Method and apparatus for encoding motion information using skip mode, and method and apparatus for decoding same

An encoding apparatus which uses a skip mode, the encoding apparatus comprising:

• a motion information candidate group generator configured to obtain a plurality of motion information candidates of a current predictor by using at least one predictor which is related to the current predictor;
• a most probable prediction candidate determiner configured to determine, based on a predetermined standard, a candidate that is most likely to be selected from among the obtained plurality of motion information candidates as a most probable prediction candidate;
• and
• a motion information encoder configured to, when a prediction mode of the current predictor corresponds to a most probable skip mode when using the determined most probable prediction candidate, gencode a flag which indicates the most probable skip mode.

A decoding method which uses a skip mode, the decoding method comprising:

• obtaining a plurality of motion information candidates of a current predictor by using at least one predictor which is related to the current predictor;
• determining, based on a predetermined standard, a candidate that is most likely to be selected from among the obtained plurality of motion information candidates as a most probable prediction candidate;
• obtaining a flag which indicates a prediction mode of the current predictor from a bitstream;
• and
• when the obtained flag indicates a most probable skip mode when using the determined most probable prediction candidate, obtaining the determined most probable prediction candidate as motion information which relates to the current predictor.

A decoding apparatus which uses a skip mode, the decoding apparatus comprising:

• a motion information candidate group generator configured to obtain a plurality of motion information candidates which relate to a current predictor by using at least one predictor which is related to the current predictor;
• a most probable prediction candidate determiner configured to determine, based on a predetermined standard, a candidate that is most likely to be selected from among the obtained plurality of motion information candidates as a most probable prediction candidate;
• an entropy decoder configured to obtain a flag which indicates a prediction mode of the current predictor from a bitstream;
• and
• a motion information decoder configured to, when the flag indicates a most probable skip mode when using the determined most probable prediction candidate, obtain the determined most probable prediction candidate as motion information which relates to the current predictor.