%0 Journal Article
%T The Optimal Gain Filter of LD-CELP<br>低延迟码激励语音编码算法的最佳增益滤波器
%A Zhang Qi-gui
%A Zhang Gang
%A <br>张起贵
%A 张 刚
%J 电子与信息学报
%D 2006
%I 
%X The recommendation G.728 depends on the Levinson-Durbin algorithm to update gain filter coefficients. In this topic, it is replaced by three different methods which are the weighted L-S recursive filter, the finite memory recursive filter and the BP neural network, respectively. Using these three gain filter the speech coding effect is all better than the G.728. The weighted L-S algorithm has the best result. Its average segment SNR is higher than the G.728 about 0.76dB. It is also used to evaluate the case that excitation vector is 16 and 20 samples respectively; the weighted L-S algorithm has similarly the best result.
%K G
%K 728<br>增益滤波器
%K 加权L-S
%K 有限记忆
%K 信噪比估计
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=1319827C0C74AAE8D654BEA21B7F54D3&jid=EFC0377B03BD8D0EF4BBB548AC5F739A&aid=C951C3F11715B36D&yid=37904DC365DD7266&vid=D3E34374A0D77D7F&iid=5D311CA918CA9A03&sid=2838795948C22802&eid=69E0A22DA7775B50&journal_id=1009-5896&journal_name=电子与信息学报&referenced_num=0&reference_num=5