【摘要】 JPEG2000标准是最新的图像压缩标准.首先分析了JPEG2000标准中的抗误码方法,进而提出了一个分析模型来预测在无线信道上传输的JPEG2000编码图像重建质量,并通过仿真加以验证.此分析模型可用来在无线基站上为JPEG2000编码图像的传输设计高效的非均匀误码保护方案.基于该分析模型,定义了一个效用函数来在图像重建质量和传输开销之间进行折中,以决定采用何种非均匀误码保护方案,达到最佳的传输质量.更多还原

【Abstract】 JPEG2000 is a new image standard. In this paper, the performance of error resilience tools in JPEG2000 is analyzed at first, then an analytical model to estimate the quality of JPEG2000 encoded image transmitted over wireless channel is presented. The effectiveness of the analytical model is validated by simulation results. Furthermore, analytical model is utilized by the base station to design efficient unequally error protection (UEP) schemas for JPEG2000 image transmission. With the analytical model, a utility function is defined to make a tradeoff between the image quality and the cost for transmitting the image over wireless channel, and chose which kind of UEP schemas to employ to reach the optimal image transmission quality.更多还原