Watermark signal provision and watermark embedding
    10.
    发明公开
    Watermark signal provision and watermark embedding 审中-公开
    Wasserzeichensignalversorger und Wasserzeicheneinbettung

    公开(公告)号:EP2362385A1

    公开(公告)日:2011-08-31

    申请号:EP10154956.6

    申请日:2010-02-26

    IPC分类号: G10L19/00

    摘要: A watermark signal provider (2400) for providing a watermark signal (2440) suitable for being hidden in an audio signal (2430) when the watermark signal is added to the audio signal, such that the watermark signal represents watermark data (2450), is described. The watermark signal provider comprises a psychoacoustical processor (2410) for determining a masking threshold of the audio signal; and a modulator (2420) for generating the watermark signal from a superposition of sample-shaping functions spaced apart from each other at a sample time interval (T b ) of a time-discrete representation of the watermark data, each sample-shaping function being amplitude-weighted with a respective sample of the time-discrete representation, multiplied by a respective amplitude weight depending on the masking threshold, the modulator being configured such that the sample time interval is shorter than a time extension of the sample-shaping functions; and the respective amplitude weight also depends on samples of the time-discrete representation neighboring the respective sample in time.

    摘要翻译: 一种水印信号提供器(2400),用于当将水印信号添加到音频信号时提供适于隐藏在音频信号(2430)中的水印信号(2440),使得水印信号表示水印数据(2450),是 描述。 水印信号提供器包括用于确定音频信号的掩蔽阈值的心理声学处理器(2410) 以及调制器(2420),用于在水印数据的时间离散表示的采样时间间隔(T b)处从彼此间隔开的采样整形功能的叠加产生水印信号,每个采样整形功能是 用时间离散表示的相应样本进行幅度加权,乘以相应的根据掩蔽阈值的幅度权重,调制器被配置为使得采样时间间隔短于样本整形函数的时间延长; 并且相应的振幅权重也取决于在时间上与相应样本相邻的时间离散表示的样本。