WATERMARK SIGNAL PROVISION AND WATERMARK EMBEDDING
    2.
    发明申请
    WATERMARK SIGNAL PROVISION AND WATERMARK EMBEDDING 有权
    水印信号和水印嵌入

    公开(公告)号:US20130218314A1

    公开(公告)日:2013-08-22

    申请号:US13593016

    申请日:2012-08-23

    IPC分类号: G10L19/018

    摘要: A watermark signal provider provides a watermark signal suitable for being hidden in an audio signal when the watermark signal is added to the audio signal, such that the watermark signal represents watermark data. The watermark signal provider includes a psychoacoustical processor for determining a masking threshold of the audio signal; and a modulator for generating the watermark signal from a superposition of sample-shaping functions spaced apart from each other at a sample time interval 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: 当水印信号被添加到音频信号时,水印信号提供器提供适于隐藏在音频信号中的水印信号,使得水印信号表示水印数据。 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; 以及调制器,用于在水印数据的时间离散表示的采样时间间隔处从彼此间隔开的采样整形功能的叠加产生水印信号,每个采样整形功能用相应样本进行幅度加权 所述时间离散表示根据掩蔽阈值乘以相应的幅度权重,所述调制器被配置为使得所述采样时间间隔短于所述采样整形功能的时间延长; 并且相应的振幅权重也取决于相应样本在时间上相邻的时间离散表示的样本。