RATE DISTORTION OPTIMIZATION METHOD AND APPARATUS, AND COMPUTER-READABLE STORAGE MEDIUM

Provided are a rate distortion optimization method and apparatus, and a computer-readable storage medium. The method can comprise: acquiring a current frame of image to be coded; if the current frame of image to be coded is not the first frame of image to be coded, acquiring an initial Lagrange multiplier, a coding bit rate of a coding unit level of the previous frame of image to be coded and an estimated Lagrange multiplier of the coding unit level of the previous frame of image to be coded; according to the initial Lagrange multiplier, the coding bit rate of the coding unit level of the previous frame of image to be coded, the estimated Lagrange multiplier of the coding unit level of the previous frame of image to be coded, a pre-set coding bit rate and an estimated Lagrange multiplier model, obtaining an estimated Lagrange multiplier of a coding unit level of the current frame of image to be coded; and using the estimated Lagrange multiplier of the coding unit level of the current frame of image to be code