predictive intra-frame predictive coding and decoding methods based on model matching, matrix scanning apparatus and method and apparatus.

摘要

According to intra-frame predictive coding and decoding methods based on template matching, an array scanning method and apparatus, and an apparatus that are disclosed in embodiments of the present invention, templates of at least two shapes are used to calculate predicted pixel values of a to-be-predicted unit. Intra-frame prediction based on template matching is performed based on a correlation between a texture of a template region and a texture of a to-be-predicted unit. Compared with a template of a single shape, templates of different shapes can represent different textures; when a correlation between a texture of a template of a shape and a texture of a to-be-predicted unit is low, a template of another shape may be selected and used, and a matching degree between a texture of a template and a texture of a to-be-predicted unit can be increased. In this way, an optimal predicted pixel value is determined from at least two predicted pixel values, and accuracy of the optimal predicted pixel value is higher than accuracy of a predicted pixel value determined by using a template of a single shape.