This algorithm first selects several codebook sizes for each mode and then calculates the quantization distortion of each codebook size to find a codebook size allocation with the least quantization distortion for a given sum of all the codebook.

In order to overcome the problem that the optimal backsight distribution of guns is hard to be applied,by valve-control principle,optimal backsight distribution principle and golden section searching arithmetic,this paper put forward a optimal arithmetic of destroy firing\'s backsight distribution when the formation-guns fire to the shore.