摘要
介绍了第三代移动通信系统中自适应多码率的源控制速率机制,以及这种机制需要的两项技术支持,语音激励检测与柔和噪声产生。简要描述了在不连续传输时对语音激励检测的选择,说明了在源控制速率的工作过程中噪声参数的编译码以及AMR窄带语音中的噪声产生。
This paper describes the operation of the Adaptive Multi-Rate speech codec with Source Controlled Rate(SCR)in the third generation of mobile communication system and the default SCR mechanism requiring the following functions:Voice Activity Detector(VAD)and gen-eration of the background acoustic noise,At the same time,It specifies two alternatives for the Voice Activity Detector(VAD)to be used in the Discontinuous Transmission and gives the de-tailed requirements for the correct operation of the background acoustic noise evaluation,noise parameter encoding /decoding and the generation of comfort noise.[
出处
《电声技术》
北大核心
2002年第6期52-57,64,共7页
Audio Engineering
