Environment-adaptive sound field playback space decoding method

The invention discloses an environment-adaptive sound field playback space decoding method, which comprises the following steps of: (1) setting a plurality of sound sources and a listening area in a target environment, and measuring a sound field generated by each sound source in a preset listening area of the target environment; (2) calculating a sound field transfer function from a corresponding sound source to the listening area according to the measured sound field, and expressing the sound field transfer function by using a group of HOA coefficients to obtain a sound source HOA domain coefficient corresponding to each sound field transfer function; (3) using the sound source HOA domain coefficient corresponding to the sound field transfer function to replace a sound source HOA domain coefficient based on a free sound field hypothesis in a space decoding process of sound field playback, and inputting the replaced sound source HOA domain coefficient into a partial matching projection decoding algorithm to