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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。
In view of the limitation of the traditional method in speech bi-fundamental frequency detection, this paper presents a method of Chinese double fundamental frequency detection (DDPM). This method uses the quasi-periodicity of mixed Chinese speech in short-time frame, and obtains the candidate of double-pitch frequency in each frame by searching. According to the pronunciation of human under normal circumstances, the method does not produce the mutation of fundamental frequency in adjacent frames Features, to achieve a dual-frequency detection. Using this method, we tested the various combinations of Chinese tonal monosyllabic syllables under pure and noisy conditions, and the detection results were very satisfactory. The new method can also be applied directly to the detection of continuous speech bistatic frequencies.