本文讨论一种基于音频信号的广告条目检索和定位的一种自适应方法，它利用短时平均过零率和互相关函数从实时音频数据流中快速检测和定位广告条目。

In this paper we discuss a method for audio-based retrieval and location for AD, which USES short time average zero-passed rate and relativity-function to retrieve and locate AD from real-time audio.

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