Method and device for obtaining predicted value of motion vector

Abstract

The invention discloses a method and device for obtaining a predicted value of a motion vector. The technical scheme provided by the embodiment of the invention is as follows: the method comprises the following steps of: obtaining position coordinates and a motion vector of more than one encoded/decoded block neighboring a current block; obtaining association parameters of the motion vector and the position coordinates in accordance with the preset congruent relationship between the motion vector and the position coordinates, and the position coordinates and the motion vector of more than one encoded/decoded block; and obtaining a predicted value of the motion vector of the current block in accordance with the preset congruent relationship between the motion vector and the position coordinates, and the position coordinates of the current block and the association parameters of the motion vector and the motion vector. The embodiment disclosed by the invention can be applied to the video image encoding and decoding process, such as H. 264/AVC and the like.

Description

technical field [0001] The present invention relates to video image encoding technology, in particular to a method and device for obtaining a prediction value of a motion vector. Background technique [0002] At present, video images are mainly encoded using motion-compensated inter-frame prediction technology. When encoding the current block in the current frame, the encoder first obtains the predicted block corresponding to the current block from the encoded video image frame, and then calculates the residual value between the predicted block and the current block, and the residual value Encoding is performed, and the encoded residual value and the motion vector of the current block are written into the code stream and sent to the decoding end; the decoding end decodes the residual value and motion vector from the received code stream, according to the The motion vector obtains a prediction block corresponding to the current block, and the current block is decoded and rec...

AI Technical Summary

Problems solved by technology

[0005] However, if the object in the scene is non-rigid (the object is deformed, for example: when the object moves close to or away from the camera), the method of obtaining the predicted value of the motion vector of the current block provided by the prior art cannot be more accurately Obtain the predicted value of the motion vector, which causes the problem of low coding efficiency

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