ISO/IEC 10918-1 : 1993(E)
TISO1670-93/d105
CodeSA_ZZ(K)
T = LSB ZZ(K)
Yes
No
| ZZ(K) | > 1
?
Code_1(S0)
T = 1
?
Yes
No
ZZ(K) > 0
?
No
Yes
Code_0(SC)
Code_1(SC)
Code_1(SS)
Code_0(SS)
Done
Figure G.11 ­ Coding non-zero coefficients for subsequent successive approximation scans
Figure G.11 [D105] = 11 cm = 430 %
Table G.2 ­ Statistical model for subsequent scans of successive
approximation coding of AC coefficient
Context-index
AC coding
Coding decision
SE
3
×
(K­1)
K
=
EOB
S0
SE
+
1
V
=
0
SS
Fixed estimate
Sign
SC
S0
+
1
LSB ZZ(K)
=
1
CCITT Rec. T.81 (1992 E)
131
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