Design and Performance Research of Reverberation Filter System Based on Source Image Method

To simulate reverberation effect in different environment and improve audio quality,a digital reverberation system based on ARC600 DSP is researched in this paper. In order to design a reverberation system which have adjustable room parameters,with the combination of the characteristics of room acoustics,this paper uses source image method to calculate filter parameters of the early reverberation,and simulates the late reverberation by using improved Schroeder model,in which a low pass filter is used to simulate the effect of air absorption to high frequency. The simulation results obtained by MATLAB simulator show that this reverb algorithm can simulate natural reverberation characteristics realistically. After optimizing with the reference of ARC600 memory structure finally,it gains an additional 40 percents on the operation speed in 1 cycle,which enhances the real- time running on the DSP platform of the system.