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Application Report
SLOA148–June 2010
TAS57xx Dynamic Range Control
Brian Burk ................................................................................................ Audio and Imaging Products
ABSTRACT
This application report provides background information, general equations, and instructions for proper
use of the Texas Instruments TAS57xx series Dynamic Range Control (DRC). Topics include I
2
C
configuration, single-band and dual-band DRC, coefficient computation, device offerings, and user
interface configuration.
Contents
1 Dynamic Range Control (DRC) ........................................................................................... 2
1.1 DRC Implementation .............................................................................................. 2
1.2 DRC Structure ...................................................................................................... 3
2 Single-Band DRC Control .................................................................................................. 4
3 Dual-Band DRC Control .................................................................................................... 4
4 DRC Coefficients ............................................................................................................ 4
5 Threshold, Offset, and Compression Computation ..................................................................... 5
5.1 Threshold Parameter Computation .............................................................................. 5
5.2 Slope Parameter Computation ................................................................................... 5
5.3 DRC Offset Calculation ........................................................................................... 6
6 DRC Configuration Using the TAS57xx GDE ........................................................................... 6
6.1 Opening the DRC Tool ............................................................................................ 6
6.2 Adjust DRC Parameters Using the Form ....................................................................... 7
6.3 Adjust DRC Parameters using the Graph ...................................................................... 7
7 Device Offerings ............................................................................................................ 7
List of Figures
1 Dynamic Range Control ................................................................................................... 2
2 DRC Block Diagram ....................................................................................................... 3
3 DRC Structure .............................................................................................................. 4
4 DRC Configuration Tool.................................................................................................... 6
5 TAS57xx DRC Icon ........................................................................................................ 7
List of Tables
1 Dual-Band DRC Control Inputs ........................................................................................... 4
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SLOA148–June 2010 TAS57xx Dynamic Range Control
Copyright © 2010, Texas Instruments Incorporated
