Patent ID: 8687692

Claim:
A method of decoding a video signal to enhance coding efficiency in a transform process, comprising: obtaining a prediction partition mode of a current block; deriving, at a decoder, transform partition information of the current block based on the prediction partition mode, wherein an MÃ—N transform partition is derived when the prediction partition mode of the current block indicates that a prediction partition of the current block is a PÃ—Q prediction partition, and wherein an NÃ—N transform partition is derived when the prediction partition mode of the current block indicates that the prediction partition of the current block is a PÃ—P prediction partition; reconstructing residual data for the current block by performing an inverse transform based on the derived transform partition information; obtaining a prediction value of the current block based on the prediction partition mode; and reconstructing a pixel value of the current block based on the reconstructed residual data and the prediction value of the current block, wherein the residual data is a pixel value difference between the reconstructed pixel value and the obtained prediction value, wherein M is greater than N, and M and N are each a natural number, and wherein P is greater than Q, and P and Q are each a natural number.