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    • 5. 发明授权
    • Method and device for embedding watermark information and method and device for extracting embedded watermark information
    • 用于嵌入水印信息的方法和装置以及用于提取嵌入水印信息的方法和装置
    • US07886152B2
    • 2011-02-08
    • US10502622
    • 2004-07-22
    • Christian NeubauerJuergen HerreRalph KulessaFrank SiebenhaarWolfgang Spinnler
    • Christian NeubauerJuergen HerreRalph KulessaFrank SiebenhaarWolfgang Spinnler
    • H04L9/32
    • G06T1/0085G06T1/005G06T2201/0065
    • For embedding watermark information into an information signal including audio and/or video information, first of all a synchronization sequence with a plurality of synchronization sequence units and a data sequence with a plurality of data sequence units are provided, wherein between the data sequence and the synchronization sequence a time shift is present and wherein a degree of shifting depends on the watermark information. A combination means generates a combination sequence having a plurality of combination sequence units from the synchronization sequence and the data sequence shifted with regard to the synchronization sequence, wherein the combination sequence units are derived from synchronization sequence units and shifted data sequence units. The combination sequence is combined with the information signal in order to embed the watermark information into the information signal. A watermark extractor receives a synchronization sequence correlation peak for every data sequence correlation peak associated with the same and therefore determines the watermark information on the basis of the time interval between the synchronization sequence correlation peak and the data sequence correlation peak in a secure and robust way. The concept is robust, provides a high data rate and is simultaneously flexible with regard to the weighting of synchronization energy and data energy and with regard to the robustness on the one hand and data rate on the other hand, respectively.
    • 为了将水印信息嵌入到包括音频和/或视频信息的信息信号中,首先提供具有多个同步序列单元的同步序列和具有多个数据序列单元的数据序列,其中在数据序列和 同步序列存在时移,其中移位程度取决于水印信息。 组合装置根据同步序列产生具有多个组合序列单元的组合序列和相对于同步序列移位的数据序列,其中组合序列单元从同步序列单元和移位数据序列单元导出。 将组合序列与信息信号组合,以将水印信息嵌入到信息信号中。 水印提取器接收与其相关联的每个数据序列相关峰值的同步序列相关峰值,因此以安全和鲁棒的方式基于同步序列相关峰值与数据序列相关峰值之间的时间间隔来确定水印信息 。 该概念是鲁棒的,提供高数据速率,并且在同步能量和数据能量的加权方面以及另一方面一方面的鲁棒性和数据速率方面同时是灵活的。
    • 10. 发明授权
    • Device and method for embedding a watermark in an audio signal
    • 将音频信号嵌入水印的装置和方法
    • US07346514B2
    • 2008-03-18
    • US10481860
    • 2002-05-10
    • Jürgen HerreRalph KulessaChristian NeubauerFrank Siebenhaar
    • Jürgen HerreRalph KulessaChristian NeubauerFrank Siebenhaar
    • G10L11/00G04L9/00
    • G10L19/018G10L19/02
    • Prior to embedding a watermark in an audio signal, a spectral representation of the audio signal and a spectral representation of the watermark signal are determined. The spectral representation of the watermark signal is then processed on the basis of a psychoacoustic masking threshold of the audio signal. The processed watermark signal is combined with the audio signal to obtain an audio signal bearing a watermark. The spectral representation of the watermark signal is processed iteratively as follows: first a predetermined watermark initial value is selected, then the interference introduced into the spectral representation of the audio signal after a quantization of the spectral representation of the audio signal is determined and then, if the interference introduced by the watermark initial value exceeds the predetermined interference threshold, the watermark initial value is modified progressively until the resulting interference introduced into the spectral representation of the audio signal after quantization is less than or equal to the predetermined interference threshold. The modified watermark initial value at the end of the iteration is used as the processed watermark signal to be combined with the audio signal. As a result it is no longer possible for a watermark to be quantized out. Instead, full control over the energy of the watermark is achieved. A watermark can therefore be embedded in an audio signal to provide either the best possible degree of watermark detectability or the best possible audio quality.
    • 在将音频信号嵌入水印之前,确定音频信号的频谱表示和水印信号的频谱表示。 然后基于音频信号的心理声学屏蔽阈值处理水印信号的频谱表示。 经处理的水印信号与音频信号组合以获得带有水印的音频信号。 水印信号的频谱表示如下进行迭代处理:首先选择一个预定的水印初始值,然后确定音频信号的频谱表示量化后引入到音频信号的频谱表示中的干扰, 如果由水印初始值引入的干扰超过预定的干扰阈值,则水印初始值被逐渐修改,直到引入量化后的音频信号的频谱表示的干扰小于或等于预定的干扰阈值。 使用迭代结束时的修改水印初始值作为与音频信号组合的经处理水印信号。 因此,不可能将水印量化出来。 相反,实现了对水印能量的完全控制。 因此,水印可以嵌入在音频信号中以提供最佳可能程度的水印检测能力或最佳音频质量。