Improved primary-ambient component extraction method and equipment and computer readable storage medium

The invention discloses an improved primary-ambient component extraction method, equipment and a computer readable storage medium, and belongs to the technical field of audio and video processing. The extraction method provided by the invention comprises the following steps: estimating an energy ratio of primary components of two sound channels, and solving a component value of each positive frequency point of audio in each frame; then obtaining an optimal estimation of an ambient component phase angle; and finally, constructing a corresponding negative frequency point component value through a conjugate symmetry relation, and performing conversion processing from a frequency domain to a time domain on each frequency point component value of each frame to obtain ambient component signals and primary component signals of the left sound channel and the right sound channel of a to-be-extracted dual-track audio signal. The method can be used for stereo expansion, so that channel format stereo audio can be compati