把语音芯片ISD1420录放音时间20秒分成20段，每段一秒，调用录音子程序，录入语音，建立语音库，语音录入结束后，根据段地址，调用放音子程序，还原原来录入语音信号。- The voice chip ISD1420 sound recording time of 20 seconds is divided into 20 segments, each second, a subroutine call recording, voice input, speech database estab