Datasheet

Output 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
TAS5711
www.ti.com SLOS600A –DECEMBER 2009–REVISED AUGUST 2010
Dynamic Range Control (DRC)
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 subchannel.
The DRC input/output diagram is shown in Figure 52.
Refer to GDE software tool for more description on T, K, and O parameters.
Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.
• 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 52. Dynamic Range Control
T = 9.23 format, all other DRC coefficients are 3.23 format
Figure 53. DRC Structure
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