Datasheet

Output Level (dB)
Input Level (dB)
T
K
M0091-03
1:1 Transfer Function
Implemented Transfer Function
S
Z
–1
Alpha Filter Structure
w
a
B0265-04
Energy
Filter
a w,
T a w
a
,
a d d
/ ,a w
DRC1
DRC2
0x3B 0x40 0x3C
0x3F
0x43
0x3E
Threshold
Detect
Attack
and
Decay
Filters
Audio Input
DRC Coefficient
TAS5717
TAS5719
SLOS655A –NOVEMBER 2010– REVISED FEBRUARY 2011 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
high-band left/right channels and one DRC for the low-band left/right channels.
The DRC input/output diagram is shown in Figure 40.
See the GDE software tool for more description on the T, K, and O parameters.
Professional-quality dynamic range compression automatically adjusts volume to flatten volume level.
• Each DRC has adjustable threshold 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 40. Dynamic Range Control
T = 9.23 format, all other DRC coefficients are 3.23 format
Figure 41. DRC Structure
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Product Folder Link(s): TAS5717 TAS5719