Freescale Semiconductor, Inc.
Table 4. A–Law Encode–Decode Characteristics
Normalized
Digital Code
Encode
Normalized
Decode
Levels
1
2
3
4
5
6
7
8
Chord
Number
Number
of Steps
Step
Size
Decision
Levels
Sign
Chord Chord Chord Step
Step Step
Step
4096
3968
1
1
1
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
1
0
0
1
1
0
0
0
1
0
1
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
4032
7
16
128
…
…
…
2176
2112
2048
…
…
…
6
5
4
3
2
16
16
16
16
16
32
64
32
16
8
1088
1056
1024
…
…
…
544
528
512
272
256
136
128
68
264
132
66
4
64
1
2
2
1
0
NOTES:
1. Characteristics are symmetrical about analog zero with sign bit = 0 for negative analog values.
2. Digital code includes inversion of all even numbered bits.
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