摘要
针对多媒体无线通信的特点,提出了一种结合自适应纠错技术与联合优化技术的新策略,充分考虑了联合编码的自适应纠错特性和联合优化特性,分析了优化的信源编码算法和优化的信道编码算法。实验仿真结果表明,该方法能够使图像数据在高码率下达到较好的抗噪性能。
This paper presents a joint source-channel coding scheme based on SPIHT (Set partitioning in Hierarchical trees)algorithm and LDPC (Lower Density Parity Check) codeso Taking full advantage of the characteristics of SPIHT algorithm and LDPC Codeso The scheme of UEP (unequal error protection) is adopted in channel coding based on compressed data according to the importance for reconstructiono The results show that the proposed scheme can make a better balance between bit error rate and code rate.
出处
《电视技术》
北大核心
2005年第9期13-15,18,共4页
Video Engineering
基金
国家自然科学基金资助项目(69772015)