idx.m

该程序实现了A律13折线量化编码过程。包括两种译码方法：1手工译码法

function y=Idx(u)
predictor=[0 1];
partition=[-124 -120 -116 -112 -108 -104 -100 -96 -92 -88 -84 -80 -76 -72 -68 -64 -62 -60 -58 -56 -54 -52 -50 -48 -46 -44 -42 -40 -38 -36 -34 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15.5 -15 -14.5 -14 -13.5 -13 -12.5 -12 -11.5 -11 -10.5 -10 -9.5 -9 -8.5 -8 -7.75 -7.5 -7.25 -7 -6.75 -6.5 -6.25 -6 -5.75 -5.5 -5.25 -5 -4.75 -4.5 -4.25 -4 -3.875 -3.75 -3.625 -3.5 -3.375 -3.25 -3.125 -3 -2.875 -2.75 -2.625 -2.5 -2.375 -2.25 -2.125 -2 -1.9375 -1.875 -1.8125 -1.75 -1.6875 -1.625 -1.5625 -1.5 -1.4375 -1.375 -1.3125 -1.25 -1.1875 -1.125 -1.0625 -1 -.9375 -.875 -.8125 -.75 -.6875 -.625 -.5625 -.5 -.4375 -.375 -.3125 -.25 -.1875 -.125 -.0625 0 .0625 .125 .1875 .25 .3125 .375 .4375 .5 .5625 .625 .6875 .75 .8125 .875 .9375 1 1.0625 1.125 1.1875 1.25 1.3125 1.375 1.4375 1.5 1.5625 1.625 1.6875 1.75 1.8125 1.875 1.937 2 2.125 2.25 2.375 2.5 2.625 2.75 2.875 3 3.125 3.25 3.375 3.5 3.625 3.75 3.875 4 4.25 4.5 4.75 5 5.25 5.5 5.75 6 6.25 6.5 6.75 7 7.25 7.5 7.75 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 68 72 76 80 84 88 92 96 100 104 108 112 116 120 124];
codebook=[-126 -122 -118 -114 -110 -106 -102 -98 -94 -90 -86 -82 -78 -74 -70 -66 -63 -61 -59 -57 -55 -53 -51 -49 -47 -45 -43 -41 -39 -37 -35 -33 -31.5 -30.5 -29.5 -28.5 -27.5 -26.5 -25.5 -24.5 -23.5 -22.5 -21.5 -20.5 -19.5 -18.5 -17.5 -16.5 -15.75 -15.25 -14.75 -14.25 -13.75 -13.25 -12.75 -12.25 -11.75 -11.25 -10.75 -10.25 -9.75 -9.25 -8.75 -8.25 -7.875 -7.625 -7.375 -7.125 -6.875 -6.625 -6.375 -6.125 -5.875 -5.625 -5.375 -5.125 -4.875 -4.625 -4.375 -4.125 -3.9375 -3.8125 -3.6875 -3.5625 -3.4375 -3.3125 -3.1875 -3.0625 -2.9375 -2.8125 -2.6875 -2.5625 -2.4375 -2.3125 -2.1875 -2.0625 -1.96875 -1.90625 -1.84375 -1.78125 -1.71875 -1.65625 -1.59375 -1.53125 -1.46875 -1.40625 -1.34375 -1.28125 -1.21875 -1.15625 -1.09375 -1.03125 -.96875 -.90625 -.84375 -.78125 -.71875 -.65625 -.59375 -.53125 -.46875 -.40625 -.34375 -.28125 -.21875 -.15625 -.09375 -.03125 .03125 .09375 .15625 .21875 .28125 .34375 .40625 .46875 .53125 .59375 .65625 .71875 .78125 .84375 .90625 .96875 1.03125 1.09375 1.15625 1.21875 1.28125 1.34375 1.40625 1.46875 1.53125 1.59375 1.65625 1.71875 1.78125 1.84375 1.90625 1.96875 2.0625 2.1875 2.3125 2.4375 2.5625 2.6875 2.8125 2.9375 3.0625 3.1875 3.3125 3.4375 3.5625 3.6875 3.8125 3.9375 4.125 4.375 4.625 4.875 5.125 5.375 5.625 5.875 6.125 6.375 6.625 6.875 7.125 7.375 7.625 7.875 8.25 8.75 9.25 9.75 10.25 10.75 11.25 11.75 12.25 12.75 13.25 13.75 14.25 14.75 15.25 15.75 16.5 17.5 18.5 19.5 20.5 21.5 22.5 23.5 24.5 25.5 26.5 27.5 28.5 29.5 30.5 31.5 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 66 70 74 78 82 86 90 94 98 102 106 110 114 118 122 126];
y=dpcmenco(u,codebook,partition,predictor);