TAS3004PFB Datasheet, PDF (75/84 Pages) Texas Instruments – Digital Auido Processor With Codec

A.7.2 Above Threshold Ratios
The above threshold ratios are applied when the energy level of the incoming signal is detected anywhere between
the threshold (from Table A–15) and 0 dB. See Figure A–1.
Output (dB)
0 dB
Expansion
Ratio = 1:1
Compression
A–10
–89.625 dB
–89.625 dB
Threshold
0 dB
Input (dB)
Below Threshold
Above Threshold
Figure A–1. TAS3004 DRCE Characteristics in the dB Domain
Table A–11. Above Threshold Ratios for Compression
HEXADECIMAL VALUE
RATIO (IN:OUT)
02
1.00 : 1
08
1.07 : 1
10
1.14 : 1
18
1.23 : 1
20
1.33 : 1
28
1.45 : 1
30
1.60 : 1
38
1.78 : 1
40
2.00 : 1
48
2.29 : 1
50
2.67 : 1
58
3.20 : 1
60
4.00 : 1
68
5.33 : 1
70
8.00 : 1
78
16.0 : 1