| 摘要 |
A system to prevent audio watermark detection includes content having a video portion and an audio portion, the audio portion having a watermark, an audio/video separator configured to separate the video portion and the audio portion, and a random number generator configured to generate a random number corresponding to a shifted frequency. The system also includes a frequency shift element configured to apply the shifted frequency to the audio portion to alter a spectrum of the watermark so as to prevent detection of the watermark by a device seeking to recover the watermark. The system also includes an audio resampler configured to resample the audio portion to restore the audio portion to an original length, and an audio/video combiner configured to combine the video portion and the audio portion.
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