Method and an apparatus for processing a video signal

Abstract

A method of processing a video signal is disclosed. The present invention includes obtaining a current macroblock type, obtaining skip or direct mode indication information on a partition of the current macroblock according to the current macroblock type, deriving a motion vector of the partition according to the skip or direct mode indication information, and predicting a pixel value of the partition using the motion vector. Accordingly, the present invention obtains a pixel value of a reference block close to an original video using a motion vector, thereby enhancing a reconstruction ratio of the macroblock. As a macroblock uses skip or direct prediction indication information, it is unnecessary to separately code skip mode indication information and direct mode indication information on the macroblock, whereby an information size to be coded can be reduced.

What is claimed is: 
     
         1 . A method of encoding a video signal bitstream, the method performed by an encoding apparatus and comprising:
 constructing, by the encoding apparatus, motion vector predictor candidates for a current block, the motion vector predictor candidates consisting of a motion vector of a top neighboring block and a motion vector of a left neighboring block, the top neighboring block and the left neighboring block being adjacent to the current block;   determining, by the encoding apparatus, a motion vector predictor of the current block from among the motion vector predictor candidates;   obtaining, by the encoding apparatus, a motion vector difference of the current block based on the motion vector predictor;   encoding, by the encoding apparatus, index information specifying the motion vector predictor from among the motion vector predictor candidates and;   encoding, by the encoding apparatus, the motion vector difference of the current block into the video signal bitstream.   
     
     
         2 . A non-transitory computer—readable storage medium storing a video signal bitstream generated by an encoding method, the encoding method comprising:
 constructing, by the encoding apparatus, motion vector predictor candidates for a current block, the motion vector predictor candidates consisting of a motion vector of a top neighboring block and a motion vector of a left neighboring block, the top neighboring block and the left neighboring block being adjacent to the current block; 
 determining, by the encoding apparatus, a motion vector predictor of the current block from among the motion vector predictor candidates; 
 obtaining, by the encoding apparatus, a motion vector difference of the current block based on the motion vector predictor; 
 encoding, by the encoding apparatus, index information specifying the motion vector predictor from among the motion vector predictor candidates and; 
 encoding, by the encoding apparatus, the motion vector difference of the current block into the video signal bitstream. 
 
     
     
         3 . A method of transmitting a video signal bitstream which is generated by an encoding method, the encoding method comprising:
 constructing, by the encoding apparatus, motion vector predictor candidates for a current block, the motion vector predictor candidates consisting of a motion vector of a top neighboring block and a motion vector of a left neighboring block, the top neighboring block and the left neighboring block being adjacent to the current block;   determining, by the encoding apparatus, a motion vector predictor of the current block from among the motion vector predictor candidates;   obtaining, by the encoding apparatus, a motion vector difference of the current block based on the motion vector predictor;   encoding, by the encoding apparatus, index information specifying the motion vector predictor from among the motion vector predictor candidates and;   encoding, by the encoding apparatus, the motion vector difference of the current block into the video signal bitstream.