential direction to form the track 1b. At the head of each of the recording sectors 1c, a header region 2 is provided so as to previously record therein addressing information for reading address information. The header region includes a plurality of address regions and each of the address regions is provided at the end thereof with a postamble region. Data in the address region is modulated, based on the state.

72. 发明专利

JP2000057583A OPTICAL DISK 失效
公开(公告)号：JP2000057583A
公开(公告)日：2000-02-25
申请号：JP22183999
申请日：1999-08-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAGAI TAKAHIRO , AOKI YOSHITO , OHARA SHUNJI , ISHIDA TAKASHI , SATO ISAO , TAKAGI YUJI , KUMON YUJI
IPC分类号： G11B20/12 , G11B7/007 , G11B20/14
摘要： PROBLEM TO BE SOLVED: To reduce the failure of reading an address signal caused by track shifting. SOLUTION: In a sector address area 5, address blocks 16, 17, 18 and 19 including address numbers and ID numbers are alternately shifted between inner and outer peripheral sides by nearly half track pitches from a track center in a radial direction. Thus, address reading is improved from a land/groove recording/reproducing optical disk, and the stability of tracking in a sector address area is improved.

73. 发明专利

JP2000048361A METHOD FOR RECORDING OPTICAL DISK DEVICE, OPTICAL DRIVING METHOD AND OPTICAL DISK DEVICE 失效
公开(公告)号：JP2000048361A
公开(公告)日：2000-02-18
申请号：JP22253899
申请日：1999-08-05
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHOJI MAMORU , MIYAHASHI YOSHIYUKI , ISHIDA TAKASHI , OHARA SHUNJI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/006 , G11B20/12
摘要： PROBLEM TO BE SOLVED: To prevent the destruction of data in spite of the deterioration at the beginning end and terminal of a recording region at the time of repetitively recording the data on an optical disk. SOLUTION: The irradiation power of a laser beam is temporarily lowered than erasing power during recording of the pseudo data 21, 22 to be added to the beginning end and/or terminal of the necessary data in the optical driving method for the optical disk device to execute the recording and reproducing on the optical disk having the recording region to be recorded with the data. The necessary data is not destroyed as the pseudo data is recorded in the deteriorating portion even if the deterioration by the transfer of the recording film constitution material begins from the beginning end and terminal of the recording region in the repetitive recording of the data in this method. The irradiation power of the laser beam is temporarily set at the power smaller than the erasing power during the recording of the pseudo data, by which the region of the largely changing heat conditions is created. The deterioration by the transfer of the recording film constitution material progressing to the inner side from the beginning end and terminal of the recording region is lessened by this region.

74. 发明专利

JPH11219570A DATA RECORDING MEDIUM, DATA RECORDER, DATA REPRODUCING AND METHOD THEREOF 失效
公开(公告)号：JPH11219570A
公开(公告)日：1999-08-10
申请号：JP32663698
申请日：1998-11-17
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： DEGUCHI HIRONORI , ISHIDA TAKASHI , MATSUOKA NAOYA
IPC分类号： G11B20/14
摘要： PROBLEM TO BE SOLVED: To provide a data recording medium suitable for an optical disk, etc., while it is the recording medium capable of writing the data, and further to provide a data recorder for recording/reproducing the data, a reproducing device and the method thereof against such a data recording medium. SOLUTION: The information recording area is divided into plural recording sectors 11, and each recording sector 11 is the optical disk including the data recording part 14z, then code words obtained by 8-16 modulating the data symbol are recorded on data parts 14e, 14y of the data recording part 14z, and the code word is provided with the state information for demodulating the code word just before, and a postamble part 14g is provided just after the data recording part 14z. A postamble pattern including a part of or a whole synchronizing pattern to synchronize at the time of data reproduction is recorded on the postamble part 14g.

75. 发明专利

JPH1166698A OPTICAL DISK DEVICE AND SETTING METHOD FOR ITS CONTROL PARAMETER 失效
公开(公告)号：JPH1166698A
公开(公告)日：1999-03-09
申请号：JP15650598
申请日：1998-06-04
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHOJI MAMORU , NAKAMURA ATSUSHI , ISHIDA TAKASHI , OHARA SHUNJI
IPC分类号： G11B20/10 , G11B7/00 , G11B7/004 , G11B7/125 , G11B19/02
摘要： PROBLEM TO BE SOLVED: To decide an optimum recording focus position in a short time by economizing a rotation waiting time by recording and reproducing continuously a land and a groove track at a set recording focus position when optimum recording focus position before recording data is decided. SOLUTION: In an optimum position deciding means 5, for example, when a first result of a reproduction signal quality detecting means 4 is no good, a higher position than a first recording focus position is set, when a result is all correct, a lower position than the first recording focus position is set, and continuous recording and reproducing of a land and a groove track are performed at this set position. In order to obtain an optimum recording focus position, a recording focus position is gradually changed, recording and reproducing are repeated for each change, and a recording focus position at which a high quality reproduced signal is secured is obtained. At the time, if recording is performed at recording focus positions of four kinds, it takes only a time of 5×4=20 rotations.

76. 发明专利

JPH10208250A OPTICAL DISK DEVICE AND OPTICAL DISK RECORDING /REPRODUCING DEVICE 失效
公开(公告)号：JPH10208250A
公开(公告)日：1998-08-07
申请号：JP4084698
申请日：1998-02-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NAGAI TAKAHIRO , AOKI YOSHITO , OHARA SHUNJI , ISHIDA TAKASHI , SATO ISAO , TAKAGI YUJI , KUMON YUJI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/007 , G11B7/09 , G11B20/12
摘要： PROBLEM TO BE SOLVED: To reduce readout failure by the method that the sector address region has plural address blocks, each of which comprises the part showing plural sector identifying address numbers and the part showing the ID numbers that identifies plural address blocks and, at the time of reproducing sector addresses, the address number and the ID number are read out. SOLUTION: The addresses of group tracks 403b are shown by a pair of address blocks 411b, 801b of the address region 405. These blocks 411b, 801b are located at the shifted position on the opposite sides of the track center 408 of the group track 403b. A laser light spot having moved on the track center 408 of the left-part track 403b moves the right-part track center 408 after passing the blocks 411b and 801b. When the data of the track 403b is reproduced, the information of the two address blocks 411b and 801b having the same value in the address block 405 is reproduced.

77. 发明专利

JPH1031822A DEVICE FOR OPTICALLY RECORDING AND REPRODUCING INFORMATION AND METHOD THEREFOR 失效
公开(公告)号：JPH1031822A
公开(公告)日：1998-02-03
申请号：JP9090497
申请日：1997-04-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MIYAGAWA NAOYASU , SHOJI MAMORU , ISHIDA TAKASHI , FURUMIYA SHIGERU , KUMON YUJI
IPC分类号： G11B7/00 , G11B7/004 , G11B7/007
摘要： PROBLEM TO BE SOLVED: To surely detect an identification data recorded in a header area in reproducing an optical information recording medium adopting an intermediate address system by providing an envelope detecting circuit in a regenerative signal processing circuit. SOLUTION: An information track 2 of the optical information recording medium (optical disk) 1 is irradiated with a light beam as a converged light spot by an optical head 110, and a photodetector 7 has bisected photodetecting surfaces 7a and 7b to be positioned along the direction of extending the information track 2 to receive the light beam reflected by the optical disk 1. The regenerative signal processing part 130 has a header area discriminating means 30, and is operated for generating a difference signal and a sum signal of two outputs obtained from the bisected photodetecting surfaces 7a and 7b. Then, the area discriminating means 30 is equipped with the envelope detecting circuit 22 for detecting an envelope of the difference signal, and when the envelope exceeds a prescribed level, it is decided that the header area is under tracing.

78. 发明专利

JPH0927825A COMPUTER NETWORK COMMUNICATION SYSTEM 失效
公开(公告)号：JPH0927825A
公开(公告)日：1997-01-28
申请号：JP17455495
申请日：1995-07-11
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： YOSHIDA YASUHIRO , TOYONAGA EIICHI , OMURA TAKESHI , ISHIDA TAKASHI
IPC分类号： H04L12/28 , H04L12/825 , H04L12/923 , H04L12/56
摘要： PROBLEM TO BE SOLVED: To improve reliability of data communication in a band common share type computer network in which all computers uses in common a communication band. SOLUTION: This system is provided with a band management information table 201 storing a communication band allocation state required for data communication between optional computers 210-1 and 210-2 connecting to a network 210 and a band management means 202 or the like managing and allocating a communication band based on the band management information table 201. Since a communication band of data communication between optional computers connecting to a band common share computer network is managed, the reliability of data communication is improved, and even in the case of data communication requiring real time performance for a video image or an audio signal or the like, it is realized by the band common share computer network.

79. 发明专利

JPH06274918A HIGH FREQUENCY SUPERIMPOSING CONTROLLER 失效
公开(公告)号：JPH06274918A
公开(公告)日：1994-09-30
申请号：JP6373093
申请日：1993-03-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： MIYAHASHI YOSHIYUKI , OHARA SHUNJI , ISHIDA TAKASHI , SHOJI MAMORU
IPC分类号： G11B7/125
摘要： PURPOSE:To output a faithful signal waveform with a few roundings, and to stably record and reproduce a signal whose waveform length is short by providing a switch which directly inputs the signal currents for recording of a laser output current driving means to a light source by by-passing a current leakage prevention filter at the time of recording. CONSTITUTION:At the time of reproduction/recording, a laser output current driving means 1 outputs signal modulation currents A/B for reproduction/ recording and a reproduction/recording control signal, and switches 3 and 6 are turned on and off/off and on by the control signal. Therefore, at the time of reproduction, the currents A are allowed to pass through a current leakage prevention filter 4, and a semiconductor laser 7 is driven by the currents obtained after the currents A are superimposed on high frequency currents outputted from a high frequency oscillation circuit 2. Also, at the time of recording, the circuit 2 is stopped, and the semiconductor laser 7 is directly driven by the currents B by by-passing the filter 4 by a by-pass circuit 5. Thus, the laser 7 can be driven by the faithful signal waveform with a few roundings, and the signal whose waveform length is short can be stably recorded and reproduced.

80. 发明专利

JPH06274886A OPTICAL DRIVING METHOD FOR OPTICAL DISK DEVICE, OPTICAL DISK DEVICE AND OPTICAL DISK 失效
公开(公告)号：JPH06274886A
公开(公告)日：1994-09-30
申请号：JP6373193
申请日：1993-03-23
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： SHOJI MAMORU , OHARA SHUNJI , ISHIDA TAKASHI , MIYAHASHI YOSHIYUKI
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/0055 , G11B7/125 , G11B7/30 , G11B27/00
摘要： PURPOSE:To obtain the optical driving method for an optical disk device and an optical disk device capable of suppressing the deterioration of a recording material at the starting and ending ends of the recording area of the optical disk and an optical disk capable of preventing the movement of the substance of a recording film. CONSTITUTION:When data are recorded on an optical disk comprising a recording area 116 for recording data and a servo area 115 on which information for tracking control required for recording or reproducing the data is recorded, the servo area 115 is irradiated with an erasing power 132 larger than a reproducing power 133 and information for tracking control is reproduced.

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