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计算机工程 ›› 2007, Vol. 33 ›› Issue (11): 219-221. doi: 10.3969/j.issn.1000-3428.2007.11.079

• 多媒体技术及应用 • 上一篇    下一篇

视频会议系统中视频混合器的二次编码优化

刘紫燕,陈霖周廷   

  1. (贵州大学电子科学与信息技术学院,贵阳 550003)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-06-05 发布日期:2007-06-05

Optimization Design of Video Mixer During Re-encoding in Videoconference System

LIU Ziyan, CHEN Linzhouting   

  1. (College of Electronics Science and Information Technology, Guizhou University, Guiyang 550003)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-06-05 Published:2007-06-05

摘要: 介绍了视频会议系统中构造多路视频混合器的基本原理,提出了一种在视频会议系统中视频混合器对混合图像进行二次编码时重新利用原始码流信息的方法,减少了运算量,提高了编码效率。

关键词: 视频会议, 视频混合器, 运动估计, 运动矢量

Abstract: This paper introduces the principium of constructing video mixer in video conference system. In re-encoding the mixing picture in video mixer, a method of using the useful information drawn from already compressed bitstream is proposed, which can reduce the calculation and improve the encoding efficiency greatly.

Key words: Video conference, Video mixer, Motion estimation, Motion vector

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