Lempel-Ziv Encoding

1
Lempel-Ziv Encoding
2
Compress
0
1
3
3
2
4
8

• ABABABCBABABABCBABABABCBA
• Loop buffer c sent stored new
  buffer

1
A
B
0
AB (3)
B
2
B
A
1
BA (4)
A
AB
3
A
B
3
ABA (5)
A
A
4
AB
B
AB
5
A
3
ABC(6)
C
C
6
AB
2
CB(7)
B
B
7
C
BA
A
8
B
4
BAB(8)
B
B
9
BA
A
BA
10
B
BAB
B
11
BA
8
BABA(9)
A
A
12
BAB
A
B
C
0
1
2
3
Compress
6
9
8

• ABABABCBABABABCBABABABCBA
• Loop buffer c sent stored new
  buffer

13
A
B
AB
14
AB
C
ABC
15
ABC
B
6
ABCB(10)
B
16
B
A
BA
17
BA
B
BAB
18
BAB
A
BABA
19
BABA
B
9
BABAB(11)
B
20
B
A
BA
21
BA
B
BAB
22
BAB
C
BABC(12)
8
C
4
Uncompress
0 1 3 3 2 4 8 6 9 8 7 0

• Loop Prior current in table
  c tmp/code printed

1
0 (A)
1 (B)
Y
B
AB/3
B
2
1 (B)
3 (AB)
Y
A
BA/4
AB
3
3 (AB)
3 (AB)
Y
A
ABA/5
AB
4
3 (AB)
2 (C)
Y
C
ABC/6
C
5
2 (C)
4 (BA)
Y
B
CB/7
BA
6
4 (BA)
8
N
B
BAB/8
BAB
7
8 (BAB)
6 (ABC)
Y
A
BABA/9
ABC
8
6 (ABC)
9 (BABA)
Y
B
ABCB/10
BABA
9
9 (BABA)
8 (BAB)
Y
B
BABAB/11
BAB
A
B
C
0
1
2