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| 集群通信中的代数CELP语音压缩编码 | |
| 引用本文： | 傅寅飞,刘亚康,朱学勇. 集群通信中的代数CELP语音压缩编码[J]. 电子科技大学学报(社会科学版), 2000, 0(6) |
| 作者姓名： | 傅寅飞 刘亚康 朱学勇 |
| 作者单位： | 电子科技大学抗干扰通信技术国防重点实验室!成都610054 |
| 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。 |
| 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 |
Algebraic Celp Speech Coding in Tetra |
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| Fu Yinfei,Liu Yakang,Zhu Xueyong. Algebraic Celp Speech Coding in Tetra[J]. Journal of University of Electronic Science and Technology of China(Social Sciences Edition), 2000, 0(6) | |
| Authors: | Fu Yinfei Liu Yakang Zhu Xueyong |
| Abstract: | 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. |
| Keywords: | algebraic code excited linear prediction line spectrum pair noninteger pitch delay algebraic codebook speech compression coding |
| 本文献已被 CNKI 等数据库收录！ | |