Method and apparatus for predictive encoding/decoding of motion vector

摘要

A video encoding apparatus for predicting a motion vector of a current block to be encoded is to determine one or more representative blocks from neighboring blocks of the current block according to priorities of the neighboring blocks; and encode the motion vector of the current block by using, as a predicted motion vector of the current block, a first motion vector selected from motion vectors of the determined one or more representative blocks and a second motion vector of at least one block within a reference picture.

主权项

1. A video decoding method performed by a video decoding apparatus for predicting a current block to be decoded, the method comprising:
extracting an index for use in identifying a predicted motion vector of the current block and a differential motion vector from a bitstream; determining one or more representative blocks using neighboring blocks of the current block, in consideration of priorities of block positions; determining the predicted motion vector of the current block to be a motion vector identified by the extracted index; and generating a predicted block of the current block by reconstructing a motion vector of the current block based on the determined predicted motion vector and the extracted differential motion vector, wherein the determining of the one or more representative blocks comprises considering a difference between a first picture order count (POC) corresponding to a first reference picture of a neighboring block and a second picture order count (POC) corresponding to a second reference picture of the current block when a first inter prediction direction corresponding to the neighboring block and a second inter prediction direction corresponding to the current block are identical.