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參數(shù)資料
| 型號： | H.261 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | LINE TRANSMISSION OF NON-TELEPHONE SIGNALS |
| 中文描述： | 線傳輸非電話信號 |
| 文件頁數(shù)： | 19/31頁 |
| 文件大?。?/td> | 123K |
| 代理商： | H.261 |
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Recommendation H.261 (03/93)
1
2
6
7
1 5
1 6
2 8
2 9
3
5
8
1 4
1 7
2 7
3 0
4 3
4
9
1 3
1 8
2 6
3 1
4 2
4 4
1 0
1 2
1 9
2 5
3 2
4 1
4 5
5 4
1 1
2 0
2 4
3 3
4 0
4 6
5 3
5 5
2 1
2 3
3 4
3 9
4 7
5 2
5 6
6 1
2 2
3 5
3 8
4 8
5 1
5 7
6 0
6 2
3 6
3 7
4 9
5 0
5 8
5 9
6 3
6 4
T 1 5 1 4 1 0 0 9 3 d 0 7
I n c r e a s i n g c y c e s
p e r p c t u e w d h
F G U R E 1 2 H 2 6 1
T a n m s o n o d o r a n o r m c e c n
I n c r e a s n g c y c e s
p e p c u e h e i g h t
FIGURE 12/H.261...[
D07
] = 6 CM
Codes are given in Table 5.
The most commonly occurring combinations of zero-run and the following value are encoded with variable length codes as
listed in the table 5. End of block (EOB) is in this set. Because CBP indicates those blocks with no coefficient data, EOB
cannot occur as the first coefficient. Hence EOB can be removed from the VLC table for the first coefficient.
The last bit “s” denotes the sign of the level, “0” for positive and “1” for negative.
The remaining combinations of (run, level) are encoded with a 20-bit word consisting of 6 bits escape, 6 bits run and 8 bits
level. Use of this 20-bit word form encoding the combinations listed in the VLC table is not prohibited.
TCOEFF
EOB
FIGURE 11/H.261
Structure of block layer
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