語音可懂度客觀評(píng)價(jià)策略的研究
[Abstract]:In the background of the information age, speech is the most direct form of information transfer and exchange in people's daily life. In real life, most of the voice often accompanied by noise, making people feel comfortable. It is difficult to understand the sound of the hearing impaired. For this, how to separate the noise from the signal and improve the intelligibility. And how to evaluate intelligibility has become an important problem. At present, the proposed Ideal Binary Mask (IBM) technology provides hope for the evaluation of speech intelligibility under the noise background. Recent studies have shown that the importance of each time frequency unit to the speech intelligibility is related to the speech content. The time frequency unit is divided into noise, and the time frequency unit is divided into noise. The experimental results show that the importance of the time frequency unit on speech intelligibility in each speech is related to the phonetic loudness of the target speech in.2008 years. Li and Loizou studies show that when the input signal-to-noise ratio is in -5dB, the error of false alarm is greater than that of the loss and error on the speech intelligibility. The mixed SNR is expanded to study the effect of two masking errors on speech intelligibility under different input mixed signal to noise ratio. In this paper, it is proved that when the mixed SNR is below 0dB, false alarm error has greater influence on speech intelligibility than loss error. The study of ideal two value masking is based on such a hypothesis. The contribution of a speech separation unit to the overall intelligibility of speech is the same, but it does not change the IBM structure. Considering the effect of the two masking errors on the degree of speech intelligibility and the effect of the IBM structure on the intelligibility of speech, this paper proposes a weighted control method for the loss and misrepresentation errors, and combines the changes of the IBM structure. A better indicator to evaluate the intelligibility of speech.
【學(xué)位授予單位】:內(nèi)蒙古大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TN912.3
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