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1. 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。

2. 发明申请

US20070116324A1 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：US20070116324A1
公开(公告)日：2007-05-24
申请号：US10582031
申请日：2004-09-13
申请人： Peter Baum , Walter Voessing
发明人： Peter Baum , Walter Voessing
IPC分类号： G06K9/00
CPC分类号： H04H20/31 , G10L19/018 , G11B20/00891 , H04H2201/50
摘要： Spread spectrum technology and the related inserted or added information signal can be used for implementing watermarking digital audio signals. A known processing for retrieving at receiver or decoder side the watermark signal information bit from the spread spectrum is convolving the received or replayed spectrum with a spreading function that is time-inverse with respect to the original spreading function. The pseudo noise sequences are modulated one or more 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. According to the invention, the frequency band occupation information is signalled in advance, i.e. is trans-mitted 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 frequency or 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：扩展频谱技术和相关的插入或添加信息信号可用于实现水印数字音频信号。在接收机或解码器侧检索来自扩频的水印信号信息比特的已知处理是用接收或重放的频谱与相对于原始扩展函数的时间反相的扩展函数进行卷积。伪噪声序列被调制为在一个或多个频带插入到音频信号的频谱中的一个或多个载波频率。水印信号解码器检查这些载波占据的频带。根据本发明，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个载波频率或频率被占用，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。

3. 发明授权

US4821260A Transmission system 失效
标题翻译：传输系统
公开(公告)号：US4821260A
公开(公告)日：1989-04-11
申请号：US135511
申请日：1987-12-16
申请人： Otto Klank , Ernst Schroder , Walter Voessing
发明人： Otto Klank , Ernst Schroder , Walter Voessing
IPC分类号： G10L19/00 , H04B1/66 , H04B14/04 , H04J3/00 , H04L27/20
CPC分类号： H04B1/66
摘要： A system for transmitting and receiving digitalized audio signals, particularly via satellites, wherein data sequences are arranged in timely succession within frames, wherein before transmission, the digitalized audio signal is converted to a digital signal representing the momentary frequency spectrum and, during subsequent coding of the digital audio signal to be transmitted, portions of this transformed signal are given different weights on the basis of psychoacoustic laws with respect to the accuracy of their representation.
摘要翻译：一种用于特别经由卫星发送和接收数字化音频信号的系统，其中数据序列被及时地依次排列在帧内，其中在传输之前，数字化音频信号被转换成表示瞬时频谱的数字信号，并且在随后的编码期间要传输的数字音频信号，这个变换信号的一部分在心理声学规律的基础上就其表示的准确性给出不同的权重。

4. 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。

5. 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。

6. 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。

7. 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。

8. 发明申请

US20060212710A1 Method and apparatus for encoding symbols carrying payload data for watermarking an audio or video signal, and method and apparatus for decoding symbols carrying payload data of a watermarked audio or video signal 有权
标题翻译：用于编码携带用于对音频或视频信号进行加水印的有效载荷数据的符号的符号的方法和装置，以及用于解码承载带有水印的音频或视频信号的有效载荷数据的符号的方法和装置
公开(公告)号：US20060212710A1
公开(公告)日：2006-09-21
申请号：US11376530
申请日：2006-03-15
申请人： Peter Baum , Walter Voessing
发明人： Peter Baum , Walter Voessing
IPC分类号： H04L9/00
CPC分类号： G06T1/005 , G06T1/0028 , 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. At decoder site the WM is regained using correlation of the received signal with an m-sequence if Spread Spectrum is used. In some watermark technology the watermark information is transmitted asynchronously, i.e. it is continuously tested whether or not WM can be embedded imperceptible within the audio or video signals. Only if this is true a WM frame is transmitted. But a WM frame consists of some tens of symbols, each carrying one or more bits which are transmitted synchronously. That means, if the period in which the WM can be embedded is shorter than the frame length, some symbols cannot be recovered at receiver side. According to the invention, each WM symbol carries an ID item in addition to its normal payload, and it is already tested in the encoder whether or not the signal is good enough so that the embedded symbol can be recovered at decoder side. If true, it is embedded. If not true, no WM is embedded for the length of one symbol and the test is repeated for the following symbol. The sequence of IDs is known at the encoder which can therefore detect using the ID whether or not a symbol has been skipped.
摘要翻译：水印信息（表示为WM）由连续嵌入音频或视频信号的几个符号组成。在解码器位置，如果使用扩频，则使用接收信号与m序列的相关性来重新获得WM。在一些水印技术中，水印信息是异步发送的，即连续测试WM是否可以在音频或视频信号内嵌入不可察觉的信号。只有这样，才发送WM帧。但是WM帧由几十个符号组成，每个符号携带一个或多个同步传输的位。这意味着，如果可嵌入WM的周期短于帧长度，则在接收机侧无法恢复某些符号。根据本发明，每个WM符号除了其正常有效载荷之外还携带ID项目，并且已经在编码器中测试了信号是否足够好，使得嵌入符号可以在解码器侧被恢复。如果是，它是嵌入的。如果不是真的，则不会为一个符号的长度嵌入WM，并为以下符号重复测试。 ID的序列在编码器处是已知的，因此可以使用ID来检测符号是否被跳过。

9. 发明授权

US4942607A Method of transmitting an audio signal 失效
标题翻译：发送音频信号的方法
公开(公告)号：US4942607A
公开(公告)日：1990-07-17
申请号：US152026
申请日：1988-02-03
申请人： Ernst Schroder , Walter Voessing
发明人： Ernst Schroder , Walter Voessing
IPC分类号： G10L19/00 , H04B1/66 , H04B14/04
CPC分类号： H04B1/665
摘要： A method of digital transmission of an audio signal, in which in order to save transmission and/or memory capacity, the digital signal is converted, before transmission, into signals representing the short-term spectrum of time sections of the digital signal and portions of this signal are processed on the basis of psycho-acoustic laws, with portions of this signal lying below given thresholds left unconsidered, with at least one first threshold being defined below which only amplitude values outside of psycho-acoustically differentiable frequency ranges are left unconsidered.
摘要翻译：一种音频信号的数字传输方法，其中为了节省传输和/或存储器容量，数字信号在传输之前被转换成表示数字信号的时间段的短期频谱的信号和该信号基于心理 - 声学规律被处理，该信号的部分低于给定阈值，未被考虑，其中至少一个第一阈值被定义在下面，仅在心理声学上可区分的频率范围之外的振幅值被忽略。

10. 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。

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