基于单片机控制的语音采集与回放系统设计研究

介绍了一种采用不同编码方式的语音信号采集与回放系统的设计方案,该系统以AT89C51单片机为控制核心,主要结构由语音前级处理通道、A/D转换模块、单片机控制兼数据处理模块、D/A转换模块、键盘模块和后级处理通道组成,实现了语音的采集与回放功能。系统采用32kB的62256芯片作为语音存储介质,在PCM、DPCM、IV三种编码模式下都能较好地实现语音回放功能。整个系统结构简练、友好,具备较高的性能指标,设计的整体实现具有一定的实用参考价值。

Research on the Design of Voice Acquisition and Playback System Based on MCU Control

A voice signal acquisition and playback system with different encoding methods is introduced. The system uses AT89C51 single chip microcomputer as the control core, and its main structure consists of voice pre-processing channel, A/D conversion module, single chip microcomputer control and data processing module, D/A conversion module, keyboard module and post-processing channel, realizing the function of voice acquisition and playback. The system uses 32kB 62256 chip as the voice storage medium, which can realize the voice playback function well in PCM, DPCM and IV coding modes. The whole system is simple and friendly in structure and has high performance index. The overall implementation of the design has certain practical reference value.