LT编译码算法的DSP实现  

Implementation of Encoding and Decoding Algorithm of LT Codes Based on DSP

作　　者：师歌[1] 高宏峰[1] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471000

出　　处：《电视技术》2012年第21期63-66,共4页Video Engineering

摘　　要：采用TI公司的TMS320VC5416芯片,设计和实现了LT编译码器。鉴于LT编译码器的数据运算量和内存使用量随编码长度的增加而快速增大,使用反馈控制信号,控制编码信号的码长;引入冗余信息处理程序,剔除编码信号中冗余,提高译码效率;建立度邻接信号表的位置系数储存机制,合理利用DSP芯片片上内存资源。LT codes is an efficient rateless codes. The TMS320VC5416 is used to design and realize the eucoder and decoder of LT codes in this paper. As the computational burden and memory usage of the encoder and decoder increase rapidly with the encoding length ,feedback control signal,redundancy process and positional coefficient storage mechanism is introduced. The feedback control signal controles the length of code signals. The redundancy process can remove the redundancies of code signals ,which can result in the efficiency growth of decoding process. Positional coefficient storage mecha- nism of neighbors＇ list of the encoding symbol make the memory resources of DSP chip rationally utilized.

关 键 词：LT码 反馈控制信号 冗余信息处理 位置系数储存机制 

分 类 号：TN911[电子电信—通信与信息系统]