基于ARM的数字音频解码系统的设计与实现  

Design and Implementation of Digital Audio Decoder System Based on ARM

作　　者：宋志章[1] 马丽 刘晓华[1] 

机构地区：[1]齐齐哈尔大学,黑龙江齐齐哈尔161006 [2]齐齐哈尔市质量技术监督检验检测中心,黑龙江齐齐哈尔161006

出　　处：《科技通报》2012年第6期161-162,165,共3页Bulletin of Science and Technology

基　　金：黑龙江省教育厅科研项目"基于NiO/Si纳米线微纳甲醛气体传感器的研制"(11541398)

摘　　要：研究数字音频解码系统的设计。为了获得低成本、高质量的音频解码系统,以嵌入式系统和数字音频系统为基础,设计数字音频解码系统。解码系统硬件以S3C2410微处理器、存储器芯片以及U-DA1341TS立体声音频解码芯片为基本框架,实现音频的采集、存储和解码播放。软件以ADS1.2集成开发环境为平台,完成了引导程序、操作系统、根文件、设备驱动、数字滤波以及解码程序的移植。本设计实现的解码系统具有价格低,电路设计简单,抗干扰性能好,解码质量好的优点。The main task of this research is designing a digital audio decoded embedded system. Firstly, by studying the S3C2410 processor, the system takes S3C2410 processor as the core, adds some outer components such as memory, audio UDA1341TS decoding chip and so on. Secondly, the drivers of the audio chip are programmed and transplanted into Linux kernel. Lastly, The approach is adopted in this research which based on the wavelet transform. Wavelet transform has good denoising ability and better result of signal enhancement than other conventional methods. But the wavelet transform result is floating data, for the sick of the bruited memory units of DSPs, it is difficuk to realize hardware. So the lifting wavelet is used in WT filter. Based on the high speed operation ability of and the strongly control and communication ability of ARM, this digital audio decoded embedded system shows good performance obviously than other methods.

关 键 词：ARM 嵌入式系统 数字音频 S3C2410 UDA1341TS 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论]