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将自适应增量调制器和解调器用于系统中的起始级和最末级,以便把编解码的电话信号变成u=255的压扩脉码调制.本系统的目的是设计一种可靠的不需调整分压器且便于大量生产的经济编解码器、这种安排是电路重心从模拟到数字的变化,以便能充分利用低成本,低速率的数字处理技术,(如MθS/LS1就可达到所需要求).本文讨论了样机的系统结构,数字信号处理,系统的实现及性能.
An adaptive delta modulator and demodulator is used for the start and final stages in the system to turn the codec telephone signal into a companded pulse code modulation with u = 255. The purpose of this system is to design a Reliable economic codec that eliminates the need for a voltage divider and is easy to mass-produce. This arrangement shifts the circuit’s focus from analog to digital to take full advantage of low-cost, low-rate digital processing techniques such as MθS / LS1 You can achieve the desired requirements.) This article discusses the prototype system architecture, digital signal processing, system implementation and performance.