公开(公告)号：US20050135654A1

公开(公告)日：2005-06-23

申请号：US10880513

申请日：2004-07-01

申请人： Jian-Ru Li ,  Guo-Zua Wu ,  Meng-Han Tsai ,  Kun-Ta Wu

发明人： Jian-Ru Li ,  Guo-Zua Wu ,  Meng-Han Tsai ,  Kun-Ta Wu

IPC分类号： G06K9/00 ,  G06T1/00 ,  H04N7/16

CPC分类号： G06T1/005 ,  G06T2201/0052 ,  G06T2201/0083

摘要： A watermark coding method and its recording medium utilize image interleaving and wavelet-based transformation to enhance the robustness of the image. The watermark series to be inserted is converted, encrypted, and modulated to increase the difficulty in decoding and restoring. Finally, the watermark is distributed and hidden in various frequency bands of the image in a frequency hopping way, generating a robust watermarked image. When used in a recording medium, side information produced during coding is recorded in the lead-in area of the recording medium to reduce the chances of illegal copying.

摘要翻译： 水印编码方法及其记录介质利用图像交织和基于小波的变换来增强图像的鲁棒性。 要插入的水印系列被转换，加密和调制，以增加解码和恢复的难度。 最后，水印以跳频方式分布和隐藏在图像的各个频带中，生成鲁棒的水印图像。 当在记录介质中使用时，编码期间产生的副信息被记录在记录介质的导入区中，以减少非法复制的机会。

公开(公告)号：US06483799B1

公开(公告)日：2002-11-19

申请号：US09490024

申请日：2000-01-21

申请人： Zu-Wen Chao ,  Guo-Zua Wu ,  Der-Ray Huang ,  Wei-Cheng Chen

发明人： Zu-Wen Chao ,  Guo-Zua Wu ,  Der-Ray Huang ,  Wei-Cheng Chen

IPC分类号： G11B2300

CPC分类号： G11B31/006

摘要： A rewritable DVD-RAM disc. By changing the location or dimension of the lead-out area of the DVD-RAM disc, the data area of the disc can be enlarged. The enlarged area of the disc can be flexibly applied to the user area, the main spare area, or the backup spare area.

摘要翻译： 可重写DVD-RAM光盘。 通过改变DVD-RAM光盘的导出区域的位置或尺寸，可以扩大光盘的数据区域。 盘的放大区域可以灵活地应用于用户区域，主备用区域或备用备用区域。

公开(公告)号：US06415400B1

公开(公告)日：2002-07-02

申请号：US09434863

申请日：1999-11-04

申请人： Guo-Zua Wu ,  Zu-Wen Chao ,  Wei-Cheng Chen

发明人： Guo-Zua Wu ,  Zu-Wen Chao ,  Wei-Cheng Chen

IPC分类号： G11C2900

CPC分类号： G11B20/1883 ,  G11B20/18 ,  G11B2220/20

摘要： A method is proposed for managing defect areas on an erasable optical disc in a dynamic manner. By this method, a main spare area including a plurality of logical blocks is used to provide substitution logic blocks for any bad logical blocks in the user read/write area; and when all the logical blocks in the main spare area are used up, a supplementary spare area is defined from a continuous unused storage area in the user read/write area; and further, when all the logical blocks in this supplementary spare area are used up, an additional supplementary spare area is defined from another continuous unused storage area in the user read/write area; and so forth. The method allows the use of a comprehensive set of commands and data message for the communication between the file system and the optical drive when performing this management method. This method allows the optical drive to move over a shorter distance from a bad logical block to the substitution logic block so that access time to the optical disc can be enhanced. Moreover, this method allows all the bad logical blocks to have substitutions as long as the unused storage space in the formatted area is sufficient, so that this method can offer a much longer time of service than the prior art.

摘要翻译： 提出了以动态方式管理可擦除光盘上的缺陷区域的方法。 通过该方法，使用包括多个逻辑块的主备用区域来为用户读/写区域中的任何不良逻辑块提供替换逻辑块; 并且当主备用区中的所有逻辑块用完时，从用户读/写区中的连续未使用的存储区定义辅助备用区; 此外，当该辅助备用区域中的所有逻辑块用完时，从用户读/写区域中的另一连续未使用的存储区域定义附加补充备用区域; 等等。 该方法允许在执行该管理方法时使用一组全面的命令和数据消息来进行文件系统与光驱之间的通信。 该方法允许光驱从不良逻辑块到替代逻辑块的较短距离移动，从而可以提高对光盘的访问时间。 此外，只要格式化区域中的未使用的存储空间足够，该方法允许所有不良逻辑块具有替换，使得该方法可以提供比现有技术更长的服务时间。