一种基于鲁棒矢量量化的信源-信道联合编码算法  

Algorithm for source-channel coding based on robust vector quantization

作　　者：朱勇刚[1] 陈亮[1] 朱义勇[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《解放军理工大学学报（自然科学版）》2005年第2期118-122,共5页Journal of PLA University of Science and Technology(Natural Science Edition)

摘　　要：信源-信道联合编码是数字通信中编码与传输的关键技术之一。在分析经典算法的基础上,结合语音编码中的声道参数,提出了采用似然比作为测度的信源-信道联合编码算法,同时通过多级分裂矢量量化进一步提高编码参数的量化精度。定点仿真结果表明,该算法的量化精度较传统方法性能提高了近41 %。Source-channel coding is an important technology in digital communications.In this paper,several classic source-channel coding algorithms were discussed.Together with vocal tract parameter,the algorithm based on Likelihood-ratio distortion was presented.Multi-stage and split vector quantization which can further reduce distortion was simulated. Compared with traditional algorithm, additional 41% of the distortion was reduced. And the robustness of the system was enhanced without additional channel source.

关 键 词：编码算法 矢量量化 信道 信源 量化精度 关键技术 数字通信 联合编码 经典算法 语音编码 编码参数 仿真结果 传统方法 似然比 鲁棒性 基础 传输 声道 定点 

分 类 号：TN919.81[电子电信—通信与信息系统] TN919.8[电子电信—信息与通信工程]