background image
ISO/IEC 10918-1 : 1993(E)
K.3.1
Typical Huffman tables for the DC coefficient differences
Tables K.3 and K.4 give Huffman tables for the DC coefficient differences which have been developed from the average
statistics of a large set of video images with 8-bit precision. Table K.3 is appropriate for luminance components and Table
K.4 is appropriate for chrominance components. Although there are no default tables, these tables may prove to be useful
for many applications.
Table K.3 Table for luminance DC coefficient differences
Category
Code length
Code word
1
0
2
00
0
1
1
3
010
1
2
3
011
1
3
3
100
1
4
3
101
1
5
3
110
1
6
4
1110
1
7
5
11110
1
8
6
111110
1
9
7
1111110
10
8
11111110
11
9
111111110
Table K.4 Table for chrominance DC coefficient differences
Category
Code length
Code word
1
0
1
2
00
0
1
1
1
2
01
1
2
1
2
10
1
3
1
3
110
1
4
1
4
1110
1
5
1
5
11110
1
6
1
6
111110
1
7
1
7
1111110
1
8
1
8
11111110
1
9
1
9
111111110
10
10
1111111110
11
11
11111111110
K.3.2
Typical Huffman tables for the AC coefficients
Tables K.5 and K.6 give Huffman tables for the AC coefficients which have been developed from the average statistics of
a large set of images with 8-bit precision. Table K.5 is appropriate for luminance components and Table K.6 is appropriate
for chrominance components. Although there are no default tables, these tables may prove to be useful for many
applications.
CCITT Rec. T.81 (1992 E)
149
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