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    • 7. 发明申请
    • METHODS AND APPARATUS TO PERFORM AUDIO WATERMARKING AND WATERMARK DETECTION AND EXTRACTION
    • 执行音频水印和​​水印检测和提取的方法和设备
    • US20090259325A1
    • 2009-10-15
    • US12249619
    • 2008-10-10
    • Alexander Pavlovich TopchyArun RamaswamyVenugopal Srinivasan
    • Alexander Pavlovich TopchyArun RamaswamyVenugopal Srinivasan
    • G06F17/00
    • G10L19/018G10L19/022G10L19/06G10L25/18H04H20/31H04H60/31H04H2201/50H04N19/467H04N21/23892H04N21/8358
    • Encoding and decoding methods and apparatus as described. In one example, a method of embedding auxiliary information into an audio signal includes sampling the audio signal to create an audio block; receiving a code; determining frequency components that will be used to represent the code, wherein different sets of frequency components represent respectively different information and wherein one frequency component from each set of frequency components is located in a code band and there are multiple code bands and spacing between adjacent code bands is equal to or less than the spacing between adjacent frequency components of each code band; determining amplitudes of the frequency components that will be used to represent the information, wherein the amplitudes of the frequency components are determined by a masking ability of the audio block; synthesizing the frequency components that will be used to represent the information, wherein the frequency components are synthesized with the determined amplitudes; and combining the synthesized code frequency components with the audio block.
    • 编码和解码方法和装置如上所述。 在一个示例中,将辅助信息嵌入到音频信号中的方法包括对音频信号进行采样以创建音频块; 接收代码; 确定将用于表示代码的频率分量,其中不同组的频率分量分别表示不同的信息,并且其中来自每组频率分量的一个频率分量位于码带中,并且存在多个码带和相邻码之间的间隔 频带等于或小于每个码带的相邻频率分量之间的间隔; 确定将用于表示信息的频率分量的幅度,其中频率分量的幅度由音频块的掩蔽能力确定; 合成将用于表示信息的频率分量,其中以确定的振幅合成频率分量; 以及将合成的代码频率分量与音频块组合。