W681513_05 Datasheet, PDF (27/35 Pages) Winbond – 5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS

W681513
10.5.2. A-Law Encode Decode Characteristics
Normalized
Encode
Decision
Levels
4096
3968
:
2048
2048
:
1088
1024
:
544
512
:
272
256
:
136
128
:
68
64
:
2
0
D7
Sign
1
1
1
1
1
1
1
1
D6
Chord
D5
Chord
Digital Code
D4
D3
Chord Step
0
1
0
1
0
1
0
0
0
1
1
0
0
0
0
0
0
0
1
0
1
1
0
0
1
1
0
0
1
0
1
0
D2
Step
0
1
1
1
1
1
1
1
D1
Step
D0
Step
Normalized
Decode
Levels
1
0
4032
:
0
1
2112
:
0
1
1056
:
0
1
528
:
0
1
264
:
0
1
132
:
0
1
66
:
0
1
1
Notes:
1. Sign bit = 0 for negative values, sign bit = 1 for positive values
2. Digital code includes inversion of all even number bits
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Publication Release Date: October, 2005
Revision A11