新型宽带语音编解码器AMR-WB的研究  

A New Wideband Speech CODEC AMR-WB

作　　者：焦传斌[1] 于保华[1] 李治柱[1] 

机构地区：[1]上海交通大学计算机系,上海200030

出　　处：《计算机仿真》2005年第1期150-152,159,共4页Computer Simulation

摘　　要：该文介绍了一种应用于第三代移动通讯系统的编解码器 ,同时也是第一个可同时用于无线和有线应用的编解码器 ,该编解码器的语音带宽拓展为 5 0Hz到 70 0 0Hz,编码后语音的自然度很高 ,用在 3G移动通讯系统的多媒体服务、宽带包交换网络、音频和视频会议等等。由于AMR -WB为一个全新的宽带编解码器 ,其标准在 2 0 0 1年 3月刚刚通过 ,国外对其的研究也属于起步阶段 ,还没有真正进入实用阶段。尤其在国内 ,至今尚未见到相关的研究。故对其进行全面的分析和深入的研究是必要的 。This paper presents a new speech CODEC which will be used in 3G mobile communication systems and packet networks. A bandwidth of 50 to 7000 Hz improves the intelligibility and naturalness of speech, so it is suitable for multimedia services of the third generation mobile communication systems, wideband telephony over packet networks, audio and video teleconferencing. After a brief discussion about the background of the CODEC, this paper gives a detailed description of its structure and characters. Because the AMR-WB is a new CODEC, and is passed in March 2001,the research about it is still in the initial phase and has not gotten into use. And the research about it has not been taken. So it is necessary to have a deep research in this area and it will be beneficial to the future study.

关 键 词：语音编码 共轭结构代数码激励线性预测 语音激活检测 

分 类 号：TP391.42[自动化与计算机技术—计算机应用技术]