decoding theory meaning in English
译码理论
Examples
- It also discusses the code and decode theory for rs error - correcting codes , then summarizing the design and debug experience for the rs ( 31 , 15 ) coder and decoder through fpga
文章中还讨论了rs纠错码的编译码原理和算法,总结了基于fpga实现一个rs ( 31 , 15 )编码和译码器的设计经验和调试经验。 - Turbo codes represent the new code structures , which consist of pccc ( parallel serially convolutional code ) and sccc ( serially concatenated convolutional code ) . in this paper , the background of turbo codes are firstly introduced , which includes the base principle of error correction code 、 block code and convolutional code ; the principle of turbo code and the iterative decoding is secondly expanded ; the key decoding algorithm : a revised map algorithm and iterative decoding theory are detailed ; then , a new turbo code structure : hccc ( hybrid concatenated convolutional code ) is presented , and the capacity of this code method is analyzed , the average capacity upper bound is derived ; at last , this code is simulated on awgn ( additive white gaussian noise ) channel and rayleigh fading channel
本文首先介绍了turbo码的背景知识，包括差错控制的基本原理、分组码和卷积码；然后阐述了turbo码的基本原理，包括turbo编译码器结构及迭代译码原理；较为详细地描述了关键的译码算法： ?种改进的最大后验概率( map )译码算法及迭代译码算法；提出了一种新的turbo码结构：混合turbo码(混合级联卷积码) ；并用编码性能联合界分析方法对混合turbo码进行了性能分析，得出了其平均性能上界；并在高斯白噪声信道和瑞利衰落信道上分别作了一些应用研究及计算机仿真实验。 - Firstly , this thesis reviews the evolution of image coding / decoding theory , summarizes the technology framework of several image / video coding / decoding standards , designs a contrasting research to these standards , interoperates the origin of the h . 264 ' s advantages , and investigates the principal structure and the key modules of h . 264 , as establishing necessary theory basis for the practical application
首先,本文回顾了图像编解码理论的发展历程,总结了多种静态图像和视频的编解码标准的技术框架,对各种标准进行了比较研究,然后分析了h . 264的优势来源,接着研究了h . 264的主体结构和关键模块,为实际应用奠定了必要的理论基础。 - The task is based on st ’ s sdtv channel decoder solution with a highly integrated single - chip fully digital qam demodulation stv0297 . chapter 1 introduced the interrelated background of this item ; chapter 2 introduced the coding and decoding theory about channel ; chapter 3 described the hardware structure , the function , the realizing principle and the method of the pcb design ; the scheme and flow chart of software design are also described in detail in chapter 4 ; chapter 5 described the testing and analyzed the result ; at last , chapter 6 presented the summing - up of this dissertation
第一章介绍了本项目的相关背景知识;第二章简单描述了信道编解码原理;第三章系统地介绍了标准清晰度数字电视机顶盒信道解码器的硬件构成、功能和实现原理,并介绍了电路板的设计方法;第四章对信道解码的软件设计方案和实现流程也做了比较详细的阐述;第五章给出了测试结果并对其进行了分析;第六章对本论文进行了总结。 - The forth chapter focus on the researches of decoding algorithm , first studies the decoding theory and decoding approaches of several iterative message passing algorithms for ldpc code , because of the conflict between simplification and reduced performance of bp decoding algorithm , the thesis analyzes the calculation complexity of each algorithm , and simulates the performance of each algorithm , by considering the tradeoff between hardware complexity and error performance , we get two algorithms which are much easier to implement : bp - based and normalized bp - based decoding algorithm , especially , the last one achieves considerable improvement with almost the same complexity
第四章对ldpc码译码算法进行了深入研究,给出了基于置信传播的几种译码算法的原理和步骤,围绕着bp算法的简化与译码性能下降的矛盾,研究了每一种译码算法的复杂度分析,并相应地给出了每一种译码算法的仿真性能曲线,综合考虑译码性能和译码复杂度两个方面,从而得出了适合硬件实现的算法: bp - based和normalizedbp - based算法,后者在基本不增加译码复杂度的情况下,对译码性能有较大的提高。