|
|
|
A. Farina, E. Ugolotti, A. Bellini, G. Cibelli,
C. Morandi |
|
|
|
|
Loudspeaker physical conformation; |
|
Loudspeaker non-linear modeling; |
|
Digital audio Processor for distortion
compensation; |
|
DSP implementation; |
|
Measured distortion results; |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Audio
processor implemented with a 320C54x
DSK; |
|
40 MIPS,
10Kword Dual Access RAM; |
|
Sampling
frequency 23148 Hz; |
|
Converter resolution 14 bit. |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Definition of a non-linear model for low
frequency loudspeaker systems; |
|
Design of a parametric audio processor for the
compensation of non-linear distortion of loudspeaker; |
|
Implementation of the audio processor with a low cost
commercial DSP; |
|
Measured
reduction of Distortion with the insertion of the audio processor; |
|
|
|
|
New Hardware (Analog Devices SHARC on the EZ-KIT
stand-alone board) |
|
Inverse filters computed with the Kirkeby
regularization technique |
|
Full-band linearization by means of “warping”
instead of dual-band processing |
|
The inverse filter will include also the
acoustics behaviour of the car compartment |
|
Notes