| 基于对数脉冲编码调制的语音压缩系统实现 |
| |
| 引用本文： | 曹晓琳,吴平,丁铁夫.基于对数脉冲编码调制的语音压缩系统实现[J].电子工程师,2004,30(9):25-27,49. |
| |
| 作者姓名： | 曹晓琳 吴平 丁铁夫 |
| |
| 作者单位： | 1. 中国科学院长春光学精密机械与物理研究所,吉林省,长春市,130021;中国科学院研究生院,北京市,100039
2. 中国科学院长春光学精密机械与物理研究所,吉林省,长春市,130021 |
| |
| 摘 要： | 语音对数脉冲编码调制(PCM)在数字电话通信等大型通用数字传输设备中已得到广泛应用.文中将其引入小型专用语音数字化传输设备中,设计并实现了以TMS320VC5402为核心的语音压缩系统.该系统主要由PCM线性编码器、数字信号处理器(DSP)、现场可编程门阵列(FPGA)、高速静态RAM及Flash存储器等构成,可完成64kbit/s的A律对数PCM的压扩.介绍了对数PCM原理,并给出了系统硬件连接及主要程序流程.
|
| 关 键 词： | 对数脉冲编码调制 语音压缩系统 A律 数字信号处理器 |
| 修稿时间： | 2004年6月15日 |
Realization of a Speech Compression System Based on Logarithmic Pulse Code Modulation |
| |
| Cao Xiaolin ,Wu Ping ,Ding Tiefu.Realization of a Speech Compression System Based on Logarithmic Pulse Code Modulation[J].Electronic Engineer,2004,30(9):25-27,49. |
| |
| Authors: | Cao Xiaolin Wu Ping Ding Tiefu |
| |
| Affiliation: | Cao Xiaolin 1,2,Wu Ping 1,2,Ding Tiefu 1 |
| |
| Abstract: | Logarithmic pulse code modulation of speech has been used widely in many digital transmission facilities, such as digital telephone network. In this paper, this method is adopted to one small special speech digital transmission facility. A speech compression system based on a TMS320VC5402 chip is designed. This system is composed of PCM linear encoder, DSP, FPGA, high speed static RAM and Flash. It can realize the compression of speech using A-law logarithmic pulse code modulation. Logarithmic pulse code modulation is introduced in this paper. The hardware composition and software flow chart of this system are presented in detail. |
| |
| Keywords: | logarithmic pulse code modulation speech compression system A-law DSP |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
