正弦参数自适应联合量化

发布时间：2018-05-15 00:42

本文选题：高速率原理 + 正弦编码　；参考：《电子学报》2014年04期

【摘要】：为实现音频信号的低速率编码,提出一种正弦参数量化的新方案.该方案利用人耳掩蔽效应和实时参数统计特性,基于高速率原理建立并显式求解率失真优化问题,得到具有解析形式的参数量化器,实现了在正弦分量间和正弦参数间动态分配编码比特.本量化方案无迭代运算过程,适合实时低速率音频编码应用.与经典方法比较,平均比特速率每正弦减少约17%.当速率大于15bit/正弦,重建信号的感觉失真小于球形量化方案.
[Abstract]:In order to realize the low rate coding of audio signal, a new scheme of sinusoidal parameter quantization is proposed. Based on the high rate principle and the real time parameter statistics, the method is used to solve the rate-distortion optimization problem, and a parameter quantizer with analytical form is obtained. Dynamic allocation of coding bits between sinusoidal components and sinusoidal parameters is realized. This quantization scheme has no iterative operation and is suitable for real-time low-rate audio coding applications. Compared with the classical method, the average bit rate decreases by about 17 times per sinusoidal rate. When the rate is greater than the 15bit/ sinusoidal, the sensory distortion of the reconstructed signal is less than that of the spherical quantization scheme.
【作者单位】：北京石油化工学院信息工程学院;
【基金】：北京市教育委员会科技计划(No.KM201310017009)
【分类号】：TN912.3

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