MELP在数字对讲机基带系统中的应用  

Application of MELP in Baseband Digital Intercom System

作　　者：陈学艺[1] 凌朝东[1] 陈哲平[1] 杨骁[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361008

出　　处：《通信技术》2012年第9期123-125,133,共4页Communications Technology

基　　金：厦门市科技计划项目(No.3502Z0113015)

摘　　要：低速率语音编码技术是语音通信中重要的研究方向,在数字对讲机信道频率资源有限、复杂的传输环境下,具有广泛的应用前景。采用TMS320VC5510数字信号处理器(DSP)作为硬件开发平台,结合MSP430微控制器和CC1101射频模块,对一种低成本、低功耗的民用数字对讲机的基带系统方案进行研究。实现数字对讲机中混合激励线性预测(MELP)低速语音压缩编码,结合DSP硬件特点进行算法优化,在满足实时性的要求下,得到了较好的语音质量。Low-rate speech coding technology, as an important research direction in the voice communication, has wide application prospects in the digital intercom with limited channel frequency resources and complicated transmission environment. With TMS320VC5510 as hardware development platform and in combination with the MSP430 MCU and CCllO1 RF module, an in-depth study on the low-cost, low-power baseband civil digital intercom system scheme is done. MELP （Mixed-excitation linear prediction） low-rate speech coding is implemented on a digital intercom, and combined with the DSP hardware characteristics, the algorithm is optimized, thus meeting the real-time requirements and obtaining the better voice quality.

关 键 词：数字对讲机 MELP 语音编码 DSP 基带 

分 类 号：TN912.32[电子电信—通信与信息系统]