鲁棒音频水印同步方法的比较

Joji Yamada, K. Kondo
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引用次数: 0

摘要

本文比较了几种用于音频水印的帧同步方法。m序列被嵌入到主机信号的相位中进行同步。比较了交叉功率谱相位分析(CSPA)和平滑相干变换(SCT)方法对加性噪声的检测精度。当对相关性进行5点平滑处理时,CSPA的检测率提高了约30%。我们计划使用CSPA测试其他劣化,包括模拟通道。
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Comparison of synchronization methods for robust audio watermarks
In this paper, we compared a number of frame synchronization methods for audio watermarks. M-sequence was embedded into the phase of the host signal for synchronization. We compared the detection accuracy of the Cross-power Spectrum Phase Analysis (CSPA) and the Smoothed Coherence Transform (SCT) method for additive noise. The CSPA showed higher detection rates by about 30% when 5-point smoothing was applied to the correlation. We plan to test other deterioration including analog channels using the CSPA.
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