A New Wideband Speech CODEC AMR-WB
LI Zhi-zhu · Jisuanji fangzhen · 2005
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.