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    Method of embedding sound field control factor and method of processing sound field
    63.
    发明申请
    Method of embedding sound field control factor and method of processing sound field 审中-公开
    声场控制因素嵌入方法及声场处理方法

    公开(公告)号：US20060059001A1

    公开(公告)日：2006-03-16

    申请号：US11100446

    申请日：2005-04-07

    申请人： Byeong-seob Ko

    发明人： Byeong-seob Ko

    IPC分类号： G10L17/00

    CPC分类号： G11B20/00992 ,  G11B20/00891 ,  G11B20/00913 ,  G11B20/10527 ,  G11B27/002 ,  G11B27/10 ,  G11B2020/10546 ,  H04H20/31 ,  H04H20/89 ,  H04H2201/50

    摘要： A method of embedding sound field control factors (SFC factors) into a sound source. The method includes coding sound field factors and sound field information to obtain sound field control factors for the sound source in a binary data type, and the sound field factors represent an acoustic characteristic of the sound source and the sound field information represents an environment under which the sound source is decoded, and watermarking the sound field control factors into the sound source without compressing the sound source. In this method, the SFC factors that represent characteristics of the sound source are embedded into the sound source itself using a digital watermarking technology. Therefore, the SFC factors need not be manually set by a user. In addition, the SFC factors can be reliably transmitted, irrespective of header corruption caused by format conversion and transmission of a compressed sound source.

    摘要翻译： 将声场控制因子（SFC因子）嵌入声源的方法。 该方法包括编码声场因子和声场信息，以获得二进制数据类型中的声源的声场控制因子，声场因子表示声源的声学特性，声场信息表示一种环境， 声源被解码，并将声场控制因子水印到声源中而不压缩声源。 在这种方法中，使用数字水印技术将表示声源特征的SFC因子嵌入声源本身。 因此，SFC因素不需要由用户手动设置。 此外，不管由格式转换和压缩声源的传输引起的标题损坏，SFC因素都可以被可靠地传输。

    Audio watermarking with dual watermarks
    65.
    发明授权
    Audio watermarking with dual watermarks 失效

    公开(公告)号：US06952774B1

    公开(公告)日：2005-10-04

    申请号：US09316899

    申请日：1999-05-22

    申请人： Darko Kirovski ,  Henrique Malvar ,  Mariusz H. Jakubowski

    发明人： Darko Kirovski ,  Henrique Malvar ,  Mariusz H. Jakubowski

    IPC分类号： G11B20/00 ,  H04H20/31 ,  H04N5/913 ,  H04L9/00 ,  G06K9/00

    CPC分类号： H04H20/31 ,  G11B20/00086 ,  G11B20/00891 ,  G11B2020/1062 ,  H04N2005/91335

    摘要： A watermark encoding system encodes an audio signal with both a strong and a weak watermark. The strong watermark identifies the content producer and is designed to survive all typical kinds of processing and malicious attacks. The weak watermark identifies the content as an original and is designed to be significantly removed as a result of most normal signal processing (other than A/D and D/A). The watermark encoding system has a converter to convert an audio signal into frequency and phase components and a mask processor to determine a hearing threshold for corresponding frequency components. The watermark encoding system also has a pattern generator to generate both the strong and weak watermarks and a watermark insertion unit to selectively insert either the strong or weak watermark into the audio signal. The watermark insertion unit adds the strong watermark to the audio signal when the signal exceeds the hearing threshold by a buffer value (e.g., 1-8 dB) and adds the weak watermark insertion unit when the signal falls below the hearing threshold by the buffer value. When the signal falls within the buffer area about the hearing threshold, the insertion unit takes no action. A watermark detecting system is equipped with a watermark detector that determines which block interval of the watermarked audio signal contains a watermark pattern and if the strong or weak watermark is present in that block interval of the signal.

    Embedding auxiliary data in an information signal
    66.
    发明申请
    Embedding auxiliary data in an information signal 失效
    在辅助信息中嵌入辅助数据

    公开(公告)号：US20050175110A1

    公开(公告)日：2005-08-11

    申请号：US10477491

    申请日：2002-05-15

    申请人： Marten Van Dijk ,  Franciscus Maria Willems

    发明人： Marten Van Dijk ,  Franciscus Maria Willems

    IPC分类号： H03M13/19 ,  G11B20/00 ,  G11B20/18 ,  H04L1/00 ,  G06F19/00 ,  G01N33/48 ,  G01N33/50 ,  H04B14/04

    CPC分类号： G11B20/00891 ,  G11B20/00 ,  G11B20/00086 ,  G11B20/18

    摘要： Information signals such as grayscale images or audio signals are represented as a sequence of PCM signal samples. To embed auxiliary data in the least significant bits of the signal, the samples are slightly distorted. There is a so-termed “rate-distortion function” (20) which gives the largest embedding rate R given a certain distortion level D. It appears that the efficiency of prior art embedding schemes such as LSB replacement (21,22) can be improved. The invention discloses such embedding schemes (23,24). According to the invention, the signal is divided into groups of L (L>1) signal samples (x). For each group of signal samples, a vector of least significant portions (x mod n) of the signal samples is created. For n=2, the vector comprises the least significant bit of each signal sample. The syndrome of said vector (as defined in the field of error detection and correction) represents the embedded data. Only one (or a few, in any case less than L) signal sample(s) of a group needs to be modified so as to achieve that the vector assumes a desired syndrome value.

    摘要翻译： 诸如灰度图像或音频信号的信息信号被表示为PCM信号样本的序列。 为了将辅助数据嵌入到信号的最低有效位中，样本稍微失真。 存在所谓的“速率失真函数”（20），给出给定一定的失真水平D的最大嵌入速率R.看起来，诸如LSB替换（21,22）的现有技术嵌入方案的效率可以是 改进。 本发明公开了这种嵌入方案（23,24）。 根据本发明，信号被分成L（L> 1）个信号样本（x）的组。 对于每组信号样本，产生信号样本的最低有效部分（xmod n）的向量。 对于n = 2，矢量包括每个信号样本的最低有效位。 所述向量（如在错误检测和校正领域中定义的）的综合表示嵌入数据。 需要修改组中只有一个（或少数在任何情况下小于L个）信号样本），以便实现矢量呈现期望的综合征值。

    Time domain watermarking of multimedia signals
    68.
    发明申请
    Time domain watermarking of multimedia signals 失效
    时域水印多媒体信号

    公开(公告)号：US20050152549A1

    公开(公告)日：2005-07-14

    申请号：US10509548

    申请日：2003-02-26

    申请人： Aweke Lemma ,  Javier Aprea

    发明人： Aweke Lemma ,  Javier Aprea

    IPC分类号： G10L19/018 ,  G10L19/02 ,  G11B20/00 ,  H04K1/00

    CPC分类号： G11B20/00891 ,  G10L19/018 ,  G10L19/02 ,  G11B20/00086

    摘要： A method of generating a watermark signal, embedding the watermark signal within a multimedia signal, and subsequently detecting the watermark signal is described. The watermark signal is the sum of two sequences of values, the second sequence of values being a circularly shifted version of the first sequence.

    摘要翻译： 描述了一种产生水印信号，在水印信号内嵌入水印信号，随后检测水印信号的方法。 水印信号是两个值序列的和，第二个序列是第一个序列的循环版本。