针对实际应用中待压缩数据可能来自不同的符号集 ,提出了一种新的算术编码方案。该方案在提高编码效率的同时 ,增强了抗误码扩散能力 ,而且可以根据系统的要求在不损失编码效率的同时实现加密功能。性能分析表明 ,该算法编码效率比一般单一进制的算术编码提高 10 %左右 For the practical application of data to be compressed may come from different symbol sets, a new arithmetic coding scheme is proposed. This scheme enhances the coding efficiency while enhancing the ability to resist error diffusion, and can realize the encryption function according to the requirements of the system without losing the coding efficiency. Performance analysis shows that the coding efficiency of this algorithm is about 10% higher than that of the general unary arithmetic coding