our results are applicable for both multi stage supply chain including a supplier and that not including any suppliers 文中的結(jié)果既適用于包括原材料供應商的多階段供應鏈,也適用于不包括原材料供應商的兩階段或者三階段的供應鏈。
the new algorithm has three characters : first is that the new algorithm is on the basis of super frame which include 3 continuous simple frames in melp algorithm, the algorithm deal with parameters of a super frame by the mode of the super frame . secondly, two algorithms are introduced for improving vector quantization quality of line spectral frequency ( lsf ) parameter . one is swithed-adaptive inter-frame vector prediction ( sivp ), which can get rid of the correlation between neighboring frames effectively, the other is joint codebook optimization for multi stage vector quantization ( jco-msvq ), which can improve performance of codebook 第二是在制作線譜對參數(shù)(lsf)矢量量化碼本時,引入了目前提高lsf碼本性能的兩個方法:在利用重點幀對非重點幀作預測時,借鑒自適應幀間矢量量化(sivp)去除相關性算法的優(yōu)點,提出了以固定矩陣去除相關性的方法,有效的控制了預測后殘差的動態(tài)范圍,提高了對殘差矢量量化的精度;采用聯(lián)合碼本優(yōu)化多級矢量量化算法(jco-msvq),改良多級矢量量化碼本的性能。