计算机应用 ›› 2012, Vol. 32 ›› Issue (04): 1144-1146.DOI: 10.3724/SP.J.1087.2012.01144

• 图形图像技术 • 上一篇    下一篇

新的基于分裂层树编码图像的传输方案

付垚,刘庆利   

  1. 沈阳理工大学 信息科学与工程学院,沈阳 110159
  • 收稿日期:2011-10-10 修回日期:2011-11-17 发布日期:2012-04-20 出版日期:2012-04-01
  • 通讯作者: 付垚
  • 作者简介:付垚(1978-),女,山东德州人,工程师,主要研究方向:图像处理;刘庆利(1981-),男,辽宁本溪人,博士研究生,主要研究方向:图像处理与传输。

New scheme for image transmission based on SPIHT

FU Yao,LIU Qing-li   

  1. School of Information Science and Engineering, Shenyang Ligong University, Shenyang Liaonning 110159, China
  • Received:2011-10-10 Revised:2011-11-17 Online:2012-04-20 Published:2012-04-01
  • Contact: FU Yao

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10dB。

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

Abstract: 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 10dB.

Key words: Set Partitioning In Hierarchical Tree (SPIHT), image wireless transmission, optimum frame length, throughput, resisted error