For the sake of accelerating the coding process of JPEG2000 and avoiding coding useless codes, a pre-coding Rate-distortion Optimized (RDO) rate allocation algorithm was proposed.

• 摘要针对JPEG2000推荐的码率分配算法导致的计算冗余多、编码速度慢并且编码缓存大的不足，本文提出一种编码前最优分配码率的方法以提高JPEG2000的编码速度。