作　　者： ; ; ; ;

机构地区： 宁波大学

出　　处： 《浙江大学学报（理学版）》 2005年第5期523-528,共6页

摘　　要： 网络异构性与传输可靠性是视频通信存在的两大问题.在视频编码中,分层编码用来解决网络传输异构性问题,多描述编码是解决传输可靠性的有效手段,而多描述视频分层编码则是二者的结合.在分层编码技术的基础上,结合基于宏块分裂的多描述编码,提出了基于宏块分裂的多描述视频分层编码.同时,还给出了基于行、列、帧分解的多描述视频分层编码方案,并对4种多描述分层编码方案进行了比较.实验结果表明,所提出的基于宏块分裂多描述分层编码方案在网络异构的适应性和传输可靠性上具有优越性. There are two problems in video communication. One is heterogeneity of network while the other is reliability of transmission. In video coding, layered coding is proposed to solve client heterogeneity problems, and multiple description coding is an effective method for robust transmission. Multiple description layered coding of video combines advantages of layered coding and multiple description coding. In this paper, a new multiple description layered coder of video is proposed, based on macroblock splitting technique, and it can be used for multicast systems. At the same time, other three multiple description layered coding schemes are also given, based on row-decomposi- tion, column-decomposition, or frame-decomposition, respectively. Experimental results show that the proposed multiple description video layered coding with macroblock splitting has advantages in adaptability of network heterogeneity and transmission reliability.

关 键 词： 视频通信 分层编码 多描述编码 多描述分层编码 宏块分裂

领　　域： [电子电信] [电子电信]