LE58QL061BVC Zarlink, LE58QL061BVC Datasheet - Page 84

• Manufacturer Part Number: LE58QL061BVC
• Description: QUAD, SLAC, PROG CODEC, 3.3V, GCI, 20 I/0, PQT44, LEAD FREE
• Manufacturer: Zarlink

A-Law and µ-Law Companding
Table
Notes:
1.
2.
3.
4.
5.
4096 normalized value units correspond to TMAX = 3.14 dBm0.
The character signals are obtained by inverting the even bits of the signals of column 6. Before this inversion, the character signal
corresponding to positive input values between two successive decision values numbered n and n+1 (see column 4) is 128+n, expressed
as a binary number.
The value at the decoder output is
x
Bit 1 is a 0 for negative input values.
128
Table 13
is a virtual decision value.
Table 13. A-Law: Positive Input Values
Segment
Number
and Table
2
1
1
3
7
5
4
6
# Intervals
x Interval
Table 14
16 x 128
16 x 64
16 x 32
16 x 16
16 x 8
16 x 4
32 x 2
Size
2
show the companding definitions used for A-law and
y
n
End Points
Segment
Value at
=
4096
2048
1024
512
256
128
x
------------------------ -
64
3
n 1
–
2
+
x
n
Decision
Number n
, for n = 1,...127, 128.
Zarlink Semiconductor Inc.
Value
(128)
127
113
112
97
96
81
80
65
64
49
48
33
32
1
0
4
84
(See Note 1)
Decision
Value x
(4096)
3968
2176
2048
1088
1024
544
512
272
256
136
128
68
64
5
2
0
n
1 0 1 1 0 0 0 0
1 2 3 4 5 6 7 8
1 1 1 1 1 1 1 1
1 1 0 1 0 0 0 0
Inversion of
1 1 1 0 0 0 0 0
1 1 1 1 0 0 0 0
1 1 0 0 0 0 0 0
1 0 1 0 0 0 0 0
1 0 0 0 0 0 0 0
Character
Signal pre
Even Bits
See Note 2
See Note 2
See Note 2
See Note 2
See Note 2
See Note 2
See Note 2
Bit No.
6
µ
-law PCM encoding.
Quantized
Value (at
Output) y
Decoder
4032
2112
1056
528
264
132
66
1
7
n
Decoder
Value No.
Output
128
113
97
81
65
49
33
1
8