MP3压缩域中语音分割的研究与实现

针对说话人改变点检测问题，在MP3格式下用改进型BIC算法实现了多话者改变点的检测。根据非压缩域中MFCC的求取过程，提出了一种在压缩域MP3格式下利用MDCT系数计算MFCC特征参数的新方法。在此基础上，使用改进型BIC改变点检测算法检测说话人改变点。实验表明在相同的BIC检测算法下，利用在压缩域中提取的MFCC特征参数进行语音分割，可以得到和非压缩域相似的分割精确度。

Research and realization of speech segmentation in MP3 compressed domain

This article proposed an approach for detecting the voice change of speakers by employing improved Bayesian Information Criterion (BIC) algorithm in MPEG1-layer3 (MP3) compressed domain. According to the process of MFCC calculation in raw audio, a new Mel-Frequency Cepstral Coefficients (MFCC) algorithm by utilizing Modified Discrete Cosine Transform (MDCT) coefficient in MP3 domain was presented. Based on these coefficients, the improved BIC algorithm was employed to decide which point was the voice change point of speakers. The experimental results show that using the MFCC coefficients extracted in MP3 domain for speech segmentation, similar segmentation precision can be obtained as that in uncompressed domain.