基于方差-平坦测度的音频瞬态段检测算法  

Transient Signals Detection Method Based on Variance and Flatness Measure

作　　者：周延献[1] 张涛[1] 王赞[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《电声技术》2012年第2期64-66,共3页Audio Engineering

摘　　要：瞬态段检测算法是数字音频信号编码前进行预处理的关键算法之一,其性能优劣直接影响到编码复杂度以及编码质量。提出了一种基于方差与平坦测度相综合的瞬态段检测算法,实验结果表明,本算法能够有效减少低能量瞬态段的冗余检测,并且可以以比帧更小的信号段作为检测对象,提高了时间分辨率,检测结果更能接近信号的实际情况,提高了编码质量。此外,本算法还具有检测准确度高、算法简单等优点。Transient detection is one of key algorithms in perceptual audio coding. Its performance directly affects the complexity and quality in audio coding. A combined transient detection algorithm based on variance and flatness measure is presented. Tested by emulator, the method has much less redundancy detection of low energy transient signals and quality of missed in audio coding and gets detection results closer to the actual situation of signal. In addition, this algorithm has high detection precision and simple algorithm realization.

关 键 词：感知音频编码 瞬态段检测 平坦测度 方差 

分 类 号：TN912.3[电子电信—通信与信息系统]