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公开(公告)号：US20050240767A1
公开(公告)日：2005-10-27
申请号：US10516145
申请日：2003-05-21
CPC分类号： G06T1/0028 , H04N1/32149 , H04N1/32304 , H04N2201/3239 , H04N2201/324
摘要： Methods and apparatus for embedding a watermark in a multimedia signal and detecting the watermark, are described. The method comprises the steps of generating a watermark signal comprising a first sequence of values and a second sequence of values; obtaining a first signal portion corresponding to a first channel and a second signal portion corresponding to a second channel from the multimedia signal, said channels being significantly independent; generating a first host modifying signal as a mixture of the first signal portion and the first sequence; generating a second host modifying signal as a mixture of the second signal portion and the second sequence; and generating a watermarked multimedia signal by combining scaled versions of the host modifying signals with the multimedia signal.
摘要翻译： 描述了在多媒体信号中嵌入水印和检测水印的方法和装置。 该方法包括以下步骤：产生水印信号，该水印信号包括第一序列值和第二序列值; 从所述多媒体信号获得对应于第一信道的第一信号部分和对应于第二信道的第二信号部分，所述信道是显着独立的; 产生第一主机修改信号作为第一信号部分和第一序列的混合; 产生第二主机修改信号作为第二信号部分和第二序列的混合; 以及通过将所述主机修改信号的缩放版本与所述多媒体信号组合来生成水印多媒体信号。
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公开(公告)号：US20070036357A1
公开(公告)日：2007-02-15
申请号：US10572621
申请日：2004-09-01
IPC分类号： H04N1/44
CPC分类号： H04N1/32149 , G06T1/005 , G06T2201/0065 , G10L19/018 , H04N2201/3236 , H04N2201/328
摘要： The invention concerns a method and apparatus for embedding and detecting watermarks in a digital host signal. In the embedding method a watermark sequence of length Lw/N bits carrying predetermined information is generated and then up-sampled by a factor N (preferably N=2). At intermediate sampling points of the up-sampled sequence a modified version of the watermark sequence (in preferred arrangements the negative thereof) is inserted to form a compound watermark sequence of length Lw. The compound watermark sequence is then combined with the host signal to watermark the host signal. The invention finds particular advantage in that the need for a spectral whitening stage in the detector is done away with.
摘要翻译： 本发明涉及一种在数字主机信号中嵌入和检测水印的方法和装置。 在嵌入方法中，生成承载预定信息的长度为Lw / N比特的水印序列，然后通过因子N（优选N = 2）进行上采样。 在上采样序列的中间采样点，插入水印序列的修改版本（在其优选布置中为负），以形成长度为Lw的复合水印序列。 然后将复合水印序列与主机信号组合以对主机信号进行水印。 本发明的特征在于，在检测器中需要进行光谱增白阶段。
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公开(公告)号：US20060140406A1
公开(公告)日：2006-06-29
申请号：US10544203
申请日：2004-01-20
IPC分类号： H04N7/167
CPC分类号： G11B20/10527 , G10L13/033 , G10L19/018 , G10L19/035 , G10L25/69 , G11B20/00007 , G11B20/00086 , G11B20/00891
摘要： A method of processing an information signal comprising: applying a signal modification process to an information signal resulting in a processed signal, said signal modification process being controlled by at least one control parameter; comparing the processed signal with the information signal to determine a measure of perceptual quality of the processed signal; and adjusting said at least one control parameter in response to the determined measure of perceptual quality. The method is advantageously used in watermarking and compression systems, that use a model of the Human Auditory or Visual System to control the watermark embedding depth or the compression ratio, and that often fail to maintain a constant signal quality because they ignore other artifacts than the mask-to-noise ratio.
摘要翻译： 一种处理信息信号的方法，包括：对产生处理信号的信息信号应用信号修改处理，所述信号修改过程由至少一个控制参数控制; 将处理的信号与信息信号进行比较，以确定处理信号的感知质量的度量; 以及响应于所确定的感知质量的度量来调整所述至少一个控制参数。 该方法有利地用于水印和压缩系统，其使用人类听觉或视觉系统的模型来控制水印嵌入深度或压缩比，并且通常不能保持恒定的信号质量，因为它们忽略除了 掩蔽噪声比。
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4.发明申请Raising detectability of additonal data in a media signal having few frequency components 审中-公开提高具有较少频率成分的媒体信号中的附加数据的可检测性公开(公告)号：US20060168448A1
公开(公告)日：2006-07-27
申请号：US10560679
申请日：2004-06-15
CPC分类号： H04N1/32149 , G06T1/005 , G06T2201/0052 , G06T2201/0065 , G10L19/018 , H04N1/3216 , H04N1/32203 , H04N1/32352 , H04N7/08 , H04N2201/327
摘要： The present invention relates to a methods, devices, a media signal as well as an information storage medium related to embedding additional data in a media signal. A first adding unit (12) mixes the media signal (x) with a noise signal (n) in order to provide a modified media signal (x+n), and a combiner unit (14) combines additional data (w) with the modified media signal (x+n) through multiplying the modified media signal with the additional data in order to provide a host modifying media signal (mw). In this way the additional data can be detected with a higher certainty in an output signal (y) if the media signal (x) includes few frequency components.
摘要翻译： 本发明涉及一种方法，设备，媒体信号以及与在媒体信号中嵌入附加数据有关的信息存储介质。 第一加法单元（12）将媒体信号（x）与噪声信号（n）混合，以便提供修改的媒体信号（x + n），并且组合器单元（14）将附加数据（w）与 通过将修改的媒体信号与附加数据相乘来修改媒体信号（x + n），以提供主机修改媒体信号（m≠W）。 以这种方式，如果媒体信号（x）包括很少的频率分量，则在输出信号（y）中可以更高的确定性来检测附加数据。
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公开(公告)号：US20050240768A1
公开(公告)日：2005-10-27
申请号：US10516156
申请日：2003-05-21
申请人： Aweke Lemma , Javier Aprea
发明人： Aweke Lemma , Javier Aprea
CPC分类号： G11B20/00086 , G06T1/005 , G10L19/018 , G11B20/00884 , G11B20/00891 , H04N1/32149 , H04N1/32315 , H04N2201/324 , H04N2201/327
摘要： Methods and apparatus for processing a multimedia signal comprising a watermark signal are described. The method includes the steps of: removing at least a portion of the watermark signal, and adding a new watermark signal to the multimedia signal so as to form a new watermarked multimedia signal.
摘要翻译： 描述了用于处理包括水印信号的多媒体信号的方法和装置。 该方法包括以下步骤：去除水印信号的至少一部分，并向多媒体信号添加新的水印信号，以形成新的水印多媒体信号。
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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。
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公开(公告)号：US20050166068A1
公开(公告)日：2005-07-28
申请号：US10509413
申请日：2003-02-26
申请人： Aweke Lemma , Javier Aprea , Leon Van De Kerkhof
发明人： Aweke Lemma , Javier Aprea , Leon Van De Kerkhof
IPC分类号： H03M7/30 , G10L19/018 , G10L19/02 , G11B20/00 , H04L9/00
CPC分类号： G11B20/00891 , G10L19/018 , G10L19/02 , G11B20/00086
摘要： Method and apparatus are described for compensating for time offset in a received signal, so as to correctly align the frame sequence of a received signal to a sequence of transmitted symbols. Each symbol extends over Ts signal samples. The received signal is first divided into a sequence of frames of length Ts, and then each framedivided into a multiplicity of Nb sub-frames. Subsequently, Nb sequences of values are formed, where every successive value in each sequence is derived from the corresponding sub-frame within each successive frame. Each of the Nb sequences is an estimate for the correctly aligned sequence of transmitted symbols.
摘要翻译： 描述了用于补偿接收信号中的时间偏移的方法和装置，以便将接收到的信号的帧序列正确地对准发射符号序列。 每个符号在T信号样本上延伸。 接收到的信号首先被分成长度为T的帧序列，然后被分成多个N个子帧。 随后，形成N个序列的值，其中每个序列中的每个连续值从每个连续帧内的相应子帧导出。 N个子序列中的每一个是正确对齐的发送符号序列的估计。
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公开(公告)号：US20050147248A1
公开(公告)日：2005-07-07
申请号：US10509414
申请日：2003-02-26
申请人： Aweke Lemma , Javier Aprea
发明人： Aweke Lemma , Javier Aprea
CPC分类号： H04H20/31 , G10L19/018 , G11B20/00086 , G11B20/00891 , H04N1/32144
摘要： A window shaping function is described which has an integral over the window shaping function of zero. Compared with conventional window shaping functions, this window shaping function improves the robustness of the watermark signal for a given quality of host signal. Methods and apparatus suitable for utilizing this window shaping function within a watermarking scheme are described.
摘要翻译： 描述了具有零的窗口整形功能的积分的窗口整形功能。 与常规窗口整形功能相比，该窗口整形功能提高了给定质量的主机信号的水印信号的鲁棒性。 描述适用于在水印方案中利用该窗口整形功能的方法和装置。
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公开(公告)号：US20050117056A1
公开(公告)日：2005-06-02
申请号：US10501426
申请日：2002-12-12
CPC分类号： G10L19/022 , H04N21/4307 , H04N21/44016
摘要： An audio encoding scheme or a stream that encodes audio and video data is disclosed. The scheme has particular application in mezzanine-level coding in digital television broadcasting. The scheme has a mean effective audio frame length F that equals the video frame length 1/fV over an integral number M video frames, by provision of audio frames variable in length F in a defined sequence where length=F(j) at encoding. The length of the audio frames may be varied by altering the length of overlap between adjacent frames in accordance with an algorithm that repeats after a sequence of M frames. An encoder and a decoder for such a scheme are also disclosed.
摘要翻译： 公开了音频编码方案或编码音频和视频数据的流。 该方案在数字电视广播的夹层级编码中具有特殊的应用。 该方案通过以规定的顺序提供长度为F的音频帧，具有在整数M个视频帧上等于视频帧长度1 / f
的平均有效音频帧长度F，其中长度 = F（j）。 可以根据在M帧序列之后重复的算法来改变相邻帧之间的重叠长度来改变音频帧的长度。 还公开了一种用于这种方案的编码器和解码器。
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