A New Regions of Interest Video Coding Method Based on MPEG-4

ZHANG Fang; WU Cheng-ke; XIAO Song; WANG Yang-li

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A New Regions of Interest Video Coding Method Based on MPEG-4

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- A New Regions of Interest Video Coding Method Based on MPEG-4
- Acta Electronica Sinica Vol. 33, Issue 4, Pages: 634-637(2005)
- 作者机构：
  
  西安电子科技大学ISN国家重点实验室,陕西,西安,710071
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN919.8
- Published Online：25 April 2005，
  
  Published：2005
- 稿件说明：
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ZHANG Fang, WU Cheng-ke, XIAO Song, et al. A New Regions of Interest Video Coding Method Based on MPEG-4[J]. Acta Electronica Sinica, 2005, 33(4): 634-637.
DOI：

ZHANG Fang, WU Cheng-ke, XIAO Song, et al. A New Regions of Interest Video Coding Method Based on MPEG-4[J]. Acta Electronica Sinica, 2005, 33(4): 634-637. DOI：

摘要

本文提出了一种基于MPEG-4的感兴趣区域视频编码新方法.通过对感兴趣区边沿宏块采用强制帧内编码及宏块内预测编码时参考位置的自适应选择

该方法有效地抑制了数据噪声的扩散和传播.通过采用自适应宏块大小的运动估计/补偿算法

提高了感兴趣区特别是图像运动复杂的感兴趣区的编码效率及质量.在码率分配部分

本文方法通过计算不同区域的图像复杂性和能量

依据用户可设定的感兴趣权重因子不等重地分配可用码率资源.实验证明

本文方法较大程度改善了感兴趣区视频编码的压缩效率

提高了码率分配地灵活性和有效性.

Abstract

A new ROI video coding method is presented based on MPEG-4.In order to improve the video coding gain and the compression quality

the intra macroblock prediction

adaptive block-size transformation (ABT) and adaptive block-size motion estimation (ABME) are applied to ROI coding

then error propagation from other regions to ROI is prevented by encoding border macroblocks of the ROI in intra mode.Furthermore

content-based bit allocation strategy is proposed according to MPEG-4 rate-distortion model.Software simulation results show that the method can improve the image quality both objectively and subjectively compared to MPEG-4 and other ROI coding methods.

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