摘要
提出了一种新的基于分裂层树编码(SPIHT)的实时图像传输方案。该方案首先将图像数据进行小波变换,然后将变换后的小波系数进行合理分块并分别采用SPIHT编码,以防止在无线信道传输中产生误码扩散。最后为了提高重构图像的恢复质量,提取每一个块中最高一级的小波系数数据进行重复传输,同时采用最优的帧长,提高图像传输系统的吞吐量。理论分析和仿真结果表明,提出的方案比传统的基于SPIHT算法的图像传输方案具有更高的抗误码特性,重构图像的峰值信噪比提高约10 dB。
In this paper,a new real-time image transmission scheme based on Set Partitioning In Hierarchical Tree（SPIHT） was proposed.Firstly,the image data needed to be transformed by wavelet.Secondly,in order to resist error pervasion when image was transmitted,the wavelet coefficients were separated into small blocks and encoded by SPIHT.Finally,in order to improve the quality of the restructured image,the wavelet coefficients of the highest level in every block were transmitted repeatedly.In order to improve the throughput of the image transmission system,the optimum frame length was proposed.Both theoretical demonstration and simulation results here have validated that the proposed scheme provides stronger error resilience than traditional scheme based on SPIHT,and can improve the peak signal to noise ratio of the restructured image about 10 dB.
出处
《计算机应用》
CSCD
北大核心
2012年第4期1144-1146,共3页
journal of Computer Applications
关键词
分裂层树编码
图像无线传输
最优帧长
吞吐量
抗误码
Set Partitioning In Hierarchical Tree（SPIHT）
image wireless transmission
optimum frame length
throughput
resisted error
