Directional filter generation method and device, audio processing method and device and storage medium

The invention relates to a directional filter generation method, an audio processing method and device and a storage medium, and aims to reduce the size of an HRTF database, save the storage space of the HRTF database and reduce the calculation amount of an algorithm by reducing parameters of a directional filter. The direction filter generation method comprises the following steps: determining a first impulse response corresponding to each sound source angle according to an initial head related transfer function database; determining a target system frequency response corresponding to each sound source angle according to the first impulse response; constructing a direction filter corresponding to each initial sound source angle, wherein the direction filters share preset pole parameters; and for each sound source angle, generating a direction filter corresponding to the sound source angle according to the unit impulse function, the target system frequency response corresponding to the sound source angle and