METHOD OF PREDICTING MOTION VECTORS IN VIDEO CODEC IN WHICH MULTIPLE REFERENCES ARE ALLOWED, AND MOTION VECTOR ENCODING/DECODING APPARATUS USING THE SAME
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Abstract
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.
8 Citations
38 Claims
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1-18. -18. (canceled)
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19. A decoding method of a decoding device, comprising:
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obtaining motion vectors of neighboring blocks of a current block, wherein the motion vectors correspond to neighboring blocks respectively, and the neighboring blocks are in a current picture; generating interpolated motion vectors, wherein each of interpolated motion vectors is generated by interpolating a motion vector of a corresponding neighboring 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; predicting a motion vector of the current block based on the interpolated motion vectors to generate a predicted motion vector; and generating a motion vector of the current block by using the predicted motion vector. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A decoding device, comprising:
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a predicted motion vector generator that obtains motion vectors of neighboring blocks of a current block, wherein the motion vectors correspond to neighboring blocks respectively, and the neighboring blocks are in a current picture, generates interpolated motion vectors, wherein each of interpolated motion vectors is generated by interpolating a motion vector of a corresponding neighboring 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, and predicts a motion vector of the current block based on the interpolated motion vectors to generate a predicted motion vector; and a first adder that generates a motion vector of the current block by using the predicted motion vector. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36)
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37. An encoding method of an encoding device, comprising:
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obtaining motion vectors of neighboring blocks of a current block, wherein the motion vectors correspond to neighboring blocks respectively, and the neighboring blocks are in a current picture; generating interpolated motion vectors, wherein each of interpolated motion vectors is generated by interpolating a motion vector of a corresponding neighboring 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; predicting a motion vector of the current block based on the interpolated motion vectors to generate a predicted motion vector; and generating a motion vector of the current block; and encoding a difference between the motion vector of the current block and the predicted motion vector. - View Dependent Claims (38)
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Specification