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1 根据采样频率计算数据率或数据量等，书上和PPT上都有题目。 至于色彩空间的计算很简单，只要理解了图象的基本原理，就可以计算出来，只需复习我复习课上所提到过的概念2 书上的题目只是一个类似的求解题目，

2. 步骤 位置 词典 输出码字 前缀P (1)a (2)b (3)c 1 (4)ab (1) P=a 2 (5)ba (2) P=b 3 (6)abc (4) P=ab 4 (7)cb (3) P=c

谢谢～