摘要传统的磁带语音录放系统因其体积大、使用不便,在电子与信息处理的使用中受到许多限制。本文提出的体积小巧，功耗低的数字化语音存储与回放系统将完全可以替代它。数字化语音存储与回放系统的基本原理是对语音的录音与放音的数字化控制。其中，关键技术在于，为了增加语音存储时间，提高存储器的利用率，采纳了非失真压缩算法对语音信号进行压缩后再存储，而在回放时再进行解压缩，同时,对输入语音信号进行数字滤波以抑制杂音和干扰,从而确保了语音回放的可靠质量。 该系统对语音信号分别采纳了数据采集直寸直取,欠抽样采样和自相似增量调制等三种方法,完成了对语音信号 32.7s、65.5s、147.4s 的存储与回放。前直 AGC 将语音信号控制在 A/D 转换器可控制的围之以保证话音信号采样不失真。带通滤波器合理的通带围有效的滤除了带外噪声，减小了混叠失真。通过后级补偿电路对输出的语音信号进行了的校正，回放语音清楚。系统具有自动录音、手动录音、录放音时间显示以与掉电后保护语音信号等功能。关键词：数字化存储，回放，数字滤波，采样，模/数转换，校正AbstractTraditional tape record system because of heavy using inconvenient volume their, receive a lot of restrictions in the use of the electron and information processing. The volume that this text puts forward is small and exquisite， the digitized pronunciation of the low power dissipation can substitute it with the playback system to store. Digitized pronunciation store systematic basic principle recording and to put sound in pronunciation digital control with playback. Among them, key technology lies in : For increase pronunciation store time , raise utilization ratio of memory , adopt non- distorted to compress algorithm go on after compressing storing to pronunciation signal, decompress in the playback ; Meanwhile, to input pronunciation signal carry on figure strain wave by suppressing noising and interfering, thus guaranteed the reliable quality of the playback of the pronunciation. Introducing the direct store & access of data colle...
