An Adaptive Multi-Pattern Motion Vector Refinement Algorithm for Video Transcoder

SHEN Xiao-dong; ZHANG Tai-yi; LI Xiao-he

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An Adaptive Multi-Pattern Motion Vector Refinement Algorithm for Video Transcoder

更新时间：2026-09-04

- An Adaptive Multi-Pattern Motion Vector Refinement Algorithm for Video Transcoder
- Vol. 27, Issue 9, Pages: 24-28(2010)
- 作者机构：
  
  西安交通大学电子与信息工程学院,陕西,西安,710049
- 作者简介：
- 基金信息：
- DOI：
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- Published：2010
- 稿件说明：
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沈晓东, 张太镒, 李小和. 视频转码中运动矢量自适应多模式精炼算法[J]. 微电子学与计算机, 2010, 27(9): 24-28.

SHEN Xiao-dong, ZHANG Tai-yi, LI Xiao-he. An Adaptive Multi-Pattern Motion Vector Refinement Algorithm for Video Transcoder[J]. 2010, 27(9): 24-28.
沈晓东, 张太镒, 李小和. 视频转码中运动矢量自适应多模式精炼算法[J]. 微电子学与计算机, 2010, 27(9): 24-28. DOI：

SHEN Xiao-dong, ZHANG Tai-yi, LI Xiao-he. An Adaptive Multi-Pattern Motion Vector Refinement Algorithm for Video Transcoder[J]. 2010, 27(9): 24-28. DOI：

摘要

针对视频转码中运动矢量重估计精度不高的问题

提出了一种运动矢量自适应多模式精炼(AMPR)算法.该算法首先利用输入码流中运动矢量的相位和幅值信息构建了视频局部区域活动性模型

通过此模型自适应确定精炼窗口的大小

然后在菱形搜索算法(DS)和水平垂直搜索算法(HAVS)的基础上

给出了多模式搜索策略.仿真实验表明

该算法取得接近于全搜索算法的视频质量

并有效地降低了计算复杂度.

Abstract

An adaptive multi-pattern refinement algorithm for motion vector in video transcoding is presented.Using the consistency of angle and amplitude of intensity of local motion vectors

a motion activity model is constructed

so the search range of the macroblock is confirmed adaptively using the activity model.Then

a multi-pattern refinement strategy based on the diamond search and horizontal and vertical search is proposed.Experimental results show that the proposed method reduces the computation complexity significantly without degrading the quality of video transcoder.

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