The entropy coding methods which adopted fixed code table and probability model are improved to adaptive context-based alterable word length coding. 熵编码由固定的码表和概率模型改进为自适应的基于上下文的变字长编码。
Meanwhile, the paper analyses principles of the word length chosen in the view of multilevel fixed points. A algorithm based on word length control on the basis of digit AGC is introduced, which simulation shows the precision of. 分析了多级定点处理字长选取原则,给出一种基于数字AGC的定点字长控制算法,仿真表明算法能够准确实现截短位控制。