SONY DSR—30P DVCAM录像机

１　磁带本录像机使用标准ＤＶＣＡＭ或Ｍｉｎｉ－ＤＶＣＡＭ磁带。２　菜单设置·按ＭＥＮＵ（菜单）键,再按ＣＵＲＳＯＲ（光标）的↑／↓键,选定ＳＥＴＵＰＭＥＮＵ（菜单设置）后,按ＥＸ－ＥＣＵＴＥ（执行）键,进入菜单设置：（１）Ｌ１ＩＮＶＩＤＥＯ（１路输入视频）·Ｓ当Ｓ端和复合端都接有信号时,若要选择Ｓ视频信号,则设置到Ｓ的位置。若只有复合端接有信号,则自动选择复合视频。·ＮＯＲＭ当Ｓ端和复合端都接有信号时,若要用复合视频信号,则选择ＮＯＲＭ项。（２）ＡＵＤＩＯＭＯＤＥ（音频模式）·１６当设置到１６时…     

RS码在HDTV信号传输中的应用

将纠随机错误和突发错误的ＲＳ码应用于ＨＤＴＶ信道传输中，以ＲＳ码结合交错码来提高信道传输体制的纠错能力，提出了ＲＳ码的编码方案，译码方案及交错方案。从计算机模拟的结果可以看出：采用ＲＳ码可使信道传输的误码率从１０＾－５降至１０＾－８。若将ＲＳ码一ＴＣＭ码级联，可进一步提高整个系统的编码增益，使得编码增益比无编码前增加３ｄｂ－５ｄｂ。     

网络操作系统（下）

网络操作系统（下）张保栋六、Ｎｅｔｗａｒｅ的结构Ｎｅｔｗａｒｅ的核心处于文件ＳＥＲＶＥＲ．ＥＸＥ中。为了加载ＮＯＳ，你可从ＤＯＳ上运行这个程序。我们知道，重要文件都保存在硬盘的ＤＯＳ分区中。服务器程序从ＤＯＳ上运行之后，Ｎｅｔｗａｒｅ便将处理器从实时...     

数字录像机的纠错技术（上）──数字录像机中的里德－索洛蒙码

误码校验是支撑ＤＶＴＲ实用化的技术之一。目前各类型ＤＶＴＲ均采用ＲＳ码。ＲＳ码基于本原多项式的根之扩大体按ＧＦ（２￣ｍ）运算规则构成。本文分两讲，分别讲述一般ＲＳ码、ＤＶＴＲ用ＲＳ码的生成、纠错原理及其编、解码器的构成。     

数字视频广播卫星传送标准中的RS码

在数字卫星电视信号传送中的ＦＥＣ中,常采用ＲＳ码,讨论了ＲＳ码的三个问题;１）伽罗华域ＧＦ（２＾８）;２）ＲＳ的码的编码;３）ＲＳ码的检错和纠错。     

1微米硅栅CMOSASIC制造中RIE的应用

本文主要介绍１ｕｍ双阱双层金属布线硅栅ＣＭＯＳ专用集成电路制造中采用先进的反应离子刻蚀技术，对多种材料如ＬＰＣＶＤ、Ｓｉ３Ｎ４、ＰＥＣＶＥＳｉ３Ｎ４、热ＳｉＯ２、ＰＥＶＥＤＳｉＯ２、ＰＳＧ、ＢＰＳＧ、多晶硅和Ａｌ－Ｓｉ（１．０％）－Ｃｕ（０．５％）合金等进行高选择比的，各向异性刻蚀的工艺条件及其结果。获得上述各种材料刻蚀后临界尺寸（ＣＤ）总损失＜０．０８ｕｍ的优良结果。此外还分析讨论了被选择的刻蚀     

一种基于SOVA的改进的Turbo码译码方案

本文在研究Ｔｕｒｂｏ 码反向ＳＯＶＡ（Ｓｏｆｔ－Ｏｕｔｐｕｔ ＶｉｔｅｒｂｉＡｌｇｏｒｉｔｈｍ ）译码性能的基础上,提出了一种同时利用正向和反向ＳＯＶＡ译码软输出信息的基于ＳＯＶＡ 的改进译码结构及其相应的软输出修正公式。计算机模拟结果表明,所提出的改进方案与传统的ＳＯＶＡ算法相比,其译码性能有明显的改善,并略优于Ｍａｘ－Ｌｏｇ－ＭＡＰ的性能     

几何广义RS码的译码

本文给出了几何广义ＲＳ码的一种有效译码算法，该算法可对任意错误个数不超过「（ｄ－１）／２」的接收码字进行译码，其复杂度仅为Ｏ（ｎ＾３）。     

RS码编码和译码的算法

本文针对用ＤＳＰ芯片实现ＲＳ码的编码器和译码器的要求,讨论ＲＳ码的编码和译码算法。     

西门子S4手机功能介绍

西门子Ｓ４手机功能介绍西门子Ｓ４手机有９大菜单功能，而在每一个主菜单下又有若干个可供选择的分菜单，分述如下。１．ＲＩＮＧＥＲ振铃１ＲＩＮＧＥＲ振铃声；２ＶＯＬＵＭＥ音量；３ＴＯＮＥ铃音调。２．ＤＩＶＥＲＴ转移１ＩｆｎｏｔＲｅａｃｈａｂｌｅ用户不在服务...     

RS regenerating codes for cloud storage fault-tolerant system

RS(Reed-Solomon) regenerating erasure codes was proposed for cloud storage fault-tolerant system,which not only inherited the reliability of the RS encoding,but also achieved the high efficiency of tolerance three faults.Hybrid recovery method of the single fault node based on RS regenerating erasure codes was introduced.And the theoretical lower bound of the number of accessing disks was computed.In theory,the performance evaluation of the storage overhead,decoding efficiency,and repair bandwidth of the RS regenerating erasure codes was carried out.Experiments results show that the repair performance of RS regenerating erasure codes is improved greatly than the similar erasure codes,and the total recovery time of the system is reduced by 20.8%~28.2% using hybrid recovery algorithm in the case of single fault.     

一种新的缩短RS码迭代译码方案

为了在EPON中应用GF(256)标准RS码对信息帧长大于255位的信息流进行编码,并提高RS码的编码增益,提出了一种新的缩短RS码的编译码方案。该方案通过两个缩短RS码的交叠编码和互相迭代译码,可以提高编译码增益。RS码BM硬判决译码和chase软判决译码的计算机仿真表明,该方案对缩短RS码的软硬判决译码性能都有明显提高。     

Reduction of PAPR in coded OFDM using fast Reed-Solomon codes over prime Galois fields

In this work, two new techniques using Reed–Solomon (RS) codes over GF(257) and GF(65,537) are proposed for peak-to-average power ratio (PAPR) reduction in coded orthogonal frequency division multiplexing (OFDM) systems. The lengths of these codes are well-matched to the length of OFDM frames. Over these fields, the block lengths of codes are powers of two and we fully exploit the radix-2 fast Fourier transform algorithms. Multiplications and additions are simple modulus operations. These codes provide desirable randomness with a small perturbation in information symbols that is essential for generation of different statistically independent candidates. Our simulations show that the PAPR reduction ability of RS codes is the same as that of conventional selected mapping (SLM), but contrary to SLM, we can get error correction capability. Also for the second proposed technique, the transmission of side information is not needed. To the best of our knowledge, this is the first work using RS codes for PAPR reduction in single-input single-output systems.     

编织码编码原理及其分类

编织码 ( Woven码 )是一类包容性极强的新型高效纠错码 ,它是在级联码的基础上形成的 ,其编码结构具有把各类成员码按编织状组合编码的特点且其性能优于传统的 Turbo码。本文在简要阐述编织码的三种基本编码原理基础上对外经结构的不同编码方案构成的编织码做了简单的分类 ,这对优化设计和分析编织码性能具有积极推动作用。     

Improved FEC Code Based on Concatenated Code for Optical Transmission Systems

The improved three novel schemes of the super forward error correction(super-FEC) concatenated codes are proposed after the development trend of long-haul optical transmission systems and the defects of the existing FEC codes have been analyzed. The performance simulation of the Reed-Solomon(RS)+Bose-Chaudhuri-Hocguenghem(BCH) inner-outer serial concatenated code is implemented and the conceptions of encoding/decoding the parallel-concatenated code are presented. Furthermore, the simulation results for the RS(255,239)+RS(255,239) code and the RS(255,239)+RS(255,223) code show that the two consecutive concatenated codes are a superior coding scheme with such advantages as the better error correction, moderate redundancy and easy realization compared to the classic RS(255,239) code and other codes, and their signal to noise ratio gains are respectively 2～3dB more than that of the RS(255,239)code at the bit error rate of 1×10 -13 . Finally, the frame structure of the novel consecutive concatenated code is arranged to lay a firm foundation in designing its hardware.     

On the performance and complexity of A generalized minimum distance reed–solomon decoding algorithm

The article reports on the characteristics of an algorithm that implements generalized minimum distance (GMD) decoding of Reed-Solomon codes. The algorithm uses the novel Welch-Berlekamp (WB) algorithm, as modified by Tze-Hua, in order to minimize the complexity of the decoder. Both the WB algorithm and the GMD extension of the WB algorithm are described in outline. The performance of the GMD algorithm was simulated on AWGN channels and fading channels. Results are presented both for RS and concatenated RS codes. The gains over conventional decoding are larger for fading channels than for AWGN conditions but seem useful in all cases. The complexities of the GMD algorithm and the WB algorithm are analysed and compared to that of conventional RS decoding algorithms.     

实现Reed-Solomon码译码的新电路--在普通基上用"比特串行乘法电路"实现RS码译码

本文推出了在域GF(2m)上用于RS码译码的两种新电路:普通基"比特串行序列乘法电路"和"比特串行乘法累加电路",基本上以m个与门代替了两个任意元素相乘的复杂乘法器,使译码电路大大简化.作为一个应用实例,详细阐明了用它们构造的RS码纠删/纠错译码各步电路.这两种新电路对性能优良的RS码的使用和推广具有实用价值.     

一种基于MDS-卷积码的LDPC码构造方法

近年来,结构化低密度奇偶校验(LDPC)码的构造方法受到了广泛地关注.本文提出了一种利用最大距离分割(MDS)编码构造结构化LDPC码的思路.该思路将基于两个信息符号的RS码构造LDPC码的方法扩展至适用于所有的MDS码.本文以具有MDS特性的卷积码为例详细描述该构造方法的细节,并构造了码长从255比特到4095比特的高码率LDPC码.由于卷积码的MDS定义不同于线性分组码,因此本文给出了一种对卷积码截短的方法及其必要的证明.仿真结果表明,本文构造MDS-Conv-LDPC码的性能优于随机构造的LDPC码.     

On endurance and performance of erasure codes in SSD-based storage systems

Erasure codes are widely used in data storage systems to protect against disk failures. Employing erasure codes in an array of Solid-State Drives (SSDs) in storage systems necessitates designers to revisit different characteristics in comparison to Hard Disk Drives (HDDs), due to non-mechanical property of SSDs. One of the most important characteristics of SSDs is their limitation on the number of Program/Erase (P/E) cycles. By taking into account the characteristics of SSDs, this paper presents a comprehensive analysis to investigate the effects of three well-known erasure codes on the endurance and performance of SSD-based disk subsystems. The three erasure codes, i.e., Reed–Solomon, EVENODD, and RDP are implemented on the SSD-extension of DiskSim simulator. The results show that the endurance and performance of Reed–Solomon are on average 90% and 60% higher than other erasure codes, respectively. Additionally, the three erasure codes are compared in terms of different stripe unit sizes, number of disks, and various request sizes. The results show that configuring a disk array with a 4 KB stripe unit size will improve the endurance and performance of EVENODD by 1.8 × and 2.9 ×, respectively, as compared to 128 KB stripe unit size.     

LT码和q-LDPC码级联方案在深空通信中的应用

该文针对深空通信对长纠删码的需求,提出了LT (Luby Transform)码和q-LDPC码的级联方案。在综合考虑性能和复杂度的情况下,选取8-LDPC码和8PSK的级联作为等效的删除信道,长度选择灵活、编译码简单的LT码实现纠删功能。文中设计了两种短8-LDPC码,并对整个级联系统的纠错性能进行了仿真。仿真结果表明8-LDPC码的性能优于信源信息速率和码率相同的二进制LDPC码,级联系统在等效包删除概率不超过0.1时,系统误比特率以概率1趋于0。