A method and device for motion vector prediction

Abstract

The embodiment of the present application discloses a motion vector prediction method and device, which are used to determine a motion vector prediction value of a current block and improve motion vector prediction efficiency. The method in this embodiment of the present application includes: obtaining a reference frame corresponding to the motion vector of the current block; determining the motion vector type of the motion vector of the current block according to the reference frame type of the reference frame; when at least one space of the current block When the adjacent prediction block is an inter prediction block, obtaining the motion vector type of the first motion vector of the at least one spatially adjacent prediction block; when the obtained motion vector type of the first motion vector is the same as that of the current block When the motion vector types of the motion vectors are all different, the second motion vector of the adjacent pixel block is determined according to the decoding information of the spatial adjacent pixel block of the current block, and the second motion vector or the first The scaled value of the two motion vectors is used as the candidate motion vector predictor of the current block.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular to a method and device for motion vector prediction. Background technique [0002] The inter-frame coding of the high efficiency video coding (HEVC) standard adopts the motion vector (motion vector, MV) predictive coding technology to reduce the amount of data transmitting MV-related information and improve coding efficiency. The inter-frame predictive coding of the HEVC standard is subdivided into two modes: inter-frame (inter) mode and fusion (merge) / skip (skip) mode. When the current block adopts the inter mode, the reference frame index (reference index), the motion vector predictor index (motion vector predictor index, MVP index) and the motion vector residual value (motion vector difference, MVD) of the current block MV are identified in the code stream ); the reference frame pointed to by the current block MV is determined by the reference frame index,...

AI Technical Summary

Problems solved by technology

For inter mode, if the MV type of the adjacent block is different from the MV type of the current block (i.e. one is a long-term motion vector and the other is a short-term motion vector), this MV will not be added to the MVP list, resulting in zero motion vectors in the MVP list (zero motion vector, Zero MV) increases, MV prediction is inefficient

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