Video encoding method and device and decoding method and device

摘要

Disclosed are a video encoding method and device and decoding method and device. In the video encoding method according to the present invention, a fast transformation matrix is generated based on a transformation matrix used in the frequency transformation of a block of a predetermined size, and a transform block is generated by using the fast transformation matrix to transform the block of the predetermined size, and then scaling is carried out on the transform block in order to compensate for the value of the difference between the transformation matrix used in the frequency transformation and the fast transformation matrix.