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本文介绍了基于嵌入式MPC885处理器的数话同传机的主要设计思路、模块硬件结构及其工作方式。描述了PowerPC嵌入式处理器(MPC885)在数话同传中的数据通信应用、内部结构以及主要应用的功能特性;并描述了AC4880XC-C低速语音编码处理的工作过程,如何通过配置DSP内核来实现语音压缩、解压功能及收发功能,最后把数据和语音合路运用SCCx的HDLC协议支持和新型的接入技术SHDSL在双绞线上传输。
This article introduces the main design ideas, the hardware structure of the module and its working methods based on the embedded MPC885 processor. Describes the data communication applications, internal structure and main application features of the PowerPC embedded processor (MPC885) in the simultaneous interpretation of numbers. Describes the working process of the AC4880XC-C low-speed speech encoding. By configuring the DSP core Achieve voice compression, decompression function and send and receive functions, and finally the data and voice combined using SCCx HDLC protocol support and a new type of access technology SHDSL on the twisted pair transmission.