Audio upmixing method and device, electronic device and storage medium

The invention provides an audio upmixing method and apparatus, an electronic device and a storage medium. The method comprises the steps of determining a to-be-upmixed original audio signal; performing phase randomization processing for each upmixing channel on a to-be-translated frequency band of the original audio signal to obtain an upmixing frequency domain signal corresponding to each upmixing channel; and converting the up-mixing domain signal corresponding to each up-mixing channel into a time domain to obtain an up-mixing audio signal corresponding to each up-mixing channel. Accordingto the audio upmixing method and device, the electronic device and the storage medium provided by the invention, the original audio signals are upmixed into the upmixed audio signals corresponding tothe plurality of channels, so that a listening feeling with higher spatial surrounding feeling and immersion feeling can be brought to a listener, the audio upmixing effect is optimized, and the audioupmixing efficiency is imp