说明：  给出了由(2 ,1 ,N) 系列卷积码作为母码产生的punctured 卷积码的编码及其Viterbi 译码的 软件实现方法,从而为各种不同码率的卷积码的编、译码给出了一种通用的实现方法,并且为多级 编码分量码的设计提供了条件
(Is given by (2, 1, N) family of convolutional codes as the code generated by the mother Punctured convolutional codes of coding and Viterbi decoding software implementation methods for various bit-rate allocation of the convolutional code, decoding is given the realization of a universal method for encoding multi-level component design code provided the conditions)