论文标题:DVD伺服芯片中Reed-Solomon码解码器的研究与FPGA实现
Research and FPGA Implementation of Reed-Solomon Code in DVD Servo Chip
论文作者 邓广来
论文导师 庞福文,论文学位 硕士,论文专业 通信与信息系统
论文单位 大连海事大学,点击次数 124,论文页数 57页File Size2278k
2005-03-01论文网 http://www.lw23.com/lunwen_21282812/ Reed-Solomon解码;FPGA; DVD伺服;修正欧几里算法
Reed-Solomon decoding ; FPGA; DVD servo ; Modified Euclid algorithm
Reed-Solomon码(简称RS码)是一种具有很强的纠正突发和随机错误能力的信道编码方式,在深空通信、移动通信、磁盘阵列、光盘存储以及数字视频广播(DVB)等系统中具有广泛的应用。本文讨论了利用修正欧几里算法(Modified Euclid Algorithm)设计的RS(208,196)信道解码电路,并且进行了FPGA验证。 DVD是一种高容量的存储媒质。DVD技术的应用很广泛,从娱乐领域到计算机应用领域。DVD技术在数字技术中占有重要地位。一个成熟的DVD产品一定包括两个主要的芯片:伺服芯片和解码芯片。解码芯片主要完成MPEG-Ⅱ的信源解码;伺服芯片主要完成光信号到电信号再到信源码的转变。伺服芯片是很复杂的,包括模拟电路设计(Analog)、数字电路设计(Digital)和韧体设计(Firmware)。Reed-Solomon码解码器在数字部分中占有重要部分。 FPGA(Field Programmable Gate Array)即现场可编程门阵列是在PAL、GAL、EPLD等可编程器件的基础上进一步发展的产物,它是作为专用集成电路(ASIC)领域中的一种半定制电路而出现的,即解决了定制电路的缺陷,又弥补了原有可编程器件门电路不足的缺点。FPGA在IC设计中的重要地位是它所能提供的硬件验证功能。 本文所做的Reed-Solomon解码器在伺服芯片中数字部分的重要模块。本文在介绍了Reed-Solomon码必要的数学基础后,对Reed-Solomon解码的理论和算法做了详细的阐述,随后详细说明了Reed-Solomon解码器的FPGA实现和验证。
Reed-Solomon codes are error correcting codes with wide range of applications in digital communications and storage. The systems using Reed-Solomon codes include: storage device (including tape, compact disk, DVD, barcode, etc), wireless communication system, DVB (Digital Video Broadcast), high speed modem such as ADSL and xDSL.DVD is an optical storage medium with large capacity. The DVD technology has wide range of applications from entertainment to computer applications. DVD technology plays an important role in digital technology. One complete DVD product must have two main chips: servo chip and MPEG-II decoding chip. The function of MPEG-II decoding chip is to decode the MPEG-II encoded data. The function of servo chip is to transform the optical signal to electrical signal and then to the MPEG-II encoded data. The servo chip is complex. It includes three parts: analog, digital and firmware. Reed-Solomon decoder plays an important role in the digital parts.FPGA(Field Programmable Gate Array) is the result based on PAL, GAL and EPLD. It is used as a semi-customized circuit. It solves both the default of the customized circuit and the limit of gate in the original programmable device. The role of FPGA in IC design is to provide hardware verification of IC function.The Reed-Solomon decoder is an important module in whole servo chip. After introducing the mathematic fundament of Reed-Solomon code, Reed-Solomon decoding theory and algorithm are explained. Then illuminate the implementation and verification of FPGA.
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