一种N/(N+1)型高码率游长受限码编码方法

The N/(N+1) encoding scheme of high rate runlength limited codes

基于数据分块的分布特性,提出了一种可用于磁存储或光存储读写通道中的高码率游长受限码的编码方法,包括对数据进行子块分割和检测、建立标志子块队列,按照排队规则和无冲突子块的映射策略进行码字映射等.该方法能在给定的(d,k)受限条件下接近编码容量,并具有递推设计更高码率编码的扩展性能.利用该方法设计了码率为32/33(d=0,k=6)的游长受限码,并给出了结合子块交叉插入技巧设计64/65(0,10)游长受限码的方法,还对受限参数与码率和编码容量的关系进行了探讨.

A high rate runlength limited coding scheme for magnetic recording channel or optical recording channel was proposed based on the distributing characteristic of data source.The coding scheme included splitting the source data into sub-blocks,testing and constructing the indicating block queue,then mapping code words according to the queuing rules and the mapping strategy of un-conflicting sub-blocks.The coding scheme could approach the maximum rate runlength limited(RLL) codes rate within the limits of spec...