METHOD AND DEVICE FOR PREDICTING VIDEO IMAGE COMPONENTS

摘要

Embodiments of the present invention provide a method and a device for predicting video image components. The method comprises: obtaining a luminance component value of an image block; obtaining a first numerical value a3 through a linear regression technology based on a luminance component value and a chrominance component value of a sampling point in an application template, changing numerical precision after compensating the first numerical value a3 so as to obtain a first parameter alpha and a third parameter k; obtaining a second parameter beta of a linear model based on the first parameter alpha and the third parameter k; obtaining a predicted value of a chrominance component of the image block through the linear model based on the luminance component value of the image block, the first parameter alpha, the third parameter k and the second parameter beta. The technical solution enhances encoding performance by improving a parameter in the linear model used at the time of predicting the video image components, and meanwhile lowers complexity of the device using the predicting method.