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1. 发明申请

WO0233650A8 HUMAN VISUAL MODEL FOR DATA HIDING 审中-公开
标题翻译：人类视觉模型用于数据隐藏
公开(公告)号：WO0233650A8
公开(公告)日：2002-09-12
申请号：PCT/US0132247
申请日：2001-10-17
申请人： MATSUSHITA ELECTRIC IND CO LTD , WU MIN , YU HONG HEATHER
发明人： WU MIN , YU HONG HEATHER
IPC分类号： G06T1/00 , H04N1/387 , G06K9/00 , G06K9/36
CPC分类号： G06T1/0092 , G06T1/0028 , G06T2201/0051 , G06T2201/0052 , G06T2201/0061 , G06T2201/0202
摘要： A method and apparatus of hiding identification data (12) in visual media. When image or video data is received, frequency masking (14) is performed to divide the image or video data into blocks of smooth regions and blocks of non-smooth regions and to obtain preliminary just-noticeable-difference. Edge detection is performed to divide the non-smooth region of the image or video data into texture blocks and edge blocks (16). The image or video data is then adjusted by applying different strength of watermark in association with the type of each block.
摘要翻译：一种在视觉媒体中隐藏识别数据（12）的方法和装置。当接收到图像或视频数据时，执行频率屏蔽（14）以将图像或视频数据划分为平滑区域和非平滑区域块，并获得初步的明显差异。执行边缘检测以将图像或视频数据的非平滑区域划分为纹理块和边缘块（16）。然后通过与每个块的类型相关联地应用不同强度的水印来调整图像或视频数据。

2. 发明申请

WO2004109662A2 METHODS AND APPARATUS FOR DIGITAL CONTENT PROTECTION 审中-公开
标题翻译：数字内容保护的方法和装置
公开(公告)号：WO2004109662A2
公开(公告)日：2004-12-16
申请号：PCT/US2004010741
申请日：2004-04-08
申请人： MATSUSHITA ELECTRIC IND CO LTD , YU HONG HEATHER , BHATTACHARYA PRABIR
发明人： YU HONG HEATHER , BHATTACHARYA PRABIR
IPC分类号： H04N5/913 , H04N7/24 , G11B
CPC分类号： H04N21/8358 , H04N5/913 , H04N21/23892 , H04N2005/91335 , H04N2005/91392
摘要： A multilayer digital content protection system, particularly for a digital cinema application is provided. Detection of unauthorized activity at the time it is occurring is provided using a first protection layer. Two layers of imperceptible watermarks, one camcorder viewable and one camcorder invisible are inserted into unauthorized copies of the digital content with second and third protection layers. Strong near infrared is also used to degrade the quality of any attempted unauthorized recording of digital content using a camcorder.
摘要翻译：提供了一种多层数字内容保护系统，特别是用于数字电影应用的数字内容保护系统。使用第一保护层提供在发生时的未授权活动的检测。两层不可察觉的水印，一台可观看摄像机和一台摄像机不可见，插入到具有第二和第三保护层的数字内容的未经授权的副本中。强近红外线也用于降低使用摄像机尝试未经授权录制数字内容的质量。

3. 发明申请

WO2006007345A3 SCALABLE STREAMING MEDIA AUTHENTICATION 审中-公开
标题翻译：可扩展流媒体认证
公开(公告)号：WO2006007345A3
公开(公告)日：2007-03-29
申请号：PCT/US2005020312
申请日：2005-06-09
申请人： MATSUSHITA ELECTRIC IND CO LTD , YU HONG HEATHER
发明人： YU HONG HEATHER
IPC分类号： H04B1/66 , H04L9/00 , H04L9/32 , H04N7/16 , H04N7/167
CPC分类号： H04N7/1675 , H04L9/3236 , H04L9/3247 , H04L2209/60 , H04L2209/80 , H04N7/165 , H04N21/2343 , H04N21/2541 , H04N21/2662 , H04N21/631 , H04N21/835
摘要： Consumer networks, increasingly used for multimedia information and commercial content delivery, are destined to be heterogeneous. To provide QoS, it is necessary to adapt the multimedia stream to the heterogeneous network channel conditions and device capabilities. Meanwhile, security is an important component to restrict unauthorized multimedia content access and distribution. This suggests the need for new cryptography system implementations that can operate at different data rates, i.e., be scaled to various multimedia content, different network topology, changing bandwidth, and diverse receiver device capabilities. Content authentication is one important security tool for secure multimedia content communication. Conventional message authentication schemes do not offer suitable scalability for this new set of applications. The present invention addresses design of scalable media data stream authentication and presents a framework for multimedia authentication that supports various kinds of scalability.
摘要翻译：消费者网络越来越多地用于多媒体信息和商业内容传递，注定是异构的。为了提供QoS，有必要使多媒体流适应异构网络信道条件和设备能力。同时，安全是限制未经授权的多媒体内容访问和分发的重要组成部分。这表明需要可以以不同的数据速率操作的新的密码系统实现，即，被缩放到各种多媒体内容，不同的网络拓扑，改变带宽以及各种接收机设备能力。内容认证是安全多媒体内容通信的重要安全工具之一。传统的消息认证方案不能为这一新的应用程序提供适当的可扩展性。本发明解决了可扩展媒体数据流认证的设计，并提出了支持各种可扩展性的多媒体认证框架。

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