基于浮点DSP的PCM与CVSD相互转换的算法  

Realization of Conversion between PCM and CVSD Based on TMS320VC33

作　　者：秦传波[1] 黄国强[1] 江太辉[1] 

机构地区：[1]五邑大学信息学院,广东江门529020

出　　处：《五邑大学学报（自然科学版）》2008年第2期46-51,共6页Journal of Wuyi University(Natural Science Edition)

摘　　要：研究了16 kbit/s连续可变斜率增量调制(CVSD)与64 kbit/s A律PCM编码相互转换的算法和实现.在基于浮点DSP(TMS320VC33)及现场可编程逻辑器件(FPGA)芯片XC3S400硬件平台上,实现了A律压缩与扩展、CVSD编解码算法、2倍因子抽取和内插滤波,成功解决了PCM与CVSD码制的相互转换问题.The digital code conversion algorithm between 16 kbit/s CVSD and 64 kbit/s A-law PCM is developed and has also been realized in this paper. Based on the floating digital processing chip TMS320VC33 and FPGA IC XC3S400, the algorithm completed A-law expansion and compression, CVSD encoding and decoding, decimation filter and interpolation filter with a 2：1 factor. The system has successfully resolved the conversion problem between PCM and CVSD.

关 键 词：数字信号处理器 现场可编程逻辑门阵列 连续可变斜率增量调制 脉冲编码调制 A律压扩 

分 类 号：TN912.31[电子电信—通信与信息系统]