H.261 Datasheet, PDF (15/31 Pages) List of Unclassifed Manufacturers – LINE TRANSMISSION OF NON-TELEPHONE SIGNALS

MBA
11
12
13
14
15
16
17
18
19
10
11
12
13
14
15
16
Code
1
011
010
0011
0010
0001 1
0001 0
0000 111
0000 110
0000 1011
0000 1010
0000 1001
0000 1000
0000 0111
0000 0110
0000 0101 11
TABLE 1/H.261
VLC table for macroblock addressing
MBA
Code
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
MBA stuffing
Start code
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0101
0101
0101
0100
0100
0100
0100
0100
0100
0011
0011
0011
0011
0011
0011
0011
0011
0001
0000
10
01
00
11
10
011
010
001
000
111
110
101
100
011
010
001
000
111
0000
0001
4.2.3.2 Type information (MTYPE) (Variable length)
Variable length codewords giving information about the macroblock and which data elements are present. Macroblock types,
included elements and VLC words are listed in Table 2.
MTYPE is always included in transmitted macroblocks.
4.2.3.3 Quantizer (MQUANT) (5 bits)
MQUANT is present only if so indicated by MTYPE.
A codeword of 5 bits signifying the quantizer to be used for this and any following blocks in the group of blocks until
overridden by any subsequent MQUANT.
Codewords for MQUANT are the same as for GQUANT.
12
Recommendation H.261 (03/93)