设计了一种可用于语音信号处理的CODEC芯片，讨论了滤波器组的多级实现。
This paper designs a CODEC chip of audio signal processing, and the multi-level filter is discussed.
介绍了一种以数字信号处理器（DSP），调制解调器MODEM和CAN总线为主构成的分布式多级通信系统，此系统已成功应用于某通信站自动监控系统中。
The paper introduces a multilevel telecom system made of DSP, MODEM and CAN BUS. The system is successful used in Auto-supervisory System of a Communication station.
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