Method and apparatus for encoding/decoding motion vector

摘要

Provided are methods and apparatuses for encoding and decoding a motion vector. The method of encoding the motion vector includes: selecting, as a mode of encoding information about a motion vector predictor of the current block, a first mode in which information indicating the motion vector predictor from among at least one motion vector predictor is encoded or a second mode in which information indicating generation of the motion vector predictor based on blocks or pixels included in a previously encoded area adjacent to the current block is encoded; determining the motion vector predictor of the current block according to the selected mode and encoding the information about the motion vector predictor of the current block; and encoding a difference vector between the motion vector of the current block and the motion vector predictor of the current block.

主权项

1. An apparatus of decoding an image, the apparatus comprising:
a predictor which determines, when a prediction mode of a current block is inter-prediction, motion vector predictor candidates from among motion vectors neighboring blocks, and determines a motion vector predictor of a current block from among the motion vector predictor candidates; and a motion vector restoring unit which obtains a motion vector of the current block based on the motion vector predictor and a differential vector, wherein the neighboring blocks comprise at least one of a first block and a second block, the first block is located on a the left side of a leftmost block among lower blocks adjacent to a lower side of the current block, the first block is located below a lowermost block among left blocks adjacent to a left side of the current block, and the second block is located on an upper side of the first block.