CoursInformatique/Images/FF.txt

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2019-12-12 22:25:13 +01:00
42 4d de 00 00 00 00 00 00 00 36 00 00 00 28 00
00 00 07 00 00 00 07 00 00 00 01 00 18 00 00 00
00 00 a8 00 00 00 13 0b 00 00 13 0b 00 00 00 00
00 00 00 00 00 00 00 ff 00 00 87 00 ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff 00 00 00 00 ff
00 00 87 00 ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff 00 00 00 00 ff 00 00 87 00 00 87 00 ff
ff ff ff ff ff ff ff ff ff ff ff 00 00 00 00 ff
00 00 ff 00 00 ff 00 00 ff 00 ff ff ff ff ff ff
ff ff ff 00 00 00 00 ff 00 00 87 00 ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff 00 00 00 00 ff
00 00 87 00 00 87 00 00 87 00 00 87 00 00 87 00
ff ff ff 00 00 00 00 ff 00 00 ff 00 00 ff 00 00
ff 00 00 ff 00 00 ff 00 00 ff 00 00 00 00
Lettre Fréq Codage Nb bits
4 2 11111110 8x2=16
2 2 1111110 7x2=14
d 1 111111110 9x1=9
e 1 1111111110 10x1=10
0 226 0 1x226=226
3 2 111110 6x2=12
6 1 11111111110 11x1=11
8 13 110 3x13=39
7 12 1110 4x12=48
1 3 11110 5x3=15
a 1 111111111110 12x1=12
b 1 1111111111110 13x1=13
f 170 10 2x170=340
Soit 16+14+...=765 bits
Au lieu de :
16x14-2=222 octets
soit 222x8=1776 bits
11111110|1111110|11111110|111111110 ...
Gain : 57%
Sans l'arbre de Huffmann