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1. 发明申请

US20180075852A1 METHOD AND APPARATUS FOR EMBEDDING AND REGAINING WATERMARKS IN AN AMBISONICS REPRESENTATION OF A SOUND FIELD 审中-公开
公开(公告)号：US20180075852A1
公开(公告)日：2018-03-15
申请号：US15561065
申请日：2016-02-18
申请人： THOMSON Licensing
发明人： Xiaoming CHEN , Ulrich GRIES , Peter Georg BAUM , Michael ARNOLD
IPC分类号： G10L19/018 , H04S3/00 , G10L19/008
CPC分类号： G10L19/018 , G10L19/008 , H04S3/008 , H04S2420/11
摘要： As a potential format for next-generation audio, techniques for embedding digital watermarks in the Higher Order Ambisonics (HOA) representation of a sound field have been proposed. The inventive embedding method is adapted for watermarking a two-dimensional or three-dimensional Ambisonics representation of a sound field, wherein the Ambisonics representation is decomposed into directional signals and ambient components and includes estimated dominant directions, and wherein the order of the ambient components can be reduced, and wherein watermark information data are embedded in the directional signals, and at receiver side are regained from the watermarked directional signals.

2. 发明申请

US20160217798A1 METHOD AND APPARATUS FOR DETECTING A WATERMARK SYMBOL IN A SECTION OF A RECEIVED VERSION OF A WATERMARKED AUDIO SIGNAL 审中-公开
标题翻译：在水印音频信号的接收版本中检测水印符号的方法和装置
公开(公告)号：US20160217798A1
公开(公告)日：2016-07-28
申请号：US14911021
申请日：2014-07-25
申请人： THOMSON LICENSING
发明人： Xiaoming CHEN , Peter Georg BAUM , Michael ARNOLD , Ulrich GRIES
IPC分类号： G10L19/018 , G10L19/26
CPC分类号： G10L19/018 , G10L19/26 , H04N1/3232
摘要： In watermark symbol detection for watermarked audio signals a correlation and statistical detection is used, which is computationally complex. Therefore a downsampling can be used prior to the correlation. However, if the watermarked audio signals are transmitted over an acoustic path, without downsampling the detection rate is considerably higher than the detection rate when including downsampling of the correlation input signals. There is a trade-off between calculation complexity and detection robustness. According to the invention, an interpolation of the correlation result values is carried out for input to the statistical detector, in order to approximate the detection robustness of correlation without downsampling.
摘要翻译：在水印音频信号的水印符号检测中，使用相关和统计检测，这在计算上是复杂的。因此，可以在相关之前使用下采样。然而，如果在包括相关输入信号的下采样的情况下，通过声波路径传输加水印的音频信号，而不进行下采样，检测率显着高于检测率。在计算复杂度和检测鲁棒性之间存在折衷。根据本发明，为了输入到统计检测器，执行相关结果值的内插，以便在不进行下采样的情况下近似相关检测鲁棒性。

3. 发明申请

US20160049154A1 METHOD AND APPARATUS FOR DETERMINING WATERMARK SYMBOLS IN A RECEIVED AUDIO SIGNAL THAT CAN CONTAIN ECHOES, REVERBERATION AND/OR NOISE 有权
标题翻译：用于确定可以包含ECHOES，REVERBERATION和/或NOISE的接收音频信号中的水标记的方法和装置
公开(公告)号：US20160049154A1
公开(公告)日：2016-02-18
申请号：US14781960
申请日：2014-03-28
申请人： THOMSON LICENSING
发明人： Xiaoming CHEN , Peter Georg BAUM , Michael ARNOLD , Ulrich GRIES
IPC分类号： G10L19/018
CPC分类号： G10L19/018 , G06F2221/0733 , G11B20/00884 , G11B20/00891
摘要： Following transmission of a watermarked audio signal over an acoustic path causing echoes, reverberation and/or noise, watermark detection correlation result peak values are concentrated within a limited temporal range around main correlation result peaks, which limited temporal range is much smaller than the total correlation length. The watermark detection is based on the following: given np correlation result peak values v=(v1, v2, . . . , vnp) in an average or expected probability distribution for correlation result values for unmarked content, the probability is calculated that within windows covering the limited temporal range there are np or more values from a correlation result value set greater than or equal to these peaks v.
摘要翻译：在通过导致回波，混响和/或噪声的声学路径上传输水印音频信号之后，水印检测相关结果峰值集中在主相关结果峰值附近的有限时间范围内，其限制的时间范围远小于总相关长度。水印检测基于以下内容：给定np相关结果峰值v =（v1，v2，...，vnp）在未标记内容的相关结果值的平均或预期概率分布中，计算出窗口内的概率覆盖有限的时间范围，存在来自大于或等于这些峰v的相关结果值的np或更多值。

4. 发明申请

US20150221317A1 METHOD AND APPARATUS FOR WATERMARKING SUCCESSIVE SECTIONS OF AN AUDIO SIGNAL 有权
标题翻译：用于水印音频信号的后续部分的方法和装置
公开(公告)号：US20150221317A1
公开(公告)日：2015-08-06
申请号：US14613435
申请日：2015-02-04
申请人： THOMSON LICENSING
发明人： Peter Georg BAUM , Xiaoming Chen , Michael Arnold , Ulrich Gries
IPC分类号： G10L19/018
CPC分类号： G10L19/018
摘要： Audio watermarking is the process of embedding watermark information items into an audio signal in an in-audible manner. In a first embodiment, in case the original audio signal has parts of low signal energy, an alternative signal having a level or strength given by the psycho-acoustic model is combined with the original audio signal. The combined signal is watermarked with watermark data to be embedded. In a second embodiment, in case the original audio signal has parts of low signal energy, an alternative signal having a level or strength given by the psycho-acoustic model is watermarked with watermark data to be embedded, and the audio signal is watermarked with the watermark data to be embedded. The watermarked alternative signal is combined with the watermarked audio signal.
摘要翻译：音频水印是以可听见的方式将水印信息项嵌入到音频信号中的过程。在第一实施例中，在原始音频信号具有低信号能量的部分的情况下，具有由心理 - 声学模型给出的等级或强度的替代信号与原始音频信号组合。组合信号用要嵌入的水印数据加水印。在第二实施例中，在原始音频信号具有低信号能量的一部分的情况下，具有由心理 - 声学模型给出的等级或强度的替代信号用要嵌入的水印数据进行水印，并且音频信号用要嵌入的水印数据。水印的替代信号与加水印的音频信号组合。

5. 发明申请

US20160379653A1 METHOD AND APPARATUS FOR INCREASING THE STRENGTH OF PHASE-BASED WATERMARKING OF AN AUDIO SIGNAL 有权
标题翻译：提高音频信号相位水印强度的方法与装置
公开(公告)号：US20160379653A1
公开(公告)日：2016-12-29
申请号：US15191855
申请日：2016-06-24
申请人： THOMSON LICENSING
发明人： Michael ARNOLD , Peter Georg BAUM , Xiaoming CHEN , Ulrich GRIES
IPC分类号： G10L19/018 , G10L19/02
CPC分类号： G10L19/018 , G10L19/0204
摘要： A challenge of audio watermarking systems in which an acoustic path is involved is the robustness against microphone pickup in case of surrounding noise. The strength of phase-based watermarking is increased by determining a masking threshold for a current frequency bin in a frequency/phase representation changing the phase based on that masking threshold and an allowed phase change value, calculating an allowed magnitude change value for the current frequency bin and calculating from an audio quality level value a magnitude change scaling factor for the magnitude change value, and increasing its magnitude accordingly.
摘要翻译：涉及声学路径的音频水印系统的挑战是在周围噪声的情况下对麦克风拾取的鲁棒性。通过基于该掩蔽阈值和允许的相位变化值来确定在频率/相位表示中改变相位的当前频率仓的掩蔽阈值来增加基于相位的水印的强度，计算当前频率的允许幅度变化值并且根据音频质量电平值计算幅度变化值的幅度变化缩放因子，并且相应地增加其幅度。

6. 发明申请

US20160314795A1 METHOD AND APPARATUS FOR WATERMARKING AN AUDIO SIGNAL 审中-公开
标题翻译：用于水印音频信号的方法和装置
公开(公告)号：US20160314795A1
公开(公告)日：2016-10-27
申请号：US15102893
申请日：2014-12-01
申请人： THOMSON LICENSING
发明人： Peter Georg BAUM , Xiaoming CHEN , Michael ARNOLD , Ulrich GRIES
IPC分类号： G10L19/018 , G10L19/24 , G10L21/0232
CPC分类号： G10L19/018 , G10L19/24 , G10L21/0232
摘要： Improvement of water-mark detection in watermarked microphone audio signals picked up in the presence of surrounding noise is achieved by using at encoder side not only the originally received signal for the calculation of the masking threshold and the watermarking strength, but by also taking into account the level of the surrounding noise. This enables an adaptation of the watermarking strength to the current sound pressure level SPL of the surrounding noise. If the SPL of the surrounding noise is increased, the watermarking strength will be increased accordingly. The resulting advantage is a significantly improved audio watermark detection in the presence of surrounding noise.
摘要翻译：通过在编码器侧不仅使用原始接收的信号来计算掩蔽阈值和水印强度，而且还考虑周围噪音的水平。这使得能够将水印强度适应于周围噪声的当前声压级SPL。如果周围噪声的SPL增加，则水印强度将相应增加。所产生的优点是在存在周围噪声的情况下显着改进的音频水印检测。

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