Method and apparatus for encoding video and method and apparatus for decoding video by considering skip and split order

A video decoding apparatus comprising:

• a receiver which receives a bitstream of encoded video;
• an extractor which extracts, from the bitstream, split information of a coding unit in a maximum coding unit of a picture;
• and
• a decoder which, when the split information indicates a split for a current depth, splits a coding unit of the current depth, independently from neighboring coding units, into coding units of a lower depth, and
• when the split information indicates a non-split for the current depth, determines at least one partition from the coding unit of the current depth and decodes the coding unit of the current depth by performing a prediction based on the at least one partition,
• wherein, when skip information for the coding unit of the current depth indicates a skip mode, the coding unit of the current depth is decoded by performing a prediction in the skip mode based on a partition having a size equal to a size of the coding unit of the current depth;
• and
• when the skip information for the coding unit of the current depth does not indicate the skip mode, the coding unit of the current depth is decoded by performing a prediction in a prediction mode indicated by prediction mode information obtained from the bitstream.