公开(公告)号：EP2569766A1

公开(公告)日：2013-03-20

申请号：EP11716274.3

申请日：2011-04-27

申请人： Thomson Licensing

发明人： CHEN, Xiao-Ming ,  BAUM, Peter, Georg ,  ARNOLD, Michael ,  GRIES, Ulrich

IPC分类号： G10L19/00 ,  G06T1/00

CPC分类号： G10L19/018

摘要： Watermark symbol detection requires a detection metric for deciding at decoder side which candidate symbol is embedded inside the audio or video signal content. The invention provides an improved detection metric processing that achieves a reliable detection of watermarks in the presence of additional noise and echoes, and that is adaptive to signal reception conditions and requires a decreased computational power. This is performed by taking into account the information contained in the echoes of the received audio signal in the decision metric and comparing it with the corresponding metric obtained from decoding a non-marked audio signal, based on recursive calculation of false positive detection rates of peaks in correlation result values. The watermark symbol corresponding to the reference sequence having the lowest false positive error is selected as the embedded one.

公开(公告)号：EP3129983A1

公开(公告)日：2017-02-15

申请号：EP15710807.7

申请日：2015-03-20

申请人： Thomson Licensing

发明人： BAUM, Peter Georg ,  CHEN, Xiao-Ming ,  ARNOLD, Michael ,  GRIES, Ulrich

IPC分类号： G10L19/018

CPC分类号： G10L19/018

摘要： For determining in a 2nd screen whether or not watermarked audio content received from a 1st screen has been stopped, a watermark symbol detection in the received audio content and a related detection strength value determination is carried out. In case no watermark symbol has been detected, a received expected detection strength value is compared with a detection strength threshold value. If the expected detection strength value is greater than the detection strength threshold value, it is decided that content has been stopped in the 1st screen device. If not, it is decided that content has not been stopped in the 1st screen device. In case a watermark symbol has been detected, the detection strength value is compared with the expected detection strength value, a correspondingly updated detection strength threshold value is calculated, and it is decided that the content has not been stopped in the 1st screen device.

摘要翻译： 对于在第二画面是否水印从第一屏接收到的音频内容已停止开采的确定性，在接收到的音频内容的水印符号检测和相关的检测强度值进行判断。 在情况下，没有水印符号已被检测到，接收到的预期的检测强度值与一个检测强度阈值进行比较。 如果预期的检测强度值比检测强度阈值时，则判定没有内容已经在第一屏设备已经停止。 如果不是，它决定并处理不当的内容在第一屏设备已经停止。 在情况下，水印符号已被检测，检测强度值与预期的检测强度值，相应更新的检测强度阈值的计算相比，它是决定做了内容并没有在第一屏设备已经停止。

公开(公告)号：EP2601756A1

公开(公告)日：2013-06-12

申请号：EP11737948.7

申请日：2011-07-26

申请人： Thomson Licensing

发明人： ARNOLD, Michael ,  BAUM, Peter Georg ,  GRIES, Ulrich ,  VOESSING, Walter

IPC分类号： H04L9/00 ,  G06T1/00

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.

公开(公告)号：EP1543656A1

公开(公告)日：2005-06-22

申请号：EP03783983.4

申请日：2003-06-21

申请人： Thomson Licensing S.A.

发明人： GRIES, Ulrich

IPC分类号： H04L12/28 ,  H04L12/64 ,  H04L1/08 ,  H04L29/06

CPC分类号： H04L1/08 ,  H04L12/1863 ,  H04L12/2803 ,  H04L12/2838 ,  H04L12/40117

摘要： The invention refers to a method for performing communication on a bus structured network between master device AV1 and slave devices AV2, PC, LSij, DSij using a bi-directional data stream DSA for secure communication and a unidirectional data stream DSI for real-time communication. According to the invention the unidirectional data stream DSI is used for a certain type of secure communication CIV, CIB between a master device AV1 and at least one slave device AV2, PC, LSij, DSij.

公开(公告)号：EP3031049A1

公开(公告)日：2016-06-15

申请号：EP14742548.2

申请日：2014-07-25

申请人： Thomson Licensing

发明人： CHEN, Xiao-Ming ,  BAUM, Peter Georg ,  ARNOLD, Michael ,  GRIES, Ulrich

IPC分类号： G10L19/018 ,  H04N1/32

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： 在用于水印的音频信号水印检测符号的相关和统计检测被使用，所有这些都在计算上复杂的。 因此，一个下采样可以先于相关性来使用。 然而，如果水印的音频信号为反式mitted到声学路径，而不采样检测率比检测率当包括相关输入信号的下采样高得多。 有计算复杂度和检测鲁棒性之间进行权衡。 。根据本发明的相关结果值的内插进行以输入到统计检测器中，为了近似相关的检测的鲁棒性，而不降采样。

公开(公告)号：EP2569766B1

公开(公告)日：2015-10-14

申请号：EP11716274.3

申请日：2011-04-27

申请人： Thomson Licensing

发明人： CHEN, Xiao-Ming ,  BAUM, Peter, Georg ,  ARNOLD, Michael ,  GRIES, Ulrich

IPC分类号： G10L19/018

CPC分类号： G10L19/018

摘要： Watermark symbol detection requires a detection metric for deciding at decoder side which candidate symbol is embedded inside the audio or video signal content. The invention provides an improved detection metric processing that achieves a reliable detection of watermarks in the presence of additional noise and echoes, and that is adaptive to signal reception conditions and requires a decreased computational power. This is performed by taking into account the information contained in the echoes of the received audio signal in the decision metric and comparing it with the corresponding metric obtained from decoding a non-marked audio signal, based on recursive calculation of false positive detection rates of peaks in correlation result values. The watermark symbol corresponding to the reference sequence having the lowest false positive error is selected as the embedded one.

公开(公告)号：EP2896041A1

公开(公告)日：2015-07-22

申请号：EP13758814.1

申请日：2013-08-29

申请人： Thomson Licensing

发明人： BAUM, Peter Georg ,  CHEN, Xiao-Ming ,  ARNOLD, Michael ,  GRIES, Ulrich

IPC分类号： G10L19/018

CPC分类号： G10L19/018 ,  G10L19/265

摘要： Many watermarking detection algorithms are correlation based, whereby an input signal is correlated with reference signals. The correlation with the best match determines the bit value of the watermark information. Usually a watermarked signal undergoes distortion before being fed to a watermark detector. However, the modification is stronger in some frequency ranges than in others. According to the invention, the correlation result for a current input signal section is in addition used for estimating the optimal frequency range or ranges for the following section's correlation, using a cumulative correlation value curve.

公开(公告)号：EP1543656B1

公开(公告)日：2006-08-09

申请号：EP03783983.4

申请日：2003-06-21

申请人： Thomson Licensing

发明人： GRIES, Ulrich

IPC分类号： H04L12/28 ,  H04L12/64 ,  H04L1/08 ,  H04L29/06

CPC分类号： H04L1/08 ,  H04L12/1863 ,  H04L12/2803 ,  H04L12/2838 ,  H04L12/40117

摘要： The invention refers to a method for performing communication on a bus structured network between master device AV1 and slave devices AV2, PC, LSij, DSij using a bi-directional data stream DSA for secure communication and a unidirectional data stream DSI for real-time communication. According to the invention the unidirectional data stream DSI is used for a certain type of secure communication CIV, CIB between a master device AV1 and at least one slave device AV2, PC, LSij, DSij.

公开(公告)号：EP3129983B1

公开(公告)日：2018-05-09

申请号：EP15710807.7

申请日：2015-03-20

申请人： Thomson Licensing

发明人： BAUM, Peter Georg ,  CHEN, Xiao-Ming ,  ARNOLD, Michael ,  GRIES, Ulrich

IPC分类号： G10L19/018

CPC分类号： G10L19/018

摘要： For determining in a 2nd screen whether or not watermarked audio content received from a 1st screen has been stopped, a watermark symbol detection in the received audio content and a related detection strength value determination is carried out. In case no watermark symbol has been detected, a received expected detection strength value is compared with a detection strength threshold value. If the expected detection strength value is greater than the detection strength threshold value, it is decided that content has been stopped in the 1st screen device. If not, it is decided that content has not been stopped in the 1st screen device. In case a watermark symbol has been detected, the detection strength value is compared with the expected detection strength value, a correspondingly updated detection strength threshold value is calculated, and it is decided that the content has not been stopped in the 1st screen device.

公开(公告)号：EP3274990A1

公开(公告)日：2018-01-31

申请号：EP16705498.0

申请日：2016-02-18

申请人： Thomson Licensing

发明人： CHEN, Xiaoming ,  GRIES, Ulrich ,  BAUM, Peter Georg ,  ARNOLD, Michael

IPC分类号： G10L19/018 ,  G11B20/00 ,  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 water-marking 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.