Abstract: The bit plane coding and decoding in JPEG2000is a computational intensive and complicated process.In this paper,we propose an improved implementation of the coding-decoding algorithm by chiefly reducing the involved redundant operations.By adopting special memory format and state information registers,an efficient memory organization method is presented,whose main characteristics include the simplification of the coding-decoding,pipelined data processing,and a significant reduction of read-write memory accesses.The improved implementation has been integrated in a digital camera chip manufactured by 0.25 μm CMOS technology.It is shown that this improved implementation can give a highly efficient bit plane codec with less memory requirement and low computational complexity.