JPEG2000图像的分层特性要求采用不等差错保护方法以实现高效传输,本文提出了一种新型的不等差错保护方法,对不同位平面采用不同码率的抗差错算术码进行编码.与基于信道编码的不等差错保护方法相比,该方法保持了压缩码流的结构,避免了复杂的信道成帧过程.与已有的基于抗差错算术码的等差错保护方法相比,该方法提高了传输图像的质量. The hierarchical features of JPEG2000 images require unequal error protection to realize efficient transmission. In this paper, a new method of unequal error protection is proposed, which encodes error-resistant arithmetic codes with different bit-rates for different bit-planes. Compared with the existing method of equal error protection based on anti-error arithmetic code, the proposed method preserves the structure of compressed code stream and avoids complicated channel framing process The quality of the transmitted image.