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    • 2. 发明授权
    • Method apparatus for determining prefetch operating for a data base
    • 用于确定数据库的预取操作的方法装置
    • US5317727A
    • 1994-05-31
    • US353698
    • 1989-05-17
    • Masashi TsuchidaKazuhiko OhmachiToshio HonmaYasuhiro ImaiNobuo Kawamura
    • Masashi TsuchidaKazuhiko OhmachiToshio HonmaYasuhiro ImaiNobuo Kawamura
    • G06F12/00G06F17/30G06F15/403
    • G06F17/3048Y10S707/99932
    • In a data base processing method including a central processing unit for analyzing a plurality of queries made from a plurality of users so as to determine an internal processing procedure with respect to a data base, and for performing the internal processing procedure; a secondary storage for storing data capable of being shared by each user; and, an input/output controlling processing unit including at least one cache storage, for controlling a transfer of a plurality of records which are required for input/output processing operations between the central processing unit and secondary storage. The data base processing method is featured in that a decision is made whether or not a prefetching operation is carried out at a start of an input/output processing operation by judging the internal processing procedure which has been formed by the query; a retrieval range into which a record to be fetched has been stored is formed when the prefetching operation is performed; and, a prefetching record number is determined as an input/output processing demand unit, taking account of an access characteristic of the internal processing procedure and also a system characteristic containing a size of the cache storage, a performance, of the central processing unit, and a traffic of the input/output processing unit.
    • 一种数据库处理方法,包括:中央处理单元,用于分析从多个用户进行的多个查询,以便确定相对于数据库的内部处理过程,并用于执行内部处理过程; 用于存储能够被每个用户共享的数据的辅助存储器; 以及输入/输出控制处理单元,其包括至少一个高速缓存存储器,用于控制中央处理单元和辅助存储器之间的输入/输出处理操作所需的多个记录的传送。 数据库处理方法的特征在于,通过判断由查询形成的内部处理过程,判定在输入/输出处理操作开始时是否执行预取操作; 当执行预取操作时,形成已经存储了要获取的记录的检索范围; 并且,考虑到内部处理过程的访问特性以及包含高速缓冲存储器的大小,中央处理单元的性能的系统特性,将预取记录号确定为输入/输出处理需求单元, 以及输入/输出处理单元的流量。
    • 8. 发明授权
    • Image reading apparatus with A/D conversion and adjustment thereof
    • 具有A / D转换和调整的图像读取装置
    • US5748335A
    • 1998-05-05
    • US464079
    • 1995-06-05
    • Toshio HonmaNobuo MatsuokaShizuo HasegawaYasumichi SuzukiHiroshi ItagakiKenji Sasahara
    • Toshio HonmaNobuo MatsuokaShizuo HasegawaYasumichi SuzukiHiroshi ItagakiKenji Sasahara
    • H04N1/401H04N1/407H04N1/00
    • H04N1/4076H04N1/401
    • An image reading apparatus such as a color copying apparatus has a plurality of sensing CCD chips for converting an image of an object into an electrical signal, each sensing CCD chip having a plurality of sensing elements. The apparatus also has a circuit for converting the electrical signal into digital data. A first adjusting circuit is provided for conducting either an operation for obtaining level matching of the electrical signal converted by the sensing chips, or an operation for controlling the gain of the electrical signal converted by the sensing chips. The apparatus further has a second adjusting circuit for effecting compensation for fluctuation of characteristics of the sensing elements of the sensing chips, by making use of the digital data converted by the converting circuit, the second adjusting circuit being adapted for effecting the compensation on the basis of electrical signals which are produced as a result of conversion by the sensing chips from two objects having different levels of density from each other, such as white and black levels. An analog-to-digital converter may also be provided to convert analog data into digital data. In that case, first adjusting means will adjust the analog data discretely, through a step smaller than the quantizing step used in the A/D conversion, and a second adjusting means may preferably further adjust the analog data in accordance with digital data obtained through the A/D conversion.
    • 诸如彩色复印装置的图像读取装置具有用于将物体的图像转换为电信号的多个感测CCD芯片,每个感测CCD芯片具有多个感测元件。 该装置还具有用于将电信号转换成数字数据的电路。 提供第一调整电路用于进行用于获得由感测芯片转换的电信号的电平匹配的操作或用于控制由感测芯片转换的电信号的增益的操作。 该装置还具有第二调整电路,用于通过利用由转换电路转换的数字数据来实现对感测芯片的感测元件的特性的波动的补偿,第二调整电路适于在此基础上进行补偿 作为由感测芯片从具有彼此不同密度水平的两个物体(例如白色和黑色水平)转换而产生的电信号。 还可以提供模拟数字转换器以将模拟数据转换为数字数据。 在这种情况下,第一调整装置将通过小于A / D转换中使用的量化步骤的步长离散地调节模拟数据,并且第二调整装置可以优选地根据通过 A / D转换。
    • 9. 发明授权
    • Image reading apparatus with A/D conversion and adjustment thereof
    • 具有A / D转换和调整的图像读取装置
    • US5596427A
    • 1997-01-21
    • US274351
    • 1994-07-13
    • Toshio HonmaNobuo MatsuokaShizuo HasegawaYasumichi SuzukiHiroshi ItagakiKenji Sasahara
    • Toshio HonmaNobuo MatsuokaShizuo HasegawaYasumichi SuzukiHiroshi ItagakiKenji Sasahara
    • H04N1/401H04N1/407H04N1/03
    • H04N1/4076H04N1/401
    • An image reading apparatus such as a color copying apparatus has a plurality of sensing CCD chips for converting an image of an object into an electrical signal, each sensing CCD chip having a plurality of sensing elements. The apparatus also has a circuit for converting the electrical signal into digital data. A first adjusting circuit is provided for conducting either an operation for obtaining level matching of the electrical signal converted by the sensing chips, or an operation for controlling the gain of the electrical signal converted by the sensing chips. The apparatus further has a second adjusting circuit for effecting compensation for fluctuation of characteristics of the sensing elements of the sensing chips, by making use of the digital data converted by the converting circuit, the second adjusting circuit being adapted for effecting the compensation on the basis of electrical signals which are produced as a result of conversion by the sensing chips from two objects having different levels of density from each other, such as white and black levels. An analog-to digital converter may also be provided to convert analog data into digital data may also be provided. In that case, first adjusting means will adjust the analog data discretely, through a step smaller than the quantizing step used in the A/D conversion, and a second adjusting means may preferably further adjust the analog data in accordance with digital data obtained through the A/D conversion.
    • 诸如彩色复印装置的图像读取装置具有用于将物体的图像转换为电信号的多个感测CCD芯片,每个感测CCD芯片具有多个感测元件。 该装置还具有用于将电信号转换成数字数据的电路。 提供第一调整电路用于进行用于获得由感测芯片转换的电信号的电平匹配的操作或用于控制由感测芯片转换的电信号的增益的操作。 该装置还具有第二调整电路,用于通过利用由转换电路转换的数字数据来实现对感测芯片的感测元件的特性的波动的补偿,第二调整电路适于在此基础上进行补偿 作为由感测芯片从具有彼此不同密度水平的两个物体(例如白色和黑色水平)转换而产生的电信号。 还可以提供模拟数字转换器以将模拟数据转换成数字数据。 在这种情况下,第一调整装置将通过小于A / D转换中使用的量化步骤的步长离散地调节模拟数据,并且第二调整装置可以优选地根据通过 A / D转换。