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31. 发明公开

EP0664651A3 Video communication system, with variable and fixed bit-rate storage equipment 失效
标题翻译：视频通信系统，包括具有可变和固定比特率的记录装置。
公开(公告)号：EP0664651A3
公开(公告)日：1996-03-13
申请号：EP95100573.5
申请日：1995-01-17
申请人： HITACHI, LTD.
发明人： Kinoshita, Taizo , Saito, Atsushi , Mimura, Itaru
IPC分类号： H04N7/26 , H04N7/173 , H04N5/926 , H04N7/32
CPC分类号： H04N5/9261 , H04N5/85 , H04N19/124 , H04N19/139 , H04N19/14 , H04N19/146 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/172 , H04N19/176 , H04N19/61
摘要： In a video transmission system, raw video data input from an input device (ID) are transformed into coded data through a variable bit-rate coder (11T), and are written into storage equipment (3T) such as an optical disk device via a butter (21T). During the transmission, the coded data are read out from the storage equipment (3T) and are transmitted, via a buffer (22T) to a transmission line (N) at a low speed, at a high speed or at a varying speed different from the real-time transmission speed. In a video receiver, the coded data are received from the transmission line (N) via a buffer (22R) and are written into storage equipment (3R). To reproduce the data, a variable bit-rate decoder (41R) reads the coded data from storage equipment (3R) via a buffer (21R), decodes the initial video data, and displays them on a display device (OD).

32. 发明公开

EP0620695A2 Information transmission system with variable transmission rate 失效
标题翻译：信息管理者Vermittlungsgeschwindigkeit。
公开(公告)号：EP0620695A2
公开(公告)日：1994-10-19
申请号：EP94105488.4
申请日：1994-04-08
申请人： HITACHI, LTD.
发明人： Saito, Atsushi , Takasaki, Yoshitaka , Kinoshita, Taizo , Kitajima, Shigeki
IPC分类号： H04Q11/04 , H04L12/56
CPC分类号： H04L47/25 , H04L12/54 , H04L47/10 , H04L49/90 , H04L49/9047 , H04M11/08 , H04N7/56 , H04N19/115 , H04N19/146 , H04N19/152 , H04N19/164 , H04N19/184 , H04N19/50 , H04N19/61 , H04N21/21 , H04N21/23 , H04N21/6377 , H04N21/658 , H04Q11/04
摘要： A method and system for information processing in a bidirectional information transmission system, particularly for transmitting information in accordance with a change in a transmission capacity of a transmission line. A system is provided which can change an information transmission rate in accordance with a room capacity of a transmission line. This information transmission system includes a plurality of information providers (101 - 103), a plurality of information receivers (111 - 113), an information storage and distribution unit (121) connected to the information providers and receivers, and a plurality of information transmission lines (141 - 146, 131 - 136) for information transmission between the information providers and receivers and the information storage and distribution unit, wherein the information transmission rate of each information transmission line is changed.
摘要翻译：一种用于双向信息传输系统中的信息处理的方法和系统，特别是用于根据传输线的传输容量的变化发送信息。提供一种可以根据传输线的容量来改变信息传输速率的系统。该信息传输系统包括多个信息提供者（101-103），多个信息接收器（111-113），连接到信息提供者和接收者的信息存储和分发单元（121），以及多个信息传输用于信息提供者和接收者之间的信息传输的线路（141至146,131至136）以及信息存储和分配单元，其中每个信息传输线路的信息传输速率改变。

33. 发明公开

EP0587019A2 Optical disk system and information processing system using the same 失效
标题翻译： Optisches Plattensystem sowie Informationsverarbeitungssystem dazu。
公开(公告)号：EP0587019A2
公开(公告)日：1994-03-16
申请号：EP93113890.3
申请日：1993-08-31
申请人： HITACHI, LTD.
发明人： Minemura, Hiroyuki , Sato, Yoshio , Fushimi, Tetsuya , Tsuboi, Nobuyoshi , Yasukawa, Saburo , Sugita, Tatsuya , Saito, Atsushi , Matsumoto, Kiyoshi , Tsunoda, Yoshito
IPC分类号： G11B7/013 , G11B7/00 , G11B20/12 , G11B19/28
CPC分类号： G11B20/1258 , G11B7/0938 , G11B27/3027 , G11B27/329 , G11B2020/1282 , G11B2220/20
摘要： An optical disk system and an information processing system using the same. By constituting zones (51, 52) for MCLV (Modulated Constant Linear Velocity) drive in conformance with designated partition capacity in an optical disk medium (10) while overwriting therein sector addresses (31), a high-speed access comparable to a CAV (Constant Angular Velocity) system as well as a large capacity comparable to CLV (Constant Linear Velocity) system can be realized.
摘要翻译：光盘系统和使用该光盘系统的信息处理系统。通过根据光盘介质（10）中的指定分区容量构建用于MCLV（调制恒定线速度）驱动的区域（51,52），同时在其中覆盖扇区地址（31），与CAV（恒定角速度）系统以及与CLV（恒定线速度）系统相当的大容量。

34. 发明公开

EP0477892A2 Method of and apparatus for correcting edge interval of pit in optical recording/read-out apparatus 失效
标题翻译：为/校正孔之间的距离在光学记录重放装置的方法和设备。
公开(公告)号：EP0477892A2
公开(公告)日：1992-04-01
申请号：EP91116322.8
申请日：1991-09-25
申请人： HITACHI, LTD.
发明人： Ide, Hiroshi , Maeda, Takeshi , Saito, Atsushi
IPC分类号： G11B7/00 , G11B7/125 , G11B7/013
CPC分类号： G11B7/126 , G11B7/0045 , G11B7/24085 , G11B11/10506 , G11B11/1053 , G11B11/10595 , G11B20/10009 , G11B20/10212 , G11B20/1258 , G11B20/1816 , G11B27/36
摘要： In a method for correcting effects of thermal interference from a previously recorded pattern, there is formed a table representing relationships between kinds of record patterns and edge shift quantities of the read-out patterns. Edge shift quantities of particular patterns with respect to a unitary variation quantity of a recording medium surface temperature and with respect to a unitary variation quantity of a laser power are beforehand acquired as correction control data (83, 89). Before actual data recording the patterns are again recorded and reat out. If then an edge shift occurs, a variation quantity of the recording medium surface temperature and of the laser power are separately attained based on a quantity of the edge shift occurred and the correction control data collected in advance (91). Using each variation quantity (92), the value set to the laser power is altered (93) and/or the data in the table are updated to correct the actual data (94).
摘要翻译：在用于从先前记录的图案修正热干扰的影响的方法中，形成代表种读出的图案的记录模式和边缘移位量之间的关系的表。特定图案的边缘移位量相对于在记录介质的表面温度的，并相对于一个单一的变化量到的激光功率的整体变化量被预先取得的作为校正的控制数据（83，89）。前实际数据记录模式被再次记录和不动产资产信托了。如果然后以边沿位移的发生时，记录介质的表面温度的，并基于发生移位的边缘和预先（91）收集到的校正控制的数据量被分别获得的激光功率的变化量。使用每个变化量（92），设置激光功率的值被改变（93）和/或在表中的数据被更新，以修正实际数据（94）。

35. 发明授权

EP0166460B1 Optical head for magneto-optical memory 失效
标题翻译：光学记忆光学头
公开(公告)号：EP0166460B1
公开(公告)日：1991-04-03
申请号：EP85108077.0
申请日：1985-06-28
申请人： HITACHI, LTD.
发明人： Ojima, Masahiro , Saito, Atsushi , Kato, Tsuyoshi
IPC分类号： G11B11/10
CPC分类号： G11B11/10532

36. 发明公开

EP0322817A3 Recording method for magnetoptical disk and apparatus therefor 失效
标题翻译：磁盘及其装置的记录方法
公开(公告)号：EP0322817A3
公开(公告)日：1991-03-13
申请号：EP88121631.1
申请日：1988-12-23
申请人： HITACHI, LTD. , Hitachi Maxell Ltd.
发明人： Nagai, Nobuyuki , Maeda, Takeshi , Saito, Atsushi , Nakao, Takeshi , Watanabe, Hitoshi Hitachi Maxell Shihoryo
IPC分类号： G11B20/10 , G11B27/10 , G11B11/10 , G11B20/18 , G11B27/30
CPC分类号： G11B20/10212 , G11B11/10508 , G11B11/1053 , G11B11/10595 , G11B19/02 , G11B27/30 , G11B27/36
摘要： A method of recording a signal in a magnetooptical disk (1) having pre-pits (110, 111, 112) formed on a recording track (120) which pits are optically detectable for generation of data read and write clocks. The method includes the steps of: prior to writing data in the magnetooptical disk, writing a test pattern (301) on a top portion of a data recording area of the magnetooptical disk at predetermined timings (27); reading the data recording area to generate a time shift (305) between the read-out test pattern (304) and the original test pattern (301); adjusting the predetermined timings (27) in accordance with the time shift (305) to generate adjusted data write timings (29); and writing data in the data writing area in accordance with the adjusted data write timings (29). A recording apparatus for a magnetooptical disk (1) using the recording method, includes: a timing shift detection unit (42) for receiving a predetermined test pattern signal (301) and a read-out signal (304) of the test pattern written in the magnetooptical disk at predetermined clocks (27), and detecting a time shift (305) therebetween; a clock adjustment unit (28) for adjusting the predetermined clocks (27) in accordance with the detected time shift (305) detected by the timing shift detection unit to generate adjusted clocks (29); a clock switching unit (30) for receiving the predetermined clocks (27) and the adjusted clocks (29), and selectively outputting ones of the predetermined clocks and the adjusted clocks upon reception of a predetermined switching signal (30A); a data modulation unit (41) for receiving one of the predetermined test pattern (301) and write data (32), modulating the received one at the timings of ones of the received clocks inputted from the clock switching unit (30), and outputting the received modulated one to a write device (10); and a control unit (43) adapted to operate such that in writing the test pattern (301) in the magnetooptical disk (1), the test pattern signal (301) is outputted to the data modulation unit (41), and the switching signal (30A) is outputted to the clock switching unit (30) to supply the predetermined clocks (27) to the data modulation unit (41), in reading the test pattern, the test pattern (304) is outputted to the timing shift detection unit (42), and in writing data, the switching signal (30A) is outputted to the clock switching unit (30) to output the adjusted clocks (29) to the data modulation unit (41) to which the write data (32) are also outputted.

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