IMAGE ENCODING METHOD AND APPARATUS, AND IMAGE DECODING METHOD AND APPARATUS ACCORDING TO PREDICTION MOTION VECTOR SELECTION

摘要

PURPOSE: An image encoding method and device in accordance with the selection of a predicted motion vector, and an image decoding method and device are provided to variably change and encode uniformly fixed prediction priority of motion vectors through the reflection of various image characteristics, thereby performing high-efficiency compression. CONSTITUTION: A motion vector grouping part(210) groups motion vectors of neighboring blocks into two groups. A priority determination part(220) selects a group containing more motion vectors among the two grouped groups and determines the priority of predicted motion vector candidates of a current prediction unit based on the motion vectors contained in the selected group. A transmission part(230) successively selects a predicted motion vector of the current prediction unit based on the priority. [Reference numerals] (210) Motion vector grouping part; (220) Priority determination part; (230) Transmission part