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.
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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 a motion vector of a neighboring block of a current block, wherein the neighboring block is in a current picture; interpolating the motion vector of the neighboring block based on a first distance and a second distance to generate an interpolated motion vector, wherein the first distance is a distance between a reference picture of the 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; predicting a motion vector of the current block based on the interpolated motion vector to generate a predicted motion vector; and generating the motion vector of the current block by using the predicted motion vector. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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26. A decoding device, comprising:
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a predicted motion vector generator that interpolates a motion vector of a neighboring block based on a first distance and a second distance to generate an interpolated motion vector, wherein the first distance is a distance between a reference picture of the 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, and predicts a motion vector of the current block based on the interpolated motion vector to generate a predicted motion vector, wherein the neighboring block is in the current picture; and a first adder that generates a motion vector of the current block by using the predicted motion vector. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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33. An encoding method of an encoding device, comprising:
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obtaining a motion vector of a neighboring block of a current block, wherein the neighboring block is in a current picture; interpolating the motion vector of the neighboring block based on a first distance and a second distance to generate an interpolated motion vector, wherein the first distance is a distance between a reference picture of the 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; predicting a motion vector of the current block based on the interpolated motion vector to generate a predicted motion vector; and encoding a difference between a motion vector of the current block and the predicted motion vector. - View Dependent Claims (34, 35, 36, 37, 38)
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Specification