Motion vector self-selection method for image stream file compression

A technology of motion vector and file compression, which is applied in the field of image processing, can solve the problems of low-reliability coding block search center, high coding efficiency, and does not take into account the reliability of motion vectors in coding blocks, so as to reduce search complexity and improve The effect of accuracy
CN113453016AActive Publication Date: 2021-09-28KANGDA INTERCONTINENTAL MEDICAL EQUIP CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
KANGDA INTERCONTINENTAL MEDICAL EQUIP CO LTD
Publication Date
2021-09-28

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Abstract

The invention discloses a motion vector self-selection method for image stream file compression, which relates to the technical field of image processing and mainly comprises the following steps: acquiring a candidate list of motion vectors of a target coding block through an AMVP technology; based on a corresponding relation between a time candidate motion vector and a space candidate motion vector and a difference relation between a first angular motion vector and a third angular motion vector in the candidate list, selecting a predicted motion vector, or selecting the predicted motion vector after screening the motion vectors added in the candidate list; and performing motion estimation according to the predicted motion vector, and performing compression processing on an image stream file according to an estimation result. According to the invention, the direction deviation is judged by utilizing the motion vector of the edge adjacent coding block, so that the angular motion vector close to the motion direction deviation is selected and added into the candidate list, and the confidence coefficient of the finally selected predicted motion vector is improved.
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Description

technical field

[0001] The invention relates to the technical field of image processing, in particular to a motion vector self-selection method for image stream file compression. Background technique

[0002] Compared with H.264 / AVC, a highly compressed digital video encoder standard, in order to further improve coding efficiency, new coding tools are introduced in H.265 / HEVC, such as the maximum The size is expanded from 16Γ—16 to 64Γ—64, the intra-frame coding prediction mode is increased from 9 to 35, and the prediction of the motion vector (MotionVector, MV for short) of the current coding block adopts Advanced Motion Vector Prediction (AMVP for short). ) technology, etc. Through in-depth research, it is found that the number of candidate MVs selected by the AMVP technology used in H.265 / HEVC is small, and the prediction motion vector (Prediction Motion Vector, PMV for short) of the current coding block can be obtained from the adjacent coding block (with the current The...

Claims

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