Rs Codecs Based Dvd Applications And Fpga

Error-correcting codes technology is a effective way to improve the reliability of information transmission by increasing certain redundant information. RS code is a kind of typical error-correcting codes. Among linear block codes, it has the strongest correcting capability, which can correct bursting and random errors. It is widely applied in deep space communications,mobile communications,RAID, optical storage and digital video broadcasting (DVB) system.DVD is a high-capacity storage medium.Application of DVD technology is very extensive, which occupies an important position in digital technology. The DVD system correct errors on Reed-Solomon product code (RS-PC: Reed-Solomon Product Code). RS decoder plays an important role in servo chip.FPGA has irreplaceable advantages including safe, convenient and improvable at any time in development stage.FPGA can greatly enhance the flexibility, reliability of hardware system,improve the speed and reduce the cost in electronic hardware system. FPGA's inherent advantages can be more widely applied. FPGA design technology is also available to more designers.This paper introduced code theory and the common RS codec algorithm, the implementation of RS encoder, then detailedly analyse the decoder realization of BM algorithm and ME algorithm, then bring forward implementation and improvement of a pipeline structure errors and erasures correcting RS decoder on ME algorithm, compromise the decoder complexity and delay to reduce the complexity and raise the maximum operating frequency. Finite-field multipliers optimize codec circuit. The adoption of these technologies has greatly improved the efficiency of the RS encoder and decoder, and saved on the resources. RS(208, 192) encoder/decoder was implemented on Virtex-II FPGA of Xilinx company.