The comparison of quality parameters is made with block adaptive quantization(BAQ),block adaptive vector quantization(BAVQ) and wavelet packets transform block adaptive quantization(WPT-BAQ).

• 并与块自适应量化（BAQ）、块自适应矢量量化（BAVQ）以及小波包变换块自适应量化（WPT-BAQ）方法进行了性能比较。