Experimental results show that the model can achieve higher psnr than 3d - escot . while at the same time keeping all the advantages of 3d - escot 实验结果表明：利用这种模型获得的psnr高于3d - escot模型。同时也具有3d - escot模型的优良性质。
2.
Experimental results also show that for every quantization width , every scale in time and every scale in space , 3d - pcw not only achieves higher compression rate but also costs less time than 3d - escot 实验数据也表明，对于每个量化幅度和每个空间及时间分辨率， 3d - pcw不仅获得了比3d - escot更高的压缩比，而且算法执行所需要的时间也更少。
3.
Inspired by typical coding schemes such as ezw , spiht , ebcot , 3d - iezw , 3d - spiht and 3d - escot , a new context model of wavelet coefficients is proposed , which make use of partial order , self - similarity between subbands of wavelet coefficients and the correlation of neighboring wavelet coefficients 受ezw 、 spiht 、 ebcot模型及3d - ezw 、 3d - spiht 、 3d - escot模型的启发，本文综合利用小波系数不同子带间的自相似性、偏序性和同子带内相邻系数的相关性，提出了一种新的三维小波嵌入编码上下文模型3d - pem 。
4.
Since 3d - pcw tackles the coefficients as a whole , the context of a coefficient is computed only once , and the coefficient is encoded only once . but in 3d - escot the context has to be computed once and the coefficent has to be encoded once on every bit plane . therefore , 3d - pcw has much lower time complexity than 3d - escot 由于3d - pcw把系数作为一个整体进行编码，每个系数只需要计算一次上下文，并编码一次，而ebcot的扩展3d - escot每个系数在每个平面上都需要计算一次上下文并编码一次，因而3d - pcw比3d - escot算法的时间复杂度更低。
