Spacing parameter choosing method and apparatus based on spacing perception entropy judgement

The invention proposes a spatial parameter selection method based on spatial awareness entropy judgment and a device thereof. The method comprises the steps of: pre-selecting spatial parameters by comparing the critical perception threshold values of spatial parameters of adjacent frequency bands and amending the pre-selecting result according to the spatial awareness entropy of an actual signal and the magnitude of the fluctuation thereof, thus realizing low-complexity and high-efficiency spatial parameter selection. The invention can optimize spatial parameter selection and realize high-efficiency spatial audio coding.