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    • 1. 发明授权
    • Method and system for managing access to data through data transformation
    • 通过数据转换管理数据访问的方法和系统
    • US06351439B1
    • 2002-02-26
    • US09269917
    • 1999-04-01
    • Kunihiko MiwaHiroya KobayashiNorishige Morimoto
    • Kunihiko MiwaHiroya KobayashiNorishige Morimoto
    • G11B700
    • G06T1/0035G06T2201/0051G06T2201/0061G06T2201/0064G11B20/00086G11B20/00094G11B20/00768G11B20/00884H04N5/913H04N9/8042H04N2005/91314H04N2005/91321H04N2005/91328H04N2005/91335
    • In providing a system that can manage access to data to effectively prevent illegal access to the data or the like, there is provided a system for embedding access management information that prepares management information for managing access to the data, and embeds the management information in the data through data transformation without changing amount of data. In managing access to data, there is provided a method that extracts management information embedded in the data through data deformation without changing amount of data, and manages access to the data according to the extracted management information. There is also provided a method for changing management of access to the data according to the type of medium in which the data is stored (RAM or ROM). The management information further contains information for controlling recording of the data, reception of the data, playback of the data, interference of output of the data, duplication history of the data, or modification of the management information. The access management method can prevent illegal duplication of data or the like, and can effectively protect a work.
    • 在提供能够管理对数据的访问以有效防止非法访问数据等的系统时,提供了一种嵌入访问管理信息的系统,其准备用于管理数据访问的管理信息,并将管理信息嵌入到 数据通过数据转换而不改变数据量。 在管理对数据的访问时,提供了一种通过数据变形提取嵌入在数据中的管理信息而不改变数据量的方法,并且根据提取的管理信息管理对数据的访问。 还提供了根据存储数据的介质的类型(RAM或ROM)来改变对数据的访问管理的方法。 管理信息还包括用于控制数据的记录,数据的接收,数据的回放,数据输出的干扰,数据的复制历史或管理信息的修改的信息。 访问管理方法可以防止数据的非法复制等,并能有效保护工作。
    • 2. 发明授权
    • Method of recording media data on a storage medium and method and system
for accessing the media data recorded on the storage medium
    • 在存储介质上记录媒体数据的方法以及用于访问记录在存储介质上的媒体数据的方法和系统
    • US06034931A
    • 2000-03-07
    • US928853
    • 1997-09-11
    • Kunihiko MiwaHiroya KobayashiNorishige Morimoto
    • Kunihiko MiwaHiroya KobayashiNorishige Morimoto
    • G06T1/00G11B20/00H04N5/913H04N9/804G11B7/00
    • G06T1/0035G11B20/00086G11B20/00094G11B20/00768G11B20/00884H04N5/913H04N9/8042G06T2201/0051G06T2201/0061G06T2201/0064H04N2005/91314H04N2005/91321H04N2005/91328H04N2005/91335
    • Management information is embedded by directly controlling media with a date hiding technique. A system which accesses (regenerates or records) media data by using the management information is controlled based on this management information, and according to the contents of the management information, the access to media data is inhibited. Therefore, illegal duplication of data can be prevented, and consequently, works can be effectively protected. More particularly, in a system for accessing media data stored on a storage medium 51, the system comprises means 52 for reading out data from the storage medium, means 56 for specifying an embedding region, in which management information for managing access to the media data was embedded, from the read-out data and for extracting the management information in accordance with a status of the embedding region by referring to an extraction rule where the status of the embedding region is caused to correspond to the contents of data to be extracted, means 60 for generating an access interference signal, and means 59 for selectively outputting either the read-out signal or a signal generated by both the read-out signal and the access interference signal, in accordance with the contents of the management information.
    • 通过使用日期隐藏技术直接控制媒体来嵌入管理信息。 基于该管理信息控制通过使用管理信息访问(再生或记录)媒体数据的系统,并且根据管理信息的内容,禁止对媒体数据的访问。 因此,可以防止非法复制数据,从而可以有效地保护作品。 更具体地,在用于访问存储在存储介质51上的媒体数据的系统中,系统包括用于从存储介质读出数据的装置52,用于指定嵌入区域的装置56,其中用于管理对媒体数据的访问的管理信息 从读出的数据中嵌入,根据嵌入区域的状态通过参照嵌入区域的状态对应于要提取的数据的内容的提取规则来提取管理信息, 用于产生存取干扰信号的装置60以及用于根据管理信息的内容选择性地输出读出信号或由读出信号和存取干扰信号产生的信号的装置59。
    • 3. 发明授权
    • Data control system
    • 数据控制系统
    • US06230268B1
    • 2001-05-08
    • US09127061
    • 1998-07-31
    • Kunihiko MiwaNorishige MorimotoShuichi Shimizu
    • Kunihiko MiwaNorishige MorimotoShuichi Shimizu
    • G06F1130
    • G11B20/00898G06T1/0021G06T2201/0064G11B20/00086H04N7/24
    • An object of the Invention is to provide a system and method for effecting a secure data control using an electronic watermarking with a low manufacturing cost. A solution of the objective is a data control system is built which comprises; embedding a control flag indicating to control data using an electronic watermarking technique, preparing a token having information as to how to control the data by using the content of the data, distributing the token appended to the data, detecting the control flag from the distributed data, reading the token appended to the data when the control flag is detected, and controlling the data according to a predefined control rule of the token or the control flag. In addition, a subsequent data control is further suppressed by modifying the token in controlling the data.
    • 本发明的一个目的是提供一种利用低制造成本的电子水印实现安全数据控制的系统和方法。 目标的解决方案是构建数据控制系统; 使用电子水印技术嵌入指示控制数据的控制标志,通过使用数据内容来准备具有关于如何控制数据的信息的令牌,分配附加到数据上的令牌,从分布式数据检测控制标志 当检测到控制标志时读取附加到数据的令牌,并且根据令牌或控制标志的预定义的控制规则来控制数据。 此外,通过在控制数据中修改令牌来进一步抑制后续的数据控制。
    • 8. 发明授权
    • Data hiding and extraction methods
    • 数据隐藏和提取方法
    • US06512835B1
    • 2003-01-28
    • US09480024
    • 2000-01-10
    • Masayuki NumaoShuichi ShimizuNorishige MorimotoMei Kobayashi
    • Masayuki NumaoShuichi ShimizuNorishige MorimotoMei Kobayashi
    • G06K900
    • H04N1/32203G06T1/0021G06T2201/0051G06T2201/0061G09C5/00H04N1/32208H04N1/32251H04N1/32309H04N21/23892H04N21/8358H04N2201/3233H04N2201/327
    • The present invention provides a data hiding method of hiding media data in message data and a data extraction method of extracting the hidden data wherein message data is dispersively hidden in media data such as an image or sound to prevent a third person from modifying the message data easily. More specifically, the present invention relates to a data hiding method in which media data is expressed as a media array while message data is expressed as a message array so that the array elements of the message array can be dispersively hidden in the message array based on a state values specifying a particular array element of the media array, comprising the steps of: (a) determining the j-th (j≧0) state value Sj; (b) determining (j+1)-th state value Sj+1 based on the j-th state value, the array element of the media array indicated by the j-th state value, and the array element of the message array; and (c) hiding data with respect to the array element of the media array indicated by the (j+1)-th state value Sj+1.
    • 本发明提供一种在消息数据中隐藏媒体数据的数据隐藏方法和提取隐藏数据的数据提取方法,其中消息数据被分散地隐藏在诸如图像或声音的媒体数据中,以防止第三人修改消息数据 更具体地,本发明涉及一种数据隐藏方法,其中媒体数据被表示为媒体阵列,而消息数据被表示为消息数组,使得消息数组的数组元素可以被分散地隐藏在消息数组中 基于指定媒体阵列的特定数组元素的状态值,包括以下步骤:(a)确定第j(j> = 0)状态值Sj;(b)确定第(j + 1)状态 基于第j个状态值的值Sj + 1,由第j个状态值指示的媒体数组的数组元素和消息数组的数组元素; 和(c)隐藏相对于由第(j + 1)状态值Sj + 1指示的媒体阵列的数组元素的数据。