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Motion vector prediction method and devices

A motion vector prediction and motion vector technology, applied in the field of image processing, can solve problems such as low MV prediction efficiency

Active Publication Date: 2018-12-25
HUAWEI TECH CO LTD
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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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Embodiment Construction

[0053] The embodiment of the present application provides a motion vector prediction method. When the motion vector type of the motion vector of the current block is different from that of the motion vector of the adjacent block, it is used to add The motion vector is of the same type as the motion vector of the current block, so as to enrich the list of motion vector predictors and improve the prediction efficiency of the motion vector.

[0054] In order to enable those skilled in the art to better understand the solutions of the present application, the following will describe the embodiments of the present application with reference to the drawings in the embodiments of the present application.

[0055] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above drawings are used to distinguish similar objects, and not necessarily Used to describe a specific sequence or sequence. It is to be understood tha...

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Abstract

The embodiments of the invention disclose a motor vector prediction method and devices, which are used for determining a motion vector predicted value of a current block and improving prediction efficiency of a motion vector. The method of the embodiments of the invention includes the following steps: obtaining a reference frame corresponding to the motion vector of the current block; determininga motion vector type of the motion vector of the current block according to a reference frame type of the reference frame; obtaining a motion vector type of a first motion vector of at least one spatial adjacent prediction block when the at least one spatial adjacent prediction block of the current block is an inter-frame prediction block; and determining a second motion vector of adjacent pixel blocks according to decoding information of the spatial adjacent pixel blocks of the current block when the obtained motion vector type of the first motion vector is different form the motion vector type of the motion vector of the current block, and taking the second motion vector or a scaling value of the second motion vector as a candidate motion vector prediction value 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,...

Claims

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Application Information

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IPC IPC(8): H04N19/172H04N19/51H04N19/577
CPCH04N19/172H04N19/51H04N19/577H04N19/139H04N19/513H04N19/52H04N19/521H04N19/58H04N19/159H04N19/105H04N19/176
Inventor 毛珏虞露赵寅
Owner HUAWEI TECH CO LTD
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