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    Optical information recording and reproducing system and optical disk
    3.
    发明授权
    Optical information recording and reproducing system and optical disk 失效
    光信息记录和复制系统和光盘

    公开(公告)号：US5077720A

    公开(公告)日：1991-12-31

    申请号：US507800

    申请日：1990-04-12

    申请人： Yuji Takagi ,  Isao Satoh ,  Makoto Ichinose ,  Yoshihisa Fukushima ,  Yuzuru Kuroki ,  Yasushi Azumatani

    发明人： Yuji Takagi ,  Isao Satoh ,  Makoto Ichinose ,  Yoshihisa Fukushima ,  Yuzuru Kuroki ,  Yasushi Azumatani

    IPC分类号： G11B20/18

    CPC分类号： G11B20/1883 ,  G11B20/1833 ,  G11B2220/20

    摘要： A read only optical disk is provided which includes (1) information sectors having recorded therein first encoded data obtained by encoding data by a first error detection/correction code to perform error detection and correction of the data and (2) check sectors each having recorded therein second encoded data obtained by encoding data among the first encoded data recorded in a plurality of selected information sectors by a second error detection/correction code. The second encoding by the second error detection/correction code is performed with respect to the data of the plurality of selected information sectors which are selected from respective tracks and are arranged sequentially at predetermined intervals in the circumferential direction on the tracks. As a result, in this read only optical disk, even when a two-dimensional defect (i.e., one extending circumferentially and radially) is present on the disk, there is no case in which two or more information sectors associated with the check sector cannot be subjected to error correction. Also, as a result of having one track including (2.sup.m -1) information sectors and one check sector which has overall parities of the information sectors recorded therein, it becomes possible to record in the check sector and in each of the information sectors, respectively, an address, which is peculiar to each sector, to thereby, realize the reproduction of data with high reliability.

    Optical information recording and reproducing system using optical disks having an error correction function
    4.
    发明授权
    Optical information recording and reproducing system using optical disks having an error correction function 失效
    使用具有纠错功能的光盘的光信息记录和再现系统

    公开(公告)号：US4949326A

    公开(公告)日：1990-08-14

    申请号：US129141

    申请日：1987-12-07

    申请人： Yuji Takagi ,  Isao Satoh ,  Makoto Ichinose ,  Yoshihisa Fukushima ,  Yuzuru Kuroki ,  Yasushi Azumatani

    发明人： Yuji Takagi ,  Isao Satoh ,  Makoto Ichinose ,  Yoshihisa Fukushima ,  Yuzuru Kuroki ,  Yasushi Azumatani

    IPC分类号： G11B20/18

    CPC分类号： G11B20/1883 ,  G11B20/1833 ,  G11B2220/20

    摘要： In a read only type optical disk and a write type optical disk each thereof having a data recording area and a spare area, first encoded data for error detection and correction are recorded in the data recording area. In the case of the read only type optical disk, the spare area is used as a check sector in which second encoded data are recorded. When error correction by first error control means becomes impossible while sectors in the data recording area are reproduced, second error control means performs error correction by using the check sector corresponding to an associated error sector. In the case of the write type optical disk, the spare area is used as an alternate sector. A defective sector detected by defective sector detecting means is alternately recorded by being replaced by the alternate sector through sector alternating means.

    摘要翻译： 在只读型光盘和具有数据记录区和备用区的写型光盘中，用于错误检测和校正的第一编码数据被记录在数据记录区中。 在只读型光盘的情况下，备用区域被用作记录第二编码数据的检查扇区。 当在数据记录区域中的扇区被再现时，通过第一误差控制装置的纠错变得不可能，第二误差控制装置通过使用对应于相关联的误差扇区的检查扇区来执行纠错。 在写入型光盘的情况下，备用区域用作替代扇区。 由缺陷扇区检测装置检测到的缺陷扇区通过由扇区交替装置的替换扇区代替地交替记录。

    Information retrieval apparatus for searching target literature data from an information recording medium, including reuse of past retrieving results
    8.
    发明授权
    Information retrieval apparatus for searching target literature data from an information recording medium, including reuse of past retrieving results 失效
    信息检索装置，用于从信息记录介质搜索目标文献数据，包括重用过去的检索结果

    公开(公告)号：US5457794A

    公开(公告)日：1995-10-10

    申请号：US49734

    申请日：1993-04-19

    申请人： Yasushi Azumatani ,  Isao Satoh ,  Yoshihisa Fukushima ,  Yuji Takagi ,  Hiroshi Hamasaka ,  Yuji Hisakado

    发明人： Yasushi Azumatani ,  Isao Satoh ,  Yoshihisa Fukushima ,  Yuji Takagi ,  Hiroshi Hamasaka ,  Yuji Hisakado

    IPC分类号： G06F17/30

    CPC分类号： G06F17/30985 ,  G06F17/30457 ,  Y10S707/99932 ,  Y10S707/99933

    摘要： The present invention relates to an information retrieval apparatus for retrieving large quantities of the document files stored in the information recording medium by the successive matched comparison between the character string of a target and the character string in the coded document. When the retrieving result of the document file retrieved in the past is stored within the information recording medium together with the retrieving conditions and the document file is retrieved again with the same retrieving conditions, the information retrieval apparatus of the present invention makes it unnecessary to retrieve the document file itself by the reuse of the past retrieving results if the latest retrieved date and time are newer than the recording date and time of the document file so as to shorten the retrieving time.

    摘要翻译： 信息检索装置技术领域本发明涉及一种信息检索装置，用于通过目标字符串与编码文档中的字符串之间的连续匹配比较来检索存储在信息记录介质中的大量文档文件。 当将过去检索到的文档文件的检索结果与检索条件一起存储在信息记录介质中并且以相同的检索条件再次检索文档文件时，本发明的信息检索装置使得不必检索 如果最新检索的日期和时间比文档文件的记录日期和时间更新，则通过重新使用过去的检索结果来缩短文档文件本身，以缩短检索时间。

    Information device for providing fast data transfer with minimum overhead
    10.
    发明授权
    Information device for providing fast data transfer with minimum overhead 失效
    信息设备，以最小的开销提供快速的数据传输

    公开(公告)号：US5566350A

    公开(公告)日：1996-10-15

    申请号：US400284

    申请日：1995-03-03

    申请人： Yuji Takagi ,  Isao Satoh ,  Yoshihisa Fukushima ,  Yasushi Azumatani ,  Hiroshi Hamasaka

    发明人： Yuji Takagi ,  Isao Satoh ,  Yoshihisa Fukushima ,  Yasushi Azumatani ,  Hiroshi Hamasaka

    IPC分类号： G06F13/38 ,  G06F13/42

    CPC分类号： G06F13/4239

    摘要： An information device which ensures fast data transfer between a RAM and an I/O channel, between an I/O channel and another I/O channel, or between a RAM and another RAM: comprises address decoder circuit which allows the CPU to gain simultaneous access to both the RAM and the I/O channel when the CPU accesses a data transfer area mapped for data transfer, and an inverter which assures that both the RAM and the I/O channel operate in a mutually opposite manner, either in one mode in which the RAM works in a read operation with the I/O channel in a write operation or vice versa in response to the access request of read/write from the CPU. By assuring that both the RAM and the I/O channel operate in a mutually opposite manner, in response to an access from the CPU, data transfer between the RAM and the I/O channel is completed in a single access from the CPU; thus, fast data transfer is achieved.

    摘要翻译： 确保RAM和I / O通道之间，I / O通道和另一个I / O通道之间或RAM与另一RAM之间的快速数据传输的信息设备包括地址解码器电路，其允许CPU同时获得 当CPU访问映射用于数据传输的数据传输区域时，访问RAM和I / O通道;以及逆变器，其确保RAM和I / O通道都以相互相反的方式工作，或者以一种模式 其中RAM响应于来自CPU的读/写访问请求，在写操作中以I / O通道进行读操作，反之亦然。 通过确保RAM和I / O通道都以相互相反的方式操作，响应于来自CPU的访问，RAM和I / O通道之间的数据传输在来自CPU的单个访问中完成; 从而实现快速的数据传输。