第二章信源及信源熵 (P36-2133 417 (3P1=2 7 2 (3H(x=6Log36+15L 4337 4 H(=o0+21030)+3e2)+4 362)+3613)+324+33 Lo =3.274 =0014 100 =6644 9+m01100=0 (3 Log(4 25%75% %0.375-1080375=1415 2-4 ELog 8 +7Log(4)+log(4+ Iog(8)=1.906 601906=114.36 25(12(21)共两种1o(2)=47 (16(610(25)(5234(43)共六种1o16 2.585 2-6014个1--13个2--12个3--6个 14/,13,、12 8111(1=87811 2-7Log(2)=1Iog(4)=2Log(8)=3 2-8“一”用三个脉冲“●”用一个脉冲 (1)I(●)=Log(4=2I(一 0415第二章 信源及信源熵 2-1 (4) 2-2 2-3 2-4 3 8 Log 8 3       1 4 + Log(4) 1 4 + Log(4) 1 8 + Log(8) = 1.906 601.906 = 114.36 2-5 (1,2) (2,1) 共两种 Log 36 2       = 4.17 (1,6) (6,1) (2,5) (5,2) (3,4) (4,3) 共六种 Log 36 6       = 2.585 2-6 0—14 个 1---13 个 2----12 个 3---6 个 P= I= 2-7 Log(2) = 1 Log(4) = 2 Log(8) = 3 2-8 “－” 用三个脉冲 “●”用一个脉冲 (1) I(●)= Log(4) = 2 I(－)＝Log 4 3       = 0.415