Method of predicting motion vectors in video codec in which multiple references are allowed, and motion vector encoding/decoding apparatus using the same

摘要

Initial value is selected when motion estimation is performed using predicted motion vector in video codec in which multiple references are allowed, and coding amount of motion vectors is reduced using predicted motion vector. Motion vector encoding apparatus includes predicted motion vector generator that generates adjacent motion vectors of current block with respect to each of reference pictures and generates each predicted motion vector of the current block from the generated adjacent motion vectors, motion estimator that determines final motion vector of the current block and final reference picture corresponding to the final motion vector with regard to search regions of the reference pictures, differential unit that obtains difference between the final motion vector of the current block and final predicted motion vector corresponding to the determined final reference picture among the predicted motion vectors, and unit for encoding information about the final reference picture and the difference.

主权项

1. A decoding method of a decoding device, comprising:
decoding, by the decoding device, an input bitstream to generate a motion vector difference for a current block; obtaining, by the decoding device, motion vectors of neighboring blocks of the current block, wherein the motion vectors correspond to neighboring blocks respectively, the neighboring blocks and the current block are in a current picture, and the motion vectors of the neighboring blocks are used to decode the respective neighboring blocks according to respective reference pictures of the neighboring blocks; generating, by the decoding device, interpolated motion vectors, wherein each of the interpolated motion vectors is generated by interpolating a motion vector of a corresponding neighboring block of the current block based on a distance between a reference picture of the corresponding neighboring block and the current picture and a distance between a reference picture of the current block and the current picture, wherein the reference picture of the corresponding neighboring block is different from the reference picture of the current block; predicting, by the decoding device, a motion vector of the current block based on the interpolated motion vectors to generate a predicted motion vector; and generating, by the decoding device, a motion vector of the current block by using the predicted motion vector.