集群通信中的代数CELP语音压缩编码  

Algebraic Celp Speech Coding in Tetra

作　　者：傅寅飞[1] 刘亚康[1] 朱学勇 

机构地区：[1]电子科技大学抗干扰通信技术国防重点实验室,成都610054

出　　处：《电子科技大学学报》2000年第6期573-577,共5页Journal of University of Electronic Science and Technology of China

基　　金：总装备部预研基金资助项目

摘　　要：描述了欧洲全数字集群系统(TETRA)声码器中的ACELP算法、结构及其技术特点。采用Chebyshev多项式准确有效地估算线谱对(LSP);采用开环和闭环分析相结合进行非整数基音搜索;采用代数码本结构作为固定码本,大大降低了计算复杂度,在频域更好地控制了激励信号的统计特性。ACELP在低于4.8 kb/s的码率下能获得较好的语音质量。In this paper, a kind of Algebraic CELP(ACELP) in TETRA ,which is adopted in the latest generation Trans_European Trunked Radion (TETRA) is described, and its structure and technological characteristics are discussed. Chebyshev polynomial is used to estimate LSPs more efficiently and exactly. Noninteger pitch delay is used in adaptive codebook. For innovation codebook, algebraic codebook is used with more flexibility in closing in the speech redundant signal. Simulation in MATLAB is completed with high quality speech at bite rates below 4.8 kbps.

关 键 词：代数码激励线性预测 线谱对 非整数基音延迟 代数码本 语音压缩编码 

分 类 号：TN912.3[电子电信—通信与信息系统] TN929.52[电子电信—信息与通信工程]