A Novel Frame Error Concealment Scheme Based on Gain Control for TCX Audio Codec  

作　　者：XIANG Kai HU Ruimin 

机构地区：[1]School of Computer,Wuhan University [2]School of Information Management,Hubei University of Economics

出　　处：《Wuhan University Journal of Natural Sciences》2016年第2期133-138,共6页武汉大学学报（自然科学英文版）

基　　金：Supported by the National High Technology Research and Development Program of China(863 Program)(2015AA016306);the Foundation of Outstanding Middle-aged and Young Scientific and Technological Innovation Team Program of Department of Education of Hubei Province(T201516);the Foundation of Department of Education of Hubei Province(Q20132207)

摘　　要：A novel frame error concealment scheme is proposed to improve the decoded audio quality of the receiver for transform coded excitation（TCX）audio codec.This scheme,which is a gain control approach based on the stability of linear predictive coding（LPC）filter,predicts the lost frames by utilizing the linear spectrum frequency and different continuous attenuation factor of different kinds of lost frames.Signal noise ratio（SNR）test and multiple stimuli with hidden reference and anchor（MUSHRA）test are conducted to evaluate the performance of this approach in adaptive multi-rate wideband plus（AMR-WB＋）audio codec.Compared with the original frame error concealment scheme,our scheme achieves better audio recovery quality in AMR-WB＋audio codec.A novel frame error concealment scheme is proposed to improve the decoded audio quality of the receiver for transform coded excitation（TCX）audio codec.This scheme,which is a gain control approach based on the stability of linear predictive coding（LPC）filter,predicts the lost frames by utilizing the linear spectrum frequency and different continuous attenuation factor of different kinds of lost frames.Signal noise ratio（SNR）test and multiple stimuli with hidden reference and anchor（MUSHRA）test are conducted to evaluate the performance of this approach in adaptive multi-rate wideband plus（AMR-WB＋）audio codec.Compared with the original frame error concealment scheme,our scheme achieves better audio recovery quality in AMR-WB＋audio codec.

关 键 词：frame error concealment audio codec transform coded excitation （TCX） 

分 类 号：TN912.3[电子电信—通信与信息系统]