Transient modeling by matching pursuits with a wavelet dictionary for parametric audio coding
Transient modeling by matching pursuits with a wavelet dictionary for parametric audio coding
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DOI：
10.1109/lsp.2003.822904
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发表时间：
2004-03-01
影响因子：
3.9
通讯作者：
Lopez-Ferreras, F
中科院分区：
文献类型：
--
作者：
Vera-Candeas, P;Ruiz-Reyes, N;Lopez-Ferreras, F
在这封信中，我们提出了一种新颖的基于匹配追踪的瞬态建模方法，并应用于参数音频编码。用于匹配追踪的过完备字典由实现小波包滤波器组的小波函数组成。所提出的瞬态建模方法适合集成到基于正弦三部分模型的参数音频编码器中；瞬态和噪声（STN 模型）。实验结果显示了小波函数和指数阻尼正弦函数之间的比较分析。该方法的均方误差性能优于阻尼正弦曲线。
In this letter, we propose a novel matching pursuit-based method for transient modeling with application to parametric audio coding. The overcomplete dictionary for the matching pursuit is composed of wavelet functions that implement a wavelet-packet filter bank. The proposed transient modeling method is suitable to be integrated into a parametric audio coder based on the three-part model of sines; transients, and noise (STN model). Comparative analysis between wavelet and exponentially damped sinusoidal functions are shown in experimental results. The mean-squared-error performance of the proposed approach is better than that obtained with damped sinusoids.