本文選題：基于IP的語音傳輸(Vo + IP)　； 參考：《重慶郵電大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年02期

【摘要】：為了能夠更加準(zhǔn)確地評價(jià)語音包丟失對基于IP的語音傳輸(voice over internet protocol,Vo IP)的語音質(zhì)量的損傷,對ITU-T G.107建議書提出的語音質(zhì)量預(yù)測模型E-Model中計(jì)算丟包與編碼造成的損傷Ie-eff的方法作出改進(jìn),在綜合考慮語音包的內(nèi)部特性和存在突發(fā)連續(xù)丟包情況后,提出利用在固定語音長度下,語音實(shí)際損失時間Tloss來衡量語音包丟失造成的語音損傷。仿真結(jié)果表明,相比原有模型,改進(jìn)后的模型得到的語音質(zhì)量評分同主觀語音質(zhì)量評估方法(perceptual evaluation of speech quality,PESQ)評分相比,皮爾森相關(guān)系數(shù)平均提高了0.045 8,均方根誤差平均降低了0.053 4,改進(jìn)后的E-Model模型在評價(jià)語音質(zhì)量時與PESQ更具有一致性,可以更為準(zhǔn)確地預(yù)測Vo IP通信的語音質(zhì)量。
[Abstract]:In order to evaluate more accurately the damage of voice packet loss to the voice quality of (voice over internet protocol Vo IP based on IP, This paper improves the method of calculating the damage Ie-eff caused by packet loss and coding in the speech quality prediction model E-Model proposed by ITU-T G.107 recommendation. After considering the internal characteristics of speech packet and the existence of burst continuous packet loss, In this paper, the actual loss time (Tloss) is used to measure the speech damage caused by the loss of the speech packet under the fixed speech length. The simulation results show that compared with the original model, the speech quality score obtained by the improved model is compared with the subjective speech quality assessment method (perceptual evaluation of speech quality and PESQ). The Pearson correlation coefficient is increased by 0.045 on average, and the root mean square error is reduced by 0.053 4. The improved E-Model model is more consistent with PESQ in evaluating speech quality, and can more accurately predict the speech quality of Vo IP communication.
【作者單位】： 東北電力大學(xué)信息工程學(xué)院;國網(wǎng)內(nèi)蒙古東部電力有限公司信息通信分公司;
【分類號】：TN912.3

【相似文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 蔡鍇;基于E-Model的語音質(zhì)量評估模型研究與應(yīng)用實(shí)踐[D];北京郵電大學(xué);2012年

，

本文編號：2108495