汉语普通话双基频检测

鉴于传统方法在语音双基频检测方面的局限性,本文提出了汉语双基频检测(DDPM)的方法。该方法利用混合汉语语音在短时帧之内的准周期性,经搜索得到每一帧内的双基频候选点,再根据正常情况下人的发音在相邻帧内基频不产生突变的特点,实现了双基频检测。应用此方法,在纯净与加噪的情形下,对汉语四种声调单音节的各种组合分别进行了检测实验,检测效果十分理想。新方法也可以直接应用到连续语音双基频的检测。

Detection of double pitches for Chinese Putonghua

In view of the limitation of conventional methods,a DDPM method(detection of double pitches for Chinese Putonghua) is designed especially for detecting double pitches in Chinese Putonghua.It utilizes the quasi-periodicity in a short time frame of speech,and gets candidate pitches in every frame by using a searching algorithm.The double pitch contours are then determined from these candidates by virtue of the fact that pitch should change rather smoothly in consecutive frames.With the new method,a systematical investigation is made for detecting double pitches from various combinations of the four tones of Chinese Putonghua,both clean and contaminated with noise,achieving results that are quite satisfactory.The proposed method,of course,could be extended to general speech even continuous ones.