Techniques for Improving the Accuracy of Sinusoidal Tracking
Techniques for Improving the Accuracy of Sinusoidal Tracking
复制标题
提高正弦跟踪精度的技术
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
R. González
中科院分区：
文献类型：
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作者：
Stuart K. Marks;R. González
本文针对文献[1]中提出的启发式正弦跟踪算法，提出了三种提高精度的新技术。当应用于音频编码时，这些技术将传统的语音编码方法扩展到真正的宽带音频编码。这些技术提供了适当的多分辨率正弦跟踪、跨多个变量而不仅仅是频率匹配，以及跨正弦轨迹对这些变量的全局优化。当这些技术一起使用时，创建了启发式跟踪算法，该算法具有作为隐马尔可夫模型(HMM)问题的跟踪算法的许多优点，但计算和实现复杂性要低得多。
This paper proposes three novel techniques for improving the accuracy of the heuristic sinusoidal tracking algorithm proposed in [1]. When applied to audio coding these techniques extend the traditionally speech coding approach into true wideband audio coding. These techniques provide proper multiresolution sinusoidal tracking, matching across a number of variables instead of frequency alone, and global optimization of these variables across sinusoidal tracks. When these techniques are used together a heuristic tracking algorithm is created which has many of the benefits of tracking algorithms formulated as a Hidden Markov Model (HMM) problem, but at a far reduced computational and implementation complexity.