算术编码是图像压缩的主要算法之一。　在给定符号集和符号概率的情况下，算术编码可以给出接近最优的编码结果。使用算术编码的压缩算法通常先要对输入符号的概率进行估计，然后再编码。这个估计越准，编码结果就越接近最优的结果-Arithmetic coding algorithm was a major one compressed image. In a given symbol set and symbol probability case, arithmetic coding can give near optimal coding results. Arithmetic coding compression algorithm used is usually first on the probability of input symbol estimates, and then encoding. This estimate is more accurate, the closer the results of the optimal coding results