Datasheet

Dynamic Range Control (DRC)
O
utput Level (dB)
Input Level (dB)
T
O
K
M0091-02
1:1 TransferFunction
Implemented TransferFunction
S
Z
–1
AlphaFilterStructure
w
a
B0265-01
Energy
Filter
a w,
T,K,O a w
a
,
a d d
/ ,a w
DRC1
DRC2
0x3A 0x40,0x41,0x42 0x3B/0x3C
0x3E/0x3F
0x43,0x44,0x45
0x3D
Compression
Control
Attack
and
Decay
Filters
AudioInput
DRCCoefficient
NOTE:
=1 –w α
TAS5710
SLOS605 – JANUARY 2009 ............................................................................................................................................................................................... www.ti.com
The DRC scheme has a single threshold, offset, and slope (all programmable). There is one ganged DRC for the
left/right channels and one DRC for the subwoofer channel.
The DRC input/output diagram is shown in Figure 32 .
Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.
• One DRC for left/right and one DRC for subwoofer
• Each DRC has adjustable threshold, offset, and compression levels
• Programmable energy, attack, and decay time constants
• Transparent compression: compressors can attack fast enough to avoid apparent clipping before engaging,
and decay times can be set slow enough to avoid pumping.
Figure 32. Dynamic Range Control
Figure 33. DRC Structure
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