语音识别中处理lattice的工具，可以进行后验概率计算、剪枝等处理-Speech recognition processing lattice tools that can be posterior probability calculation, pruning and other processing

Probability of having music for time i to DETECT_SIZE-1 (and speech before). pmusic[0] is the probability that all frames in the window are music.

In the fields of computational linguistics and probability, an n-gram is a contiguous sequence of n items a given sequence of text or speech. The items can be phonemes, syllables, letters, words or base pairs according to the application. The n-grams