本文選題：高速率原理 + 正弦編碼��； 參考：《電子學(xué)報(bào)》2014年04期

【摘要】：為實(shí)現(xiàn)音頻信號(hào)的低速率編碼,提出一種正弦參數(shù)量化的新方案.該方案利用人耳掩蔽效應(yīng)和實(shí)時(shí)參數(shù)統(tǒng)計(jì)特性,基于高速率原理建立并顯式求解率失真優(yōu)化問(wèn)題,得到具有解析形式的參數(shù)量化器,實(shí)現(xiàn)了在正弦分量間和正弦參數(shù)間動(dòng)態(tài)分配編碼比特.本量化方案無(wú)迭代運(yùn)算過(guò)程,適合實(shí)時(shí)低速率音頻編碼應(yīng)用.與經(jīng)典方法比較,平均比特速率每正弦減少約17%.當(dāng)速率大于15bit/正弦,重建信號(hào)的感覺(jué)失真小于球形量化方案.
[Abstract]:In order to realize the low rate coding of audio signal, a new scheme of sinusoidal parameter quantization is proposed. Based on the high rate principle and the real time parameter statistics, the method is used to solve the rate-distortion optimization problem, and a parameter quantizer with analytical form is obtained. Dynamic allocation of coding bits between sinusoidal components and sinusoidal parameters is realized. This quantization scheme has no iterative operation and is suitable for real-time low-rate audio coding applications. Compared with the classical method, the average bit rate decreases by about 17 times per sinusoidal rate. When the rate is greater than the 15bit/ sinusoidal, the sensory distortion of the reconstructed signal is less than that of the spherical quantization scheme.
【作者單位】： 北京石油化工學(xué)院信息工程學(xué)院;
【基金】：北京市教育委員會(huì)科技計(jì)劃(No.KM201310017009)
【分類號(hào)】：TN912.3

【相似文獻(xiàn)】

相關(guān)期刊論文 前1條

1 王嵩;;正弦參數(shù)自適應(yīng)聯(lián)合量化[J];電子學(xué)報(bào);2014年04期

，

本文編號(hào)：1890225