Since JPEG does not perform well at high compression ratio

many algorithms have been proposed recently to get better performance. One of the best is EZDCT[1

2]. But it still can not over come the inherent wackiness of DCT based algorithm—blocking artifacts. In order to solve the problem

an algorithm

namely the embedded zero tree for layered DCT(EZLDCT) is proposed in this paper. Compared with EZDCT

it can reduce blocking artifacts efficiently and gain better image quality for complex images

such as "Barbara" and "Goldhill" etc.

at the same compression ratio.