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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decoding an input bitstream to generate a motion vector difference for a current block; interpolating a motion vector of a first neighboring block of the current block based on a first distance and a second distance to generate a first interpolated motion vector, wherein the first neighboring block is in a current picture, the first distance is a distance between a reference picture of the first neighboring block and the current picture, and the second distance is a distance between a reference picture of the current block and the current picture; interpolating a motion vector of a second neighboring block of the current block based on a third distance and a fourth distance to generate a second interpolated motion vector, wherein the second neighboring block is in the current picture, the third distance is a distance between a reference picture of the second neighboring block and the current picture and the fourth distance is 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 first interpolated motion vector and the second interpolated motion vector to generate a predicted motion vector; and adding the predicted motion vector and the motion vector difference to generate the motion vector of the current block. - 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 decoder configured to decode an input bitstream to generate a motion vector difference for a current block; a prediction motion vector generator configured to interpolate a motion vector of a first neighboring block of the current block based on a first distance and a second distance to generate a first interpolated motion vector, wherein the first neighboring block is in a current picture, the first distance is a distance between a reference picture of the first neighboring block and the current picture, and the second distance is a distance between a reference picture of the current block and the current picture, interpolate a motion vector of a second neighboring block of the current block based on a third distance and a fourth distance to generate a second interpolated motion vector, wherein the second neighboring block is in the current picture, the third distance is a distance between a reference picture of the second neighboring block and the current picture and the fourth distance is a distance between a reference picture of the current block and the current picture, and predict a motion vector of the current block based on the first interpolated motion vector and the second interpolated motion vector to generate a predicted motion vector; and a first adder configured to add the predicted motion vector and the motion vector difference to generate the motion vector of the current block. - 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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interpolating a motion vector of a first neighboring block of the current block based on a first distance and a second distance to generate a first interpolated motion vector, wherein the first neighboring block is in a current picture, the first distance is a distance between a reference picture of the first neighboring block and the current picture, and the second distance is a distance between a reference picture of the current block and the current picture; interpolating a motion vector of a second neighboring block of the current block based on a third distance and a fourth distance to generate a second interpolated motion vector, wherein the second neighboring block is in the current picture, the third distance is a distance between a reference picture of the second neighboring block and the current picture and the fourth distance is 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 first interpolated motion vector and the second interpolated motion vector to generate a predicted motion vector of the current block; generating the motion vector of the current block; and encoding a difference between the motion vector of the current block and the predicted motion vector of the current block. - View Dependent Claims (38)
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Specification