对码本模型中码字结构的改进

Improvement on Codeword Structure in Codebook Model

针对码本结构,提出一种简化算法.该算法通过将码字元组中判断该码字是否冗余的元素——最大未使用时间改为由元组的其他变量直接计算而不存储在码字中,去除了该变量所占用的空间,将6元组替换为5元组.实验结果表明,该改进不会对运动目标检测增加额外计算,准确性和实时性不受影响,并可减少码本模型占用的内存.

The codeword space was reduced according to calculating the longest interval so that codeword is never recurred by other variable in tuple,and the interval is not stored in codeword,thus 6-tuple based codeword is replaced by 5-tuple.The experimental result shows that the new codebook model is as fast and accurate as the original model.Moreover,the memory space demanded is reduced.