本文是篇硕士论文，在编码器实现过程中，也对解码器进行了一定的研究，所以在文章结尾给出了一个解码器的实现建议。这个实现建议能否应用于实际，还有待进一步的研究。-In this paper, the implementation process of the encoder, the decoder also carried out some research, so in the end of the article gives a decoder implementation recommendations. This proposal can be applied to achieve real, remains to be further studied.