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
DRC
0x3A 0x40,0x41,0x42 0x3B/0x3C
Compression
Control
Attack
and
Decay
Filters
AudioInput
DRCCoefficient
NOTE:
=1 –w a
TAS5707, TAS5707A
SLOS556B –NOVEMBER 2008–REVISED NOVEMBER 2009 www.ti.com
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.
The DRC input/output diagram is shown in Figure 31.
Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.
• One DRC for left/right
• The 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 31. Dynamic Range Control
Figure 32. DRC Structure
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