摘要
介绍ADPCM标准、RLPC编码原理,编、解码器方框图及工作过程。民航卫星通信网TES系统为节省卫星转发器频率资源对传输的语音信号进行压缩处理,其信道单元基带信号处理器对语音信号进行CCITT推荐的G.721-ADPCM编码和修斯公司专利技术开发的RLPC编码处理,将64 kb/s语音数字信号压缩至32 kb/s,16 kb/s,9.6 kb/s传输,实现语音质量满足一般通信要求的低速率语音信号传输。
This article introduces the ADPCM standard and the RLPC coding principle,the encoder decoder block diagram and the work process. CAAC satellite communication network Telephony Earth Station（TES） system carries on compression processing to the transmission voice signal for saving the satellite transponder frequency resources. Its channel unit baseband signal processor carries on CCITT G. 721 - ADPCM and Hughes company patent technology development RLP C code processing,64 kb/s voice digital signal compression to 32 kb/s, 16 kb/s, 9.6 kb/s transmission. The realization of voice quality satisfies the general correspondence request by low - bitrate voice signal transmission.
出处
《现代电子技术》
2007年第23期62-63,66,共3页
Modern Electronics Technique
