摘要
为了提高图像在不可靠网络传输中的鲁棒性,提出一种基于提升小波的两阶段多描述编码。基本思想是通过描述生成算法形成描述,分别对每一个描述进行插值;对描述进行提升小波变换和EZW编码;将编码之后的数据作为第一阶段的数据在信道传输。第二阶段的数据由第一阶段的数据解码和提升小波系数做差分形成,然后进行EZW编码在信道传输。实验结果表明,该方案能够达到较好的冗余控制,提高图像的重构效果。
For improving the robust of image during unreliable network transmitting,we proposed a lifting wavelet-based two-stage multiple description encoding. The basic idea was: to form the descriptions by description generation algorithm,and to interpolate every description separately; to apply the lifting wavelet transform and zero tree wavelet( EZW) encoding on descriptions; and to use the encoded data as the first stage data and to transmit them in the channel. The second data were formed by lifting wavelet coefficients subtracting the decoded data in first stage,then made EZW encoding and transmitted in the channel. Experimental results showed that the proposed algorithm could achieve better control on the redundancy and improve the quality of image restoration.
出处
《计算机应用与软件》
CSCD
2016年第4期192-195,共4页
Computer Applications and Software
基金
国家青年自然科学基金项目(61302182)
关键词
提升小波
两阶段结构
描述生成
多描述
图像编码
冗余
Lifting wavelet transform
Two-stage structure
Description generation
Multiple description
Image coding
Redundancy