W681513_05 Datasheet, PDF (28/35 Pages) Winbond – 5V SINGLE-CHANNEL VOICEBAND CODEC FOR USB APPLICATIONS

W681513
10.5.3. PCM Codes for Zero and Full Scale
μ-Law
Level
Sign bit Chord bits Step bits
(D7) (D6,D5,D4) (D3,D2,D1,D0)
+ Full Scale
1
000
0000
+ Zero
1
111
1111
- Zero
0
111
1111
- Full Scale
0
000
0000
Sign bit
(D7)
1
1
0
0
A-Law
Chord bits
(D6,D5,D4)
010
101
101
010
Step bits
(D3,D2,D1,D0)
1010
0101
0101
1010
10.5.4. PCM Codes for 0dBm0 Output
μ-Law
Sample
Sign bit Chord bits Step bits
(D7) (D6,D5,D4) (D3,D2,D1,D0)
1
0
001
1110
2
0
000
1011
3
0
000
1011
4
0
001
1110
5
1
001
1110
6
1
000
1011
7
1
000
1011
8
1
001
1110
Sign bit
(D7)
0
0
0
0
1
1
1
1
A-Law
Chord bits
(D6,D5,D4)
011
010
010
011
011
010
010
011
Step bits
(D3,D2,D1,D0)
0100
0001
0001
0100
0100
0001
0001
0100
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