Patent Document ID: 8908760
Application ID: 13262409
Patent Status: 1

Claim One:
1. A method for decoding a video signal by a video decoding apparatus, comprising: receiving the video signal; obtaining a motion vector of a current block from the video signal, the current block being included in a current frame; obtaining a prediction value of the current block using the motion vector of the current block; reconstructing the current frame using the prediction value of the current block and residual data of the current block; applying a deblocking filter to the reconstructed current frame based on a boundary strength; obtaining a filter coefficient of an adaptive loop filter and filter application information from the video signal when the adaptive loop filter is applied to the deblocking filtered current frame, the filter application information indicating whether the adaptive loop filter is adaptively applied to each block in the current frame or the adaptive loop filter is applied to all blocks in the current frame; obtaining block partition information for the current block when the filter application information indicates the adaptive loop filter is adaptively applied to each block in the current frame; obtaining filter block information for a sub-block in the current block, the filter block information indicating whether the adaptive loop filter is applied to the sub-block, and the current block including at least one sub-block based on the block partition information; and applying the filter coefficient of the adaptive loop filter to the sub-block in the deblocking filtered current frame when the filter block information indicates the adaptive loop filter is applied to the sub-block.