background image
ISO/IEC 10918-1 : 1993(E)
7
0
7 6 5 4
0
3
61
62
63
3
4
5
1
2
0
1
2
63
62
MSB
TISO1570-93/d095
0
0
1
62
63
1
2
7 6
1 0
MSB LSB
Blocks
Sending
Sending
DCT
coefficients
a) Image component
a)
as quantized
a)
DCT coefficients
b) Sequential encoding
1st scan
1st scan
Sending
2nd scan
2nd scan
Sending
Sending
3rd scan
3rd scan
Sending
Sending
Sending
nth scan
6th scan
(LSB)
c) Progressive encoding
a)
Spectral selection
d) Progressive encoding
a)
Successive approximation
Figure G.1 Spectral selection and successive approximation progressive processes
120
CCITT Rec. T.81 (1992 E)
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