In this design many technologies such as DSP, low bit-rate speech compression, channel multiplexing, Flash Memory and communication with modem through se rial port are used.

设计中采用了DSP、低比特率语音压缩编解码、信道复用、快闪存储、串口和调制解调器通信等技术。

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From the point of view of relative level, this paper proposes a novel approach for the multilevel compression in Walsh code-division multiplexing digital communication.

本文从相对电平的观点出发，提出了一种沃尔什码分多路信号多电平压缩的新方法。

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