Image compression using wavelet is very attractive . In this paper

lattice quantization and run-length code are integrated to effciently encode wavelet coefficienis

in which hybrid entropy code is used to en-code non-zero lattice points

and run-length code is used to encode zero lattice points resulting in high compres-sion.The coder’ s output bit rate can be flexibly controlled.The operational complexity is very low due to the fastalgorithm of lattice quantization.The coder’s performance is superior to conventional DCF

pure lattice quantiza-tion

and is competitive with EZW algorithm.