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感知音频编码是音频信号存储和传输的主流技术。数字音频水印技术和感知音频编码技术相结合,在音频信号中嵌入水印数据。在保证合成音频信号质量不发生可察觉变化的同时,充分保证水印数据的健壮性。文中首先介绍了数字水印系统的概况,然后讨论了数字音频水印系统的特点和要求,比较了常用的数字音频水印技术,接着重点讨论了基于扩频技术的数字音频水印系统的实现方案,最后归纳了数字音频水印的典型应用。
Perceptual audio coding is the mainstream technology for storing and transmitting audio signals. The combination of digital audio watermarking technology and perceptual audio coding technology embeds watermarking data in the audio signal. While guaranteeing that the quality of the synthesized audio signal does not change appreciably, the robustness of the watermark data is fully guaranteed. First of all, this paper introduces the general situation of digital watermarking system, then discusses the characteristics and requirements of digital audio watermarking system, compares the commonly used digital audio watermarking technology, and then focuses on the realization of digital audio watermarking system based on spread spectrum technology. Finally, A typical application of digital audio watermarking.