摘要
在电话自动转接装置中,为有效判断电话线路状态,常采用基于DSP等复杂器件判断线路信号,进一步判断线路状态;但嵌入式系统具有体积大、功耗高、成本高等缺点。装置通过单片机FFT运算,提取呼叫过程音信号,判断呼叫处理进程,并进行相应的操作处理。通过单片机FFT算法实现的电话线路状态判断与处理装置,能够准确识别话路呼叫信号音,为电话自动转接提供可靠线路状态信号。本设计在经济性、可靠性、低功耗、微型体积方面具有优势。
On the phone auto switching devices, in order to determine the status of telephone lines effectively, the complex DSP-based devices are used. But with large embedded systems, the tion are shortcomings. The device extracts the line signal to determine call process higher cost and power consumpthrough FFF computation based on the MCU and make the corresponding handling. Through the FFr algorithm to determine the status of the telephone lines, the device is able to accurately identify the call signal, then provide state of the signal to the telephone auto switch. The design has advantages in the economv, reliabilitv.low power consumption and micro-volume.
出处
《科学技术与工程》
2009年第16期4803-4805,共3页
Science Technology and Engineering
关键词
单片机
FFT
呼叫处理信号音
MCU fast fourier transform call process signal
