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1. 发明授权

US08281137B2 Method and apparatus for determining whether or not a reference pattern is present in a received and possibly watermarked signal 有权
标题翻译：用于确定参考图案是否存在于接收和可能加水印的信号中的方法和装置
公开(公告)号：US08281137B2
公开(公告)日：2012-10-02
申请号：US12321071
申请日：2009-01-15
申请人： Peter Georg Baum , Michael Arnold , Ulrich Gries , Walter Voessing
发明人： Peter Georg Baum , Michael Arnold , Ulrich Gries , Walter Voessing
IPC分类号： H04L9/32
CPC分类号： G10L19/018 , G06T1/0078 , G06T2201/0065 , H04N1/32154
摘要： Many watermarking systems make use of correlation for calculating a detection metric, which means that several reference patterns are generated at encoder side and one or more of them are embedded inside the content signal, dependent on the message to be embedded. To decode the embedded message, it is necessary to discover which reference pattern was embedded at encoder side by correlating the known reference patterns with the content signal. In the case where watermarked audio is emitted by a loudspeaker and then captured with a microphone, the received signal echoes are used for watermark detection instead of treating them as noise by integrating the correlation values resulting from echoes into the main correlation peak, thereby using correlation result amplitude values located within a predetermined neighborhood of a correlation result peak amplitude value and exceeding a predetermined threshold.
摘要翻译：许多水印系统利用相关性来计算检测度量，这意味着在编码器侧产生几个参考图案，并且其中一个或多个嵌入在内容信号内，这取决于待嵌入的消息。为了对嵌入的消息进行解码，需要通过将已知的参考模式与内容信号相关联来发现在编码器侧嵌入哪个参考模式。在由扬声器发出水印音频然后用麦克风捕获的情况下，接收到的信号回波用于水印检测，而不是通过将由回波产生的相关值积分到主相关峰中而将其作为噪声来处理，从而使用相关结果振幅值位于相关结果峰值振幅值的预定邻域内并超过预定阈值。

2. 发明申请

US20130132729A1 METHOD AND SYSTEM FOR PROTECTING BY WATERMARKING AGAINST NON-AUTHORISED USE ORIGINAL AUDIO OR VIDEO DATA WHICH ARE TO BE PRESENTED 审中-公开
标题翻译：防止非授权使用原始音频或视频数据进行水印保护的方法和系统
公开(公告)号：US20130132729A1
公开(公告)日：2013-05-23
申请号：US13813641
申请日：2011-07-26
申请人： Michael Arnold , Peter Georg Baum , Ulrich Gries , Walter Voessing
发明人： Michael Arnold , Peter Georg Baum , Ulrich Gries , Walter Voessing
IPC分类号： H04L9/28
CPC分类号： H04L9/28 , G06T1/0071 , G09C5/00 , H04L9/12 , H04L9/3297 , H04L2209/608
摘要： For protecting by watermarking against non-authorised use, e.g. non-authorised recording or copying, original audio or video data which are to be presented in a digital cinema, a sender site generates from the original signal at least two differently pre-watermarked versions for successive blocks or frames of the signal, wherein these versions are derived by applying a repeated watermark symbol value to a version and different watermark symbol values to the different versions. The pre-watermarked signal versions are encrypted and transferred e.g. as data files to a digital cinema unit in which they are decrypted. According to the values of a desired watermark information word, corresponding frames or blocks from said decrypted and pre-watermarked versions are assembled in a successive manner, so as to provide and present a watermarked version of said original audio or video signal that carries said watermark information word.
摘要翻译：为了通过防止非授权使用的水印来保护。非授权的记录或复制，要呈现在数字电影院中的原始音频或视频数据，发送者站点从原始信号生成用于连续块或帧信号的至少两种不同的预水印版本，其中这些版本通过将重复的水印符号值应用于不同版本的版本和不同的水印符号值来导出。预加水印的信号版本被加密和传送。作为将数据文件解密的数字电影单元。根据期望的水印信息字的值，以连续的方式组合来自所述解密和预水印版本的相应帧或块，以便提供并呈现携带所述水印的所述原始音频或视频信号的水印版本信息字。

3. 发明申请

US20130070960A1 PROVIDING A WATERMARKED DECODED AUDIO OR VIDEO SIGNAL DERIVED FROM A WATERMARKED AUDIO OR VIDEO SIGNAL THAT WAS LOW BIT RATE ENCODED AND DECODED 审中-公开
标题翻译：提供WATERMARKED解码的音频或视频信号从水印音视频或视频信号传输，低码率编码和解码
公开(公告)号：US20130070960A1
公开(公告)日：2013-03-21
申请号：US13701115
申请日：2011-05-18
申请人： Ulrich Gries , Peter Georg Baum , Michael Arnold , Walter Voessing
发明人： Ulrich Gries , Peter Georg Baum , Michael Arnold , Walter Voessing
IPC分类号： G06K9/00
CPC分类号： G06T1/005 , G10L19/018 , H04L2209/608
摘要： Various audio signal watermarking systems are known, which are also applied to digitally encoded audio signals. However, in current audio signal watermarking systems the watermark signal and its watermark payload do not survive very low bit rate audio coding, in particular parametric coding. According to the invention, a watermarked uncompressed audio signal bit-stream is low-bit rate compressed, but the water-marking is removed and the watermark's payload only is transmitted together with the compressed audio signal bit-stream. At decoder side, the received audio signal bit stream is de-compressed and water-marked again using the transmitted watermark payload. Advantageously, it does not matter that the compressed bitstream is not watermarked because the compressed bitstream can be encrypted prior to transmission.
摘要翻译：各种音频信号水印系统是已知的，其也被应用于数字编码的音频信号。然而，在当前音频信号水印系统中，水印信号及其水印有效载荷不能承受非常低的比特率音频编码，特别是参数编码。根据本发明，水印非压缩音频信号比特流是低比特率压缩的，但是水印被去除，并且水印的有效载荷仅与压缩的音频信号比特流一起发送。在解码器侧，使用发送的水印有效载荷对接收到的音频信号比特流进行解压缩并进行水标记。有利的是，由于压缩比特流可以在传输之前加密，因此压缩比特流不加水印并不重要。

4. 发明申请

US20090187765A1 Method and apparatus for determining whether or not a reference pattern is present in a received and possibly watermarked signal 有权
标题翻译：用于确定参考图案是否存在于接收和可能加水印的信号中的方法和装置
公开(公告)号：US20090187765A1
公开(公告)日：2009-07-23
申请号：US12321071
申请日：2009-01-15
申请人： Peter Georg Baum , Michael Arnold , Ulrich Gries , Walter Voessing
发明人： Peter Georg Baum , Michael Arnold , Ulrich Gries , Walter Voessing
IPC分类号： H04L9/00
CPC分类号： G10L19/018 , G06T1/0078 , G06T2201/0065 , H04N1/32154
摘要： Many watermarking systems make use of correlation for calculating a detection metric, which means that several reference patterns are generated at encoder side and one or more of them are embedded inside the content signal, dependent on the message to be embedded. To decode the embedded message, it is necessary to discover which reference pattern was embedded at encoder side. This is determined by correlating the known reference patterns with the content signal. A watermark detector decides, depending on the size of the correlation result values, whether or not a given pseudo-random sequence was embedded. However, this does not provide correct decisions if watermarked audio is emitted by a loudspeaker and then captured with a microphone. According to the invention, it is taken advantage of the received signal echoes instead of treating them as noise. The watermark detection result is improved by integrating the correlation values resulting from echoes into the main correlation peak, thereby using correlation result amplitude values located within a predetermined neighborhood of a correlation result peak amplitude value and exceeding a predetermined threshold.
摘要翻译：许多水印系统利用相关性来计算检测度量，这意味着在编码器侧产生几个参考图案，并且其中一个或多个嵌入在内容信号内，这取决于待嵌入的消息。要解码嵌入的消息，有必要发现在编码器侧嵌入了哪个参考模式。这通过将已知的参考图案与内容信号相关联来确定。水印检测器根据相关结果值的大小来决定是否嵌入给定的伪随机序列。然而，如果由扬声器发出水印音频，然后用麦克风捕获，则这不能提供正确的决定。根据本发明，利用接收的信号回波而不是将它们视为噪声。通过将由回波产生的相关值积分到主相关峰中来提高水印检测结果，从而使用位于相关结果峰值振幅值的预定邻域内并超过预定阈值的相关结果幅度值。

5. 发明授权

US08688993B2 Method and apparatus for determining and using the sampling frequency for decoding watermark information embedded in a received signal sampled with an original sampling frequency at encoder side 有权
标题翻译：用于确定和使用采样频率来解码嵌入在编码器侧以原始采样频率采样的接收信号中的水印信息的方法和装置
公开(公告)号：US08688993B2
公开(公告)日：2014-04-01
申请号：US12319302
申请日：2009-01-06
申请人： Peter Georg Baum , Walter Voessing , Ulrich Gries
发明人： Peter Georg Baum , Walter Voessing , Ulrich Gries
IPC分类号： H04L29/06 , H04L9/32 , H04N7/167 , H03M1/06
CPC分类号： H04L9/32 , G06T1/005 , G06T2201/0052 , G06T2201/0065 , G10L19/018 , G11B20/00884 , H03M1/0617 , H04L9/3247 , H04N7/167 , H04N21/4394 , H04N21/8358
摘要： In watermarked signal decoding, the embedded message is decoded by correlating the reference patterns with the watermarked signal. The watermark detector decides, depending on the size of the correlation result values, whether or not a given reference pattern was embedded. However, decoding watermarked audio or video signals is difficult if the link between the watermark encoder and the watermark decoder is not a digital one, for example an acoustic path. A re-sampler control unit controls the sampling frequency of a re-sampler, in connection with a watermark decoder that outputs, in addition to the watermark information bits, a corresponding confidence value that is derived from the correlation result and that is used for synchronizing the re-sampler sampling frequency with the original sampling frequency of the watermarked signal. The synchronization processing includes a search mode and a synchronized mode.
摘要翻译：在水印信号解码中，通过将参考图案与水印信号相关来对嵌入的消息进行解码。水印检测器根据相关结果值的大小决定是否嵌入给定的参考图案。然而，如果水印编码器和水印解码器之间的链接不是数字水印解码器，例如声学路径，则解码加密的音频或视频信号是困难的。重新取样器控制单元控制重新取样器的采样频率，与水印解码器相关联，水印解码器除了水印信息位之外还输出相应的置信度值，该置信度值从相关结果导出并用于同步重采样器采样频率与原始采样频率的水印信号。同步处理包括搜索模式和同步模式。

6. 发明申请

US20090193255A1 Method and apparatus for determining and using the sampling frequency for decoding watermark information embedded in a received signal sampled with an original sampling frequency at encoder side 有权
标题翻译：用于确定和使用采样频率来解码嵌入在编码器侧以原始采样频率采样的接收信号中的水印信息的方法和装置
公开(公告)号：US20090193255A1
公开(公告)日：2009-07-30
申请号：US12319302
申请日：2009-01-06
申请人： Peter Georg Baum , Walter Voessing , Ulrich Gries
发明人： Peter Georg Baum , Walter Voessing , Ulrich Gries
IPC分类号： H04L9/32 , G06N5/02
CPC分类号： H04L9/32 , G06T1/005 , G06T2201/0052 , G06T2201/0065 , G10L19/018 , G11B20/00884 , H03M1/0617 , H04L9/3247 , H04N7/167 , H04N21/4394 , H04N21/8358
摘要： Many watermarking systems make use of correlation for calculating a detection metric, which means that reference patterns are generated at encoder side and are embedded inside the audio or video signal, dependent on the message to be embedded. The same reference patterns are generated at decoder side. The embedded message is decoded by correlating the reference patterns with the watermarked signal. The watermark detector decides, depending on the size of the correlation result values, whether or not a given reference pattern was embedded. However, decoding watermarked audio or video signals is difficult if the link between the watermark encoder and the watermark decoder is not a digital one, for example an acoustic path. According to the invention, a re-sampler control unit controls the sampling frequency of a re-sampler, in connection with a watermark decoder that outputs, in addition to the watermark information bits, a corresponding confidence value that is derived from the correlation result and that is used for synchronizing the re-sampler sampling frequency with the original sampling frequency of the watermarked signal. The synchronization processing includes a search mode and a synchronized mode.
摘要翻译：许多水印系统利用相关性来计算检测度量，这意味着参考图案在编码器侧生成，并且嵌入在音频或视频信号内，取决于要嵌入的消息。在解码器侧产生相同的参考模式。通过将参考图案与水印信号相关联来解码嵌入的消息。水印检测器根据相关结果值的大小决定是否嵌入给定的参考图案。然而，如果水印编码器和水印解码器之间的链接不是数字水印解码器，例如声学路径，则解码加密的音频或视频信号是困难的。根据本发明，重新取样器控制单元结合除了水印信息比特以外的相关置信度值从水平信息比特输出的水印解码器，控制重采样器的采样频率，用于使重采样器采样频率与水印信号的原始采样频率同步。同步处理包括搜索模式和同步模式。

7. 发明授权

US08041073B2 Decoding watermark information items of a watermarked audio or video signal using correlation 有权
标题翻译：使用相关性解码加水印的音频或视频信号的水印信息项
公开(公告)号：US08041073B2
公开(公告)日：2011-10-18
申请号：US12086575
申请日：2006-12-01
申请人： Peter Georg Baum , Walter Voessing
发明人： Peter Georg Baum , Walter Voessing
IPC分类号： G06K9/00 , H04L9/32
CPC分类号： G06T1/0071 , G06T1/005 , G06T2201/0052 , G06T2201/0065
摘要： Watermark information consists of several data symbols which are embedded continuously in an audio or a video signal using modulation with a pseudo-random sequence if spread spectrum technology is used. At decoder site the watermark information is regained using correlation of the received signal with a candidate pseudo-random sequence. Such correlation can be performed by one-dimensional real-symmetric fast Fourier transform of the two input signal vectors, which each consist of a section of N values of the input signal, to which section N−1 zeroes are attached, by multiplying one of the transformed vectors by the conjugated version of the other transformed vector, followed by inverse RFFT transform of that frequency domain product vector. However, if the level of a spread-spectrum watermark is too low or if too much noise had been added during the transmission of the audio or video signals, the correlation does not show a clear peak, which means that the watermark information bits cannot be recovered. According to the invention, the correlation result is improved by setting to zero in the frequency domain frequency bins of the vector which do not have a positive impact on the correlation peak at location zero, i.e. which frequency bins do not contribute to that peak. Thereby the noise level in the correlation or matched filter output is reduced and the watermark information items can be recovered or decoded correctly from the received watermarked audio or video signal.
摘要翻译：如果使用扩展频谱技术，水印信息由若干数据符号组成，这些数据符号连续地嵌入音频或视频信号中，使用具有伪随机序列的调制。在解码器站点，使用接收信号与候选伪随机序列的相关来重新获得水印信息。这样的相关可以通过两个输入信号向量的一维实对称快速傅里叶变换来执行，每个输入信号矢量各自由输入信号的N个值的一部分组成，其中N-1个零被附加到，通过将通过其他转化载体的共轭形式的变换向量，随后对该频域乘积向量进行逆RFFT变换。然而，如果扩频水印的水平太低或在传输音频或视频信号时噪声过大，则相关性不会显示清晰的峰值，这意味着水印信息位不能恢复。根据本发明，通过在对位置零上的相关峰值没有积极影响的矢量的频域频率仓中设定为零，即哪个频率频带对该峰值没有贡献，相关结果得到改善。从而降低了相关或匹配滤波器输出中的噪声电平，并且可以从接收到的带有水印的音频或视频信号中正确地恢复或解码水印信息项。

8. 发明授权

US08081757B2 Blind watermarking of audio signals by using phase modifications 有权
标题翻译：通过相位修改对音频信号进行盲加水印
公开(公告)号：US08081757B2
公开(公告)日：2011-12-20
申请号：US11992039
申请日：2006-09-04
申请人： Walter Voessing , Peter Georg Baum
发明人： Walter Voessing , Peter Georg Baum
IPC分类号： H04L9/00 , H04B1/69
CPC分类号： G10L19/018
摘要： Watermarking of audio signals intends to manipulate the audio signal in a way that the changes in the audio content cannot be recognised by the human auditory system. In order to reduce the audibility of the watermark and to improve the robustness of the watermarking the invention uses phase modification of the audio signal. In the frequency domain, the phase of the audio signal is manipulated by the phase of a reference phase sequence, followed by transform into time domain. Because a change of the audio signal phase over the whole frequency range can be audible, the phase manipulation is carried out with a maximum amount only within one or more small frequency ranges which are located in the higher frequencies and/or in noisy audio signal sections, according to psycho-acoustic principles. Preferably, the allowable amplitude of the phase changes in the remaining frequency ranges is controlled according to psycho-acoustic principles. The watermark is decoded from the watermarked audio signal by correlating it with corresponding inversely transformed candidate reference phase sequences.
摘要翻译：音频信号的水印功能旨在以音频内容的变化不能被人类听觉系统识别的方式操纵音频信号。为了降低水印的可听性并提高水印的鲁棒性，本发明使用音频信号的相位修改。在频域中，音频信号的相位由参考相位序列的相位来操纵，随后变换成时域。因为整个频率范围内的音频信号相位的改变可以是可听见的，所以相位操作仅在位于较高频率和/或噪声音频信号部分的一个或多个小的频率范围内以最大量进行，根据心理原理。优选地，根据心理声学原理来控制剩余频率范围内相位变化的允许振幅。通过将水印与相应的逆变换候选参考相序相关联，从加水印的音频信号中解码水印。

9. 发明申请

US20090235079A1 Method and apparatus for watermarking an audio or video signal with watermark data using a spread spectrum 审中-公开
标题翻译：使用扩展频谱对具有水印数据的音频或视频信号进行水印处理的方法和装置
公开(公告)号：US20090235079A1
公开(公告)日：2009-09-17
申请号：US11921287
申请日：2006-05-03
申请人： Peter Georg Baum , Walter Voessing
发明人： Peter Georg Baum , Walter Voessing
IPC分类号： H04L9/32
CPC分类号： G10L19/018 , G06T1/0028 , G06T1/005 , G06T2201/0065 , G06T2201/0202
摘要： Watermark information (denoted WM) consists of several symbols which are embedded continuously in an audio or a video signal using spread-spectrum. At decoder site the WM is regained using correlation of the received signal with an resequence. According to the invention, not only is the watermark made audio or video signal level dependent (PAS), but also the spreading sequence used for the watermark is made audio or video signal level dependent. This means that the same WM symbol is encoded by several different spreading sequences (NSS). The encoder tests (DEC), which one of these WM symbols or sequences can be retrieved best in a decoder, and embeds that selected spreading sequence WM in the audio or video signal to be watermarked. At decoder side all candidate WM spreading sequences are correlated with the received signal and the spreading sequence with the best match is chosen as the correct one.
摘要翻译：水印信息（表示为WM）包括使用扩展频谱连续嵌入音频或视频信号的几个符号。在解码器站点，使用接收信号与序列的相关性来重新获得WM。根据本发明，不仅水印使音频或视频信号电平依赖（PAS），而且使用于水印的扩展序列使得音频或视频信号水平相关。这意味着相同的WM符号由几种不同的扩展序列（NSS）编码。编码器测试（DEC），这些WM符号或序列中的哪一个可以在解码器中最佳地检索，并将所选择的扩展序列WM嵌入到要加水印的音频或视频信号中。在解码器侧，所有候选WM扩展序列与接收信号相关，并且选择具有最佳匹配的扩展序列作为正确的。

10. 发明授权

US07760790B2 Method and apparatus for transmitting watermark data bits using a spread spectrum, and for regaining watermark data bits embedded in a spread spectrum 有权
标题翻译：用于使用扩展频谱发送水印数据位的方法和装置，以及用于恢复嵌入在扩展频谱中的水印数据位
公开(公告)号：US07760790B2
公开(公告)日：2010-07-20
申请号：US10582031
申请日：2004-09-13
申请人： Peter Georg Baum , Walter Voessing
发明人： Peter Georg Baum , Walter Voessing
IPC分类号： H04B1/00
CPC分类号： H04H20/31 , G10L19/018 , G11B20/00891 , H04H2201/50
摘要： Spread spectrum technology is used for watermarking digital audio signals. To retrieve a watermark signal information bit from the spread spectrum at the receiver or decoder side, the received or replayed spectrum is convolved with a spreading function that is time-inverse with respect to the original spreading function. The pseudo noise sequences are modulated on carrier frequencies which are inserted at one or more frequency bands into the spectrum of an audio signal. The watermark signal decoder checks the frequency bands occupied by such carriers. The frequency band occupation information is signaled in advance, i.e. is transmitted already together with the frame data for the current frame, such that the watermark signal decoder knows before processing the following audio signal frame which carrier frequencies are occupied and must be used for the corresponding carrier demodulation, and which carrier frequencies need not be checked and demodulated.
摘要翻译：扩频技术用于对数字音频信号进行水印处理。为了从接收器或解码器侧的扩展频谱检索水印信号信息位，接收或重放的频谱与相对于原始扩展函数是时间反相的扩展函数进行卷积。伪噪声序列在以一个或多个频带插入到音频信号的频谱中的载波频率上进行调制。水印信号解码器检查这些载波占据的频带。提前发信号通知频带占用信息，即与当前帧的帧数据一起发送，使得水印信号解码器在处理以下音频信号帧之前知道哪些载波频率被占用并且必须用于相应的载波解调，哪些载波频率不需要检查和解调。

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