关键词: FPGA, 虚拟听觉, FIR滤波器, 头相关传输函数

Abstract: The virtual auditory system based on FPGA has the advantages of low hardware requirements and small device size, and it has been widely used in virtual reality, auditory psychology and other fields. However, the existing virtual auditory system based on FPGA still has some problems, such as high multiplier resource consumption and low vertical direction accuracy. In order to solve these problems, a method of distinguishing the vertical direction based on the loudness of the output sound is proposed, and a virtual auditory system based on FPGA is constructed. This system uses a folded finite impulse response (FIR) filter as the core data processing unit, and can change the positioning direction in real time through the host computer software. The FPGA board verification results show that the system implements the virtual auditory function well, and has the advantages of low multiplier resource consumption and high average accuracy.

Key words: FPGA, virtualauditory, FIRfilter, head-relatedtransferfunction