基于Blackfin双核处理器的音频系统设计与实现  

Design and implementation of Audio system Based on Blackfin Dual Cores

作　　者：黄存东[1] 刘宜东 

机构地区：[1]安徽国防科技职业学院信息工程系,237011 [2]六安广播电视大学,237000

出　　处：《中国科技信息》2007年第5期130-131,134,共3页China Science and Technology Information

摘　　要：音频系统在嵌入式领域中有着广泛的应用,在网络视频公话终端产品中,音频系统需要实现语音采集、编码、解码、输出和网络传输五种功能。为了充分利用处理器的双核特性,采取了音频系统各功能模块分别运行于两个核心上的策略;同时设计了双核间的软件通讯机制,并在现有的开发环境下,实现了音频系统的各功能模块及uClinux操作系统下的音频驱动程序。Audio system is widely used in the field of embedded system. In the products of network video telephone terminal, audio system＇ s realization is separated into five parts： audio gathering, audio coding, audio decoding, audio export module and network module, In order to make the best use of the processor ADSP- BF561＇ s characteristic in dual cores, the network video telephone terminal realizes the audio gathering and encoding in one black fin core and audio exporting and decoding in another blackfin core. At the same time, the communication mechanism of the dual core is realized, Audio Each function module in audiosystem and audio driver＇ s process in uClinux system are realiZed too.

关 键 词：嵌入式音频系统 音频编码 音频解码 双核心 

分 类 号：TP391.42[自动化与计算机技术—计算机应用技术]