METHOD FOR DYNAMICALLY ADJUSTING GAIN OF PARAMETRIC EQUALIZER ACCORDING TO INPUT SIGNAL, DYNAMIC PARAMETRIC EQUALIZER AND DYNAMIC PARAMETRIC EQUALIZER SYSTEM EMPLOYING THE SAME

摘要

The present invention relates to a method for dynamically adjusting a gain of parametric equalizer according to an input signal, a dynamic parametric equalizer employing the same and a dynamic parametric equalizer system employing the same wherein a gain of parametric equalizer is dynamically adjusted according to a level of an input digital audio signal to prevent distortion of output signal.

主权项

1. A parametric equalizer having a transfer function H(z) with a preset gain G as a parameter, the parametric equalizer dynamically adjusting the preset gain G, the parametric equalizer comprising:
a first signal processing unit having a transfer function H1, the first signal processing unit being configured to process an input digital audio signal X according to the transfer function H1 and output a first output signal obtained by processing the input digital audio signal X; a second signal processing unit having a transfer function H2 of a level Gin of the first output signal, the second signal processing unit being configured to process the first output signal according to the transfer function H2 and output a second output signal obtained by processing the first output signal; and an adder configured to add the second output signal to the input digital audio signal X to generate an output digital audio signal Y (where H1=[H(z)−1]/(G−1), H2=G−1 when 0