The experimental results shows that finite-word-length effect is negligible in JPEG2000 coding system and speedup of the wavelet transforms can dramatically raise the coding speed.

• 实验的结果显示在JPEG2000的影像压缩系统中由于定点运算所造成的小数部分之有限位元长度的影响是可以忽略的，并且加速离散小波转换的运算速度可以大大地提升影像压缩的速度。