SPIHT Coding Example: Pass 1, Sorting Step (3)

0 1 2 3 4 5 6 7

0

1

2

3

4

5

6

7

S = (0,0), (0,1), (1,0), (1,1),

(0,2), (0,3), (1,2), (1,3)

Z = (R,1,0), (R,1,1)

Z’ = (RC,0,1)

(R,1,0) is significant

output 1

S = (0,0), (0,1), (1,0), (1,1),

(0,2), (0,3), (1,2), (1,3),

(2,0), (2,1), (3,0), (3,1)

output 1100 for signs of these

Z = (RC,1,0), (R,1,1)

Z’ = (RC,0,1)

became significant

in S

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