基于ADPCM算法的语音录放系统优化设计与FPGA实现  

Design and Optimization of Voice Record/Playback System Based on ADPCM and the Implementation on FPGA

作　　者：徐朝炯[1] 李平[1] 高峰[1] 

机构地区：[1]电子科技大学微电子与固体电子学院,四川成都610054

出　　处：《电声技术》2007年第B06期27-30,共4页Audio Engineering

摘　　要：介绍了自适应差分脉冲编码调制技术ADPCM的编解码原理和结构,利用硬件描述语言设计并仿真了IMA-ADPCM编解码器及相关电路,以完成语音的录放功能。通过优化编解码器的电路结构,使系统资源消耗减小了1/3。实验平台以Altera的FPGA开发板为基础,实现了语音的录放,语音回放效果达到预期目标。In this paper, the principle and architecture of the encoder and the decoder of Adaptive Differential Pulse Code Modulation（ADPCM） are introduced. Then, the VLSI implementation of IMA-ADPCM encoder/decoder and related circuits is proposed with Verilog HDL dedicatedly for voice record/playback application. The result and explanation are presented after simulation. Based on our working, resource consumption is reduced 1/3 by optimizing the structure of the encoder and decoder. Finally, a simulation platform is established on the foundation of Ahera＇s UP3 education kit. The function of voice record/playback is realized and the performance gains our ends.

关 键 词：自适应差分脉冲编码调制 语音编解码器 优化 FPGA 

分 类 号：TN912[电子电信—通信与信息系统]