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21. 发明申请

US20050154959A1 Method and apparatus for embedding an additional layer of error correction into an error correcting code 失效
标题翻译：用于将错误校正的附加层嵌入纠错码的方法和装置
公开(公告)号：US20050154959A1
公开(公告)日：2005-07-14
申请号：US10509478
申请日：2003-03-14
申请人： Marten Van Dijk , Kouhei Yamamoto
发明人： Marten Van Dijk , Kouhei Yamamoto
IPC分类号： G06F11/10 , G11B20/10 , G11B20/12 , G11B20/18 , H03M13/11 , H03M13/15 , H03M13/29 , H03M13/00
CPC分类号： H03M13/2945 , G11B20/1833 , H03M13/1515 , H03M13/2909 , H03M13/2942 , H03M13/2954
摘要： The present invention relates to a method of embedding an additional layer of error correction into an error correcting code such as a product code in a DVD or a picket code in a DVR, wherein information is encoded into code words of said code and wherein a number of code words are arranged in the columns of code block. In order to provide an additional layer of error correction that can be easily implemented without losing compatibility improving the error correction capabilities a method is proposed comprising the steps of: reducing the length of each row of said code block by adding row symbols together according to a predetermined adding rule resulting in a reduced code block, encoding the shortened rows of said reduced code block using a horizontal error correcting code to obtain horizontal parities, embedding said horizontal parities as additional layer in said error correcting code.
摘要翻译：本发明涉及将错误校正的附加层嵌入诸如DVD中的产品代码或DVR中的纠杂码的纠错码的方法，其中信息被编码为所述码的码字，并且其中号码的代码字排列在代码块的列中。为了提供可以容易地实现的附加的错误校正层，而不失去改进纠错能力的兼容性，提出了一种方法，包括以下步骤：通过根据导致减少代码块的预定添加规则，使用水平纠错码对所述缩小代码块的缩短行编码以获得水平奇偶校验，将所述水平奇偶校验作为附加层嵌入所述纠错码中。

22. 发明申请

US20050044395A1 Secure data input dialogue using visual cryptography 审中-公开
标题翻译：使用视觉加密技术安全的数据输入对话框
公开(公告)号：US20050044395A1
公开(公告)日：2005-02-24
申请号：US10501421
申请日：2002-12-13
申请人： Antonius Staring , Marten Van Dijk , Pim Tuyls
发明人： Antonius Staring , Marten Van Dijk , Pim Tuyls
IPC分类号： G06F3/14 , G06F1/00 , G06F3/048 , G09C5/00 , H04K1/00 , H04N1/44 , H04L9/00 , H04L9/32
CPC分类号： G09C5/00
摘要： A method of secure transmission and reception of a message from a user. An image (320) representing a plurality of input means, e.g. an image of a keypad, is generated and encoded. The image is encoded using visual cryptography using a key sequence stored in a decryption device (310) as randomization. The randomized image is transmitted to the client device (301), where it is displayed on a first display (501) The randomization is displayed on a second display (311) Superimposing the first and second displays reveals the image. The client device (301) allows the user to select particular spots on the first display (501) that correspond to the location of particular input means on the reconstructed image. The coordinates of these spots are transmitted back to the server (300), which can translate them to the particular input means selected by the user. The message is then constructed as the input symbol represented by the particular input means.
摘要翻译：一种从用户发送和接收消息的方法。表示多个输入装置的图像（320），例如。生成并编码小键盘的图像。使用存储在解密装置（310）中的密钥序列作为随机化，使用可视加密来编码图像。随机化图像被发送到客户端设备（301），其中显示在第一显示器（501）上。随机化显示在第二显示器（311）上。叠加第一和第二显示器显示图像。客户端设备（301）允许用户在重建图像上选择第一显示器（501）上与特定输入装置的位置相对应的特定点。这些点的坐标被发送回服务器（300），这可以将它们转换成由用户选择的特定输入装置。然后将消息构造为由特定输入装置表示的输入符号。

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