一种改进的无链表小波零树编码算法

An Improved Image Coding Method Based on Listless Zerotree Wavelet

提出一种对LZC算法作了改进的图像压缩编码方法。该方法在编解码的过程中都省去了链表,大大减少了内存消耗,降低了复杂度,提高了编码速度。实验结果表明,该算法在性能上比LZC算法提高约0.7dB左右,和SPIHT算法相比压缩性能近似但硬件更易实现。

It presents a zerotree coding method for gray images that uses no lists during encoding and decoding , improving the listless zerotree coding algorithm. Without lists, it reduces the memory requirements significantly, as well as the complexity in the encoding and decoding procedure, and enhances the coding speed by improving the zerotree coding process. Experimental results show that the PSNR results of improved LZC codec are up to about 0.7 dB higher than those of LZC, and the compression performance of improved LZC outperforms that of SPIHT in terms of hardware implementation.