Method for decoding video using in-loop filter, and device therefor

Abstract

The present invention provides a method and apparatus for encoding/decoding an image and for adjusting a reconstructed pixel by scaling an offset of an in-loop filter having a scaled offset value. The method includes: obtaining information of a scale default value of a current block from a bitstream; obtaining offset parameter merge information of the current block from the bitstream; obtaining the offset parameter of the current block on the basis of the offset parameter merge information; determining whether a scale residual value of the current block is obtained from the bitstream on the basis of the offset parameter merge information; obtaining a scale value on the basis of the scale default value and the scale residual value; scaling an offset on the basis of the offset parameter and the scale value; and adjusting a pixel value of the current block on the basis of the scaled offset.

1 . A method for decoding a video signal, the method comprising:
 obtaining information of default value of a first information of a current block from a bitstream;   obtaining merge information of the current block from the bitstream;   obtaining a parameter of the current block based on the merge information;   obtaining a value of the first information based on the information of the default value of the first information;   performing scaling based on the value of the first information and the parameter; and   deriving a pixel value of the current block based on of the scaled result.   
     
     
         2 . The method of  claim 1 , wherein the merge information indicates whether or not the parameter of the current block is derived based on at least one of neighboring blocks adjacent to the current block. 
     
     
         3 . The method of  claim 1 , wherein a neighboring block includes at least one of a spatial neighboring block spatially adjacent to the current block, and a temporal neighboring block temporally adjacent to the current block.