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AssigneeNippon Telegraph and Telephone Corporation
InventorsAtsushi Shimizu, Hirohisa Jozawa, Kazuto Kamikura, Hiroshi Watanabe, Atsushi Sagata, Seishi Takamura
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A motion vector predictive encoding method, a motion vector decoding method, a predictive encoding apparatus, a decoding apparatuses, and storage media storing motion vector predictive encoding and decoding programs are provided, thereby reducing the amount of generated code with respect to the motion vector, and improving the efficiency of the motion-vector prediction. If the motion-compensating mode of the target small block to be encoded is the global motion compensation, the encoding mode of an already-encoded small block is the interframe coding mode, and the motion-compensating mode of the already-encoded small block is the global motion compensation, then the motion vector of the translational motion model is determined for each pixel of the already-encoded small block, based on the global motion vector (steps S1-S5). Next, the representative motion vector is calculated as the predicted vector, based on the motion vector of each pixel of the already-encoded small block (step S6). Finally, the prediction error is calculated for each component of the motion vector and each prediction error is encoded (steps S7 and S8).
1-96. (canceled)
A motion vector predictive encoding method in which a target frame to be encoded is divided into target small blocks and a motion-compensating method is applied to each target small block to be encoded, a motion vector of a target small block is predicted and calculated (S7) based on a motion vector of already-encoded small blocks to produce a predicted vector, and a prediction error of the motion vector is encoded,
A motion vector decoding method for decoding a motion vector which was encoded using a motion vector predictive encoding method, in which a target frame to be encoded is divided into target small blocks and a motion-compensating method is applied to each target small block to be encoded, a motion vector of the target small block is predicted and calculated (S17) based on a motion vector of already-encoded small blocks to produce a predicted vector and a prediction error of the motion vector is encoded,
A computer-readable storage medium storing a motion vector predictive encoding program for executing a motion vector predictive encoding program in which a target frame to be encoded is divided into small blocks and a motion-compensating method is applied to each target small block to be encoded, a motion vector of a target small block is predicted and calculated based on a motion vector of already-encoded small blocks to produce a predicted vector, and prediction error of the motion vector is encoded,
A computer-readable storage medium storing a motion vector decoding program for decoding the motion vector which was encoded by executing a motion vector predictive encoding program, in which a target frame to be encoded is divided into target small blocks and a motion-compensating method is applied to each target small block to be encoded, a motion vector of the target small block is predicted and calculated based on a motion vector of already-encoded small blocks to produce a predicted vector, and a prediction error of the motion vector is encoded,
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