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    Spread spectrum modulation system and method for embedding digital information into digital or analog media
    21.
    发明申请
    Spread spectrum modulation system and method for embedding digital information into digital or analog media 有权
    扩频调制系统和数字信息嵌入数字或模拟媒体的方法

    公开(公告)号：US20040240524A1

    公开(公告)日：2004-12-02

    申请号：US10865690

    申请日：2004-06-10

    Applicant: Microsoft Corporation

    Inventor： Henrique S. Malvar ,  Dinei A. Florencio

    IPC: H04B001/69

    CPC classification number: G06T1/005 ,  G06T2201/0063 ,  G06T2201/0065 ,  G06T2201/0083 ,  G11B20/00086 ,  G11B20/00913 ,  H04B1/69

    Abstract: A system and method for embedding information into digital media and later detecting the embedded information using a unique spread spectrum modulation technique. In general, the present invention removes interference caused by an original signal from the detection process thereby eliminating a major source of detection error. The interference caused by the original signal is removed by using the encoder knowledge about the original signal and modulating the energy of the embedded mark to compensate for the original signal interference. The present invention also includes a novel redundant bit representation technique causes a resulting average over a large sample to tend to zero, thereby reducing the vulnerability of the present invention to malicious collusion attacks.

    Abstract translation: 一种用于将信息嵌入数字媒体并随后使用独特的扩频调制技术检测嵌入信息的系统和方法。 通常，本发明从检测处理中去除由原始信号引起的干扰，从而消除了主要的检测误差。 通过使用关于原始信号的编码器知识和调制嵌入标记的能量来补偿原始信号干扰来消除由原始信号引起的干扰。 本发明还包括一种新颖的冗余比特表示技术使得大样本上的平均结果趋于零，从而将本发明的脆弱性降低到恶意串通攻击。

    Data processing apparatus and method
    22.
    发明申请
    Data processing apparatus and method 失效
    数据处理装置及方法

    公开(公告)号：US20040064716A1

    公开(公告)日：2004-04-01

    申请号：US10611735

    申请日：2003-07-01

    Inventor： Daniel Warren Tapson

    IPC: G06F012/14

    CPC classification number: H04N1/32154 ,  G06T1/005 ,  G06T2201/0052 ,  G06T2201/0063 ,  G06T2201/0065 ,  G06T2201/0081 ,  H04N1/32165 ,  H04N1/3217 ,  H04N1/32277 ,  H04N2201/3235 ,  H04N2201/327

    Abstract: A detecting data processing apparatus determines whether one or more code words of a predetermined set of code words are present in a suspected version of a material item. The apparatus comprises a registration processor operable to associate samples of the suspected version with samples of a copy of the original material item, a recovery processor and a detection processor. The recovery processor is operable to generate a recovered code word by comparing the registered copy of the original and the suspect material items. The detection processor is operable to detect one or more code words from a correlation between the recovered code word and the code words from the set. The registration processor is operable to form at least one reduced-bandwidth-version of the material item and to associate the suspected version and the copy of the material item in accordance with a comparison between the reduced-bandwidth-versions of the suspected version and the original material item. The registration of the suspected version and the original version of the material item is typically required in order to improve a likelihood of correctly recovering a code word from the suspected version. For material items such as video recordings of motion picture films, a substantial number of samples may need to be associated in order to effect the registration process. As a result, the registration process may be time consuming or at least computationally difficult. However, by forming reduced-bandwidth-versions of the suspected version and the original version of the material items, a corresponding reduction in the time taken to perform the registration process is provide in accordance with the bandwidth reduction.

    Abstract translation: 检测数据处理装置确定在材料项目的可疑版本中是否存在预定的一组代码字的一个或多个代码字。 所述装置包括可操作以将可疑版本的样本与原材料项目的副本，恢复处理器和检测处理器的样本相关联的注册处理器。 恢复处理器可操作以通过比较原始文件和可疑材料项目的登记副本来生成恢复的代码字。 检测处理器可操作以从恢复的码字和来自该组的码字之间的相关性来检测一个或多个码字。 注册处理器可操作以形成材料项目的至少一个减少带宽版本，并且根据可疑版本的减少带宽版本与可疑版本的缩减带宽版本之间的比较来关联可疑版本和材料项目的副本 原料项目。 通常需要注册怀疑版本和原始版本的材料项目，以便提高从可疑版本正确恢复代码字的可能性。 对于诸如电影胶片的视频记录的材料项目，可能需要关联大量样本以实现注册过程。 结果，注册过程可能是耗时的或至少在计算上是困难的。 然而，通过形成可疑版本的减少带宽版本和原始版本的材料项目，根据带宽减少提供执行注册过程所花费的时间的相应减少。

    Watermarking a digital signal using signal meta data
    23.
    发明申请
    Watermarking a digital signal using signal meta data 审中-公开
    使用信号元数据对数字信号进行水印

    公开(公告)号：US20030051143A1

    公开(公告)日：2003-03-13

    申请号：US09948679

    申请日：2001-09-10

    Inventor： Ravi Razdan ,  Jonathan Peter Hughes

    IPC: H04L009/00

    CPC classification number: G06T1/005 ,  G06T2201/0052 ,  G06T2201/0063 ,  H04N1/32187 ,  H04N1/3232 ,  H04N2201/3233 ,  H04N2201/327

    Abstract: A method is described for finding areas of a signal which survive multiple transcodings and signal conversions. Then using these identified areas and associated meta data to insert in real-time hard to detect traceable watermarks in a secure and robust manner. Also a means of extracting the marks from pilfered or suspect digital signal using such information.

    Abstract translation: 描述了一种用于寻找能够经受多次转码和信号转换的信号区域的方法。 然后使用这些识别的区域和相关联的元数据来实时地插入以便以安全和鲁棒的方式检测可追溯水印。 也是使用这种信息从被窃或疑似的数字信号中提取标记的一种手段。

    Secure spread spectrum watermarking for multimedia data
    25.
    发明授权
    Secure spread spectrum watermarking for multimedia data 有权
    用于多媒体数据的安全扩频水印

    公开(公告)号：US06208735B1

    公开(公告)日：2001-03-27

    申请号：US09239240

    申请日：1999-01-28

    Applicant: Ingemar J. Cox ,  Joseph J. Kilian ,  Talal G. Shamoon

    Inventor： Ingemar J. Cox ,  Joseph J. Kilian ,  Talal G. Shamoon

    IPC: G09C500

    CPC classification number: H04H20/31 ,  G06T1/0028 ,  G06T1/005 ,  G06T2201/0052 ,  G06T2201/0063 ,  G06T2201/0081 ,  G11B20/00891 ,  H04N19/467 ,  H04N21/23892 ,  H04N21/8358

    Abstract: Digital watermarking of audio, image, video or multimedia data is achieved by inserting the watermark into the perceptually significant components of a decomposition of the data in a manner so as to be visually imperceptible. In a preferred method, a frequency spectral image of the data, preferably a Fourier transform of the data, is obtained. A watermark is inserted into perceptually significant components of the frequency spectral image. The resultant watermarked spectral image is subjected to an inverse transform to produce watermarked data. The watermark is extracted from watermarked data by first comparing the watermarked data with the original data to obtain an extracted watermark. Then, the original watermark, original data and the extracted watermark are compared to generate a watermark which is analyzed for authenticity of the watermark.

    Abstract translation: 音频，图像，视频或多媒体数据的数字水印通过将视频不可察觉的方式将水印插入数据分解的感知重要组件来实现。 在优选的方法中，获得数据的频谱图像，优选数据的傅里叶变换。 将水印插入到频谱图像的感知重要组件中。 对所得水印的光谱图像进行逆变换以产生水印数据。 通过首先将水印数据与原始数据进行比较，从水印数据中提取水印，以获得提取的水印。 然后，将原始水印，原始数据和提取的水印进行比较，生成水印的真实性。

    Methods and arrangements involving substrate marking
    30.
    发明授权
    Methods and arrangements involving substrate marking 有权

    公开(公告)号：US09898793B2

    公开(公告)日：2018-02-20

    申请号：US14446068

    申请日：2014-07-29

    Applicant: Digimarc Corporation

    Inventor： Tony F. Rodriguez

    IPC: G06T1/00 ,  G06Q10/08 ,  G07D7/2033 ,  G07D7/005

    CPC classification number: G06T1/0071 ,  G06Q10/08 ,  G06T1/005 ,  G06T2201/0063 ,  G07D7/005 ,  G07D7/2033

    Abstract: First and second patterns are formed on a substrate. A spatial offset between the patterns is determined, and stored for later use in authenticating the substrate. (One or both of the patterns may convey steganographic information. One pattern may be printed, while the other may be embossed.) A smartphone can sense these patterns, determine the spatial offset, and check whether the determined offset matches the earlier-stored offset, to judge whether the substrate is authentic. Another arrangement effects serialization of product packaging by use of paired patterns (at least one of which is typically a watermark pattern) applied in a manner causing a spatial offset between the patterns to progressively vary along a length of a printed web. Still other arrangements involve substrates conveying patterns that degrade over time, e.g., indicating freshness or pressurization condition. A great variety of other features and arrangements are also detailed.

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