小波变换码中滤波器的选择

On the Choice of Filter Banks in Wavelet Transform Coding

在本文中，我们从广义编码增益、分解重构性能与对误差的敏感性、编码性能与主观质量三个方面对双正交小波12／4、9／7与9／3进行比较，得出：双正交小波12／4比9／7与9／3更适合于小波图像压缩，特别是在高保真压缩中；在低比特率编码中，双正交小波12／4与9／7相差不大。

In this paper, we compare the biorthogonal wavelet filters 12/4、 9/7 and 9/3 in terms of generalized coding gain, performance of decomposition and reconstruction and sensitivity to noise, coding performance and visual quality. The conclusion is that biorthogonal wavelet tilter 12/4 is more suitable to wavelet image compression than 9/7 and 9/3, especially in high fidelity compression; in low bit-rate coding, there is almost no diftbrence between 12/4 and 9/7.