1.8～2.4kbps多带激励语音编码器  

Multiband excitation coding of speech at 1.8~2.4 kbps

作　　者：张军[1] 韦岗[1] 肖自美[2] 

机构地区：[1]华南理工大学电子与通信工程系,广州510641 [2]中山大学电子系,广州510275

出　　处：《声学学报》2002年第5期398-404,共7页Acta Acustica

基　　金：国家自然科学基金(69896246);广东省"千百十人才工程"计划资助的研究

摘　　要：在多带激励（MultiBand Excitation,MBE）语音模型的基础上提出了一种基于基音处频域误差函数特性的快速基音细搜索算法和一种基于 MBE-LPC与 VDVQ（Variable-Dimension Vector Quantization）的可分级谱幅度矢量量化方案,实现了一种 1.8～2.4 kbps可分级的 MBE语音编码器。实验结果表明木文所实现 MBE编码器在保持与常规同速率的MBE-VDVQ合成质量相当的同时能大幅度减少所需的运算量和存储空间。A new fast pitch-refining algorithm of MBE model, which is based on the feature of frequency domain error function around pitch, and a new scalable quantization scheme of spectral envelope magnitude, which is based on MBE-LPC model and Variable-Dimension Vector Quantization (VDVQ), are proposed. A 1.8 - 2.4 kbps scalable MBE coder is implemented with the new pitch-refining algorithm and the new quantization scheme. Experiment result shows that this MBE coder achieves the same synthesis quality as the original MBE-VDVQ coder in the same bit rate with much less computation and memory .

关 键 词：多带激励语音编码器 语音编码 语音信号处理 MBE语音模型 

分 类 号：TN912.3[电子电信—通信与信息系统] TN762[电子电信—信息与通信工程]